View source for Software:LightOS

{{Infobox OS
| name = LightOS
| logo = <!-- no free logo available -->
| developer = Light (The Light Phone, Inc.)
| family = Android (Linux-based)<ref name="medium-dev">{{cite web |last=Francis |first=Hugh |title=Building LightOS with React Native |url=https://medium.com/sanctuary-computer-inc/building-lightos-with-react-native-4b6e4ad1cd7f |date=January 8, 2020 |website=Medium |publisher=Sanctuary Computer Inc |access-date=July 17, 2025}}</ref>
| working_state = Current
| source_model = Proprietary software (based on AOSP)
| released = {{Start date|2019|09}}<ref name="sanctuary">{{cite web |title=The Light Phone 2 |url=https://www.sanctuary.computer/light-two |website=Sanctuary Computer |access-date=July 17, 2025}}</ref>
| latest_release_version = v534<ref>{{cite web |title=Software Versions & Change Log (Light Phone) |url=https://support.thelightphone.com/hc/en-us/articles/360031105751-Software-Versions-Change-Log |website=The Light Phone (support) |access-date=July 17, 2025 |archive-date=July 9, 2025 |archive-url=https://web.archive.org/web/20250709132540/https://support.thelightphone.com/hc/en-us/articles/360031105751-Software-Versions-Change-Log |url-status=dead }}</ref>
| latest_release_date = {{Start date|2025|10|02}}<ref>{{cite web |title=Software Versions & Change Log (Light Phone) |url=https://support.thelightphone.com/hc/en-us/articles/360031105751-Software-Versions-Change-Log |website=The Light Phone (support) |access-date=July 17, 2025 |archive-date=July 9, 2025 |archive-url=https://web.archive.org/web/20250709132540/https://support.thelightphone.com/hc/en-us/articles/360031105751-Software-Versions-Change-Log |url-status=dead }}</ref>
| marketing_target = {{Unbulleted list
 | Light Phone
 | Light Phone II
 | Light Phone III
}}

| update_model = OTA (over-the-air)
| kernel_type = Monolithic ([[Software:Linux kernel|Linux kernel]], modified)
| ui = Custom (React Native-based launcher)
| license = Mixed ([[Software:Apache License|Apache 2.0]] for Android Open Source Project components, plus proprietary modifications)
| website = {{URL|thelightphone.com}}
}} 

'''LightOS''' is a proprietary [[Mobile operating system|mobile operating system]] developed by [[Company:Light Phone|Light]] for its minimalist Light Phone series of mobile phones, including the Light Phone II and Light Phone III. It is an [[Software:Android (operating system)|Android]]-based platform ([[Software:Fork (software development)|forked]] from [[Software:Android Oreo|Android 8.1 Oreo]]) that uses a custom interface built with [[Software:React Native|React Native]].<ref name="medium-dev" /> LightOS was developed in collaboration with the design agency Sanctuary Computer Inc., which joined Light in early 2018 to create the phone’s software stack.<ref name="medium-dev" /> According to its developers, LightOS is the first [[Operating system|operating system]] to embed a React Native application as the core UI [[Software:List of Android launchers|launcher]].<ref name="medium-dev" /> The system is intentionally streamlined and designed to be used "as little as possible",<ref name="sanctuary" /> providing only basic tools and eschewing the expansive app ecosystems of standard [[Engineering:Smartphone|smartphone]]s. 

== Overview ==
LightOS is the software platform running on Light's minimalist phones, which are often described as "anti-smartphones". It aims to offer only essential phone functions in order to reduce distractions and encourage intentional use of technology.<ref>{{cite web |last=Hart |first=Jordan |title=I tried out a premium 'dumb' phone that costs more than a new iPhone. Here's how its camera shapes up. |url=https://www.businessinsider.com/tried-dumb-phone-costs-more-than-new-iphone-light-3-2025-3 |website=Business Insider |date=March 27, 2025 |access-date=July 17, 2025}}</ref> The Light Phone II and III running LightOS can perform core tasks like calls and [[SMS]] texting, along with a handful of additional features referred to as "tools" rather than apps. The operating system does not support an app store or any third-party apps, and it omits services like web browsing, [[Email|email]] and [[Social:Social media|social media]] entirely.<ref>{{cite web |last=Pierce |first=David |title=Light Phone III review: everything in moderation |url=https://www.theverge.com/2025/3/27/22956721/light-phone-3-review-minimalist-smartphone-light-os |website=The Verge |publisher=Vox Media |date=March 27, 2025 |access-date=July 17, 2025}}</ref><ref>{{cite web |last=Nelius |first=Joanna |title=One year with the Light Phone 2 – This 'dumb phone' didn't completely replace my smartphone, but it did change my life. |url=https://www.theverge.com/24140675/light-phone-2-one-year-retrospect |website=The Verge |publisher=Vox Media |date=April 26, 2024 |access-date=July 17, 2025}}</ref> This minimalist philosophy is a deliberate design choice by Light; the company promotes LightOS as providing "just the tools you’ll need", with no infinite feeds, advertising, or addictive applications.<ref>{{cite web |title=Tool Availability Status |url=https://support.thelightphone.com/hc/en-us/articles/360031128671-Tool-Availability-Status |website=The Light Phone (Support) |access-date=July 17, 2025 |archive-date=August 16, 2021 |archive-url=https://web.archive.org/web/20210816181402/https://support.thelightphone.com/hc/en-us/articles/360031128671-Tool-Availability-Status |url-status=dead }}</ref> In practice, LightOS devices are positioned as secondary phones or simplified primary phones for users seeking a [[Digital detox|digital detox]] or minimal connectivity.<ref>{{cite magazine |last=Chokkattu |first=Julian |title=Review: Light Phone III – A significant hardware upgrade over its predecessor, the Light Phone III is the digital detox we need right now. |url=https://www.wired.com/review/light-phone-iii/ |magazine=Wired |date=March 27, 2025 |access-date=July 17, 2025}}</ref> 

== Development ==
LightOS is built on the Android Open Source Project (AOSP) foundation. Specifically, the version running on the Light Phone II was forked from [[Engineering:Android version history#Android 8.1|Android 8.1 Oreo]], as that was the base OS provided for the phone's Qualcomm MSM8909 chipset (Snapdragon 210).<ref name="medium-dev" /> On top of the [[Software:Linux kernel|Android kernel]] and drivers, they implemented the user interface and native applications using React Native – a [[JavaScript]] [[Software:Web framework|web framework]] typically used for [[Cross-platform software|cross-platform]] app development. The React Native layer in LightOS is integrated as a platform-signed system application (acting as the [[Software:Comparison of desktop application launchers|home/launcher app]]).<ref name="medium-dev" /> This approach allowed the developers to more easily create a consistent UI and manage the unique demands of the phones' displays (such as the Light Phone II’s monochrome [[Company:E Ink|E Ink]] screen) using [[Declarative programming|declarative]] [[Software:React|React]] components, rather than the imperative Android UI toolkit.<ref name="medium-dev" /> Light’s co-founder has said that the decision to use React Native was driven by the need for a "reactive" and flexible rendering system to accommodate the slow [[Refresh rate|refresh rate]] and ghosting issues inherent to e-ink displays.<ref name="medium-dev" /> The operating system was primarily developed by Light’s in-house team in partnership with Sanctuary Computer, a software studio based in New York. Sanctuary joined the project in early 2018 to assist with system architecture and product development for the second Light Phone, contributing to the OS design, a custom online dashboard, and cloud infrastructure.<ref name="medium-dev" /> The Light Phone 2 began shipping to backers in September 2019 with LightOS as its operating system.<ref name="sanctuary" /> (The Light Phone 2 device was recognized as one of ''Time'' magazine’s "Best Inventions of 2019", highlighting the innovative nature of its stripped-down software approach.<ref name="medium-dev" />) Development of LightOS has been continuous since launch, with the small Light team providing regular [[Engineering:Over-the-air update|over-the-air software updates]] to add features and improve stability.<ref>{{cite web |title=Phone Updates – How LightOS updates work |url=https://support.thelightphone.com/hc/en-us/articles/360031128871-Phone-Updates |website=The Light Phone (Support) |access-date=July 17, 2025 |archive-date=July 9, 2025 |archive-url=https://web.archive.org/web/20250709125424/https://support.thelightphone.com/hc/en-us/articles/360031128871-Phone-Updates |url-status=dead }}</ref> In 2021, Light also released a software development kit (SDK) and indicated interest in allowing third-party developers to create custom "tools" for the platform using React Native, though in practice LightOS remains a closed ecosystem and no public app store has been introduced.<ref name="medium-dev" /> 

== Features ==
Because of its "tools, not apps" design ethos, LightOS includes only a limited selection of basic features. Out of the box, the phones provide calling and texting ([[SMS]]/[[Multimedia Messaging Service|MMS]] messaging), along with a few simple built-in tools such as an alarm clock and a basic calculator. Over time, Light has added more optional tools that users can choose to enable. As of 2025, available tools on LightOS include:
Contacts and dialing – A phone app for calls, and a contacts directory (including a "Directory" lookup tool to find businesses and their details).<ref>{{cite web |title=New Directory Tool and Default Location Setting (Light Phone update) |url=https://www.instagram.com/p/CeKkt-XuL4y/ |website=Instagram |date=May 28, 2024 |access-date=July 17, 2025}}</ref>
Messages – SMS messaging interface (with support for group texts). Picture messaging (MMS) was initially absent but was introduced in a later LightOS update, allowing users to send photos via text.<ref>{{cite web |last=Hart |first=Jordan |title=I tried out a premium 'dumb' phone that costs more than a new iPhone... |url=https://www.businessinsider.com/tried-dumb-phone-costs-more-than-new-iphone-light-3-2025-3 |website=Business Insider |date=March 27, 2025 |access-date=July 17, 2025}}</ref> (Incoming multimedia messages or hyperlinks are still not rendered on the device; instead, the OS can forward such content to the user’s email for later viewing.<ref>{{cite web |last=Nelius |first=Joanna |title=One year with the Light Phone 2 |url=https://www.theverge.com/24140675/light-phone-2-one-year-retrospect |website=The Verge |date=April 26, 2024 |access-date=July 17, 2025}}</ref>)
Alarm/Timer – A simple alarm clock (with multiple alarms support) and a countdown timer tool.<ref>{{cite web |title=LightOS v430 – Introducing the Timer Tool |url=https://support.thelightphone.com/hc/en-us/articles/360031105751-Software-Versions-Change-Log |website=The Light Phone (Support) |date=April 1, 2024 |access-date=July 17, 2025 |archive-date=July 9, 2025 |archive-url=https://web.archive.org/web/20250709132540/https://support.thelightphone.com/hc/en-us/articles/360031105751-Software-Versions-Change-Log |url-status=dead }}</ref>
Calculator – A basic calculator tool.
Notes/Voice memos – A note-taking tool that can also record voice memos.
Music player – A simple audio player for music files. Users can upload MP3s to the phone via the Light dashboard; streaming services (e.g. Spotify or Apple Music) are not supported.<ref>{{cite web |last=Hart |first=Jordan |title=I tried out a premium 'dumb' phone...' |url=https://www.businessinsider.com/tried-dumb-phone-costs-more-than-new-iphone-light-3-2025-3 |website=Business Insider |date=March 27, 2025 |access-date=July 17, 2025}}</ref>
Podcast player – An audio podcast tool that allows downloading episodes for offline listening. (Like the music tool, it requires using the dashboard or phone to subscribe to feeds; there is no integrated podcast directory on the device.)
Calendar – A simple calendar for events and reminders.
Maps (Directions) – A navigation tool providing step-by-step directions. This tool uses a third-party mapping API (such as Here Maps) to get location and route data, but it offers only text-based turn-by-turn directions or a minimal map, given the device’s simplified interface and (in the Light Phone II) e-ink display.<ref>{{cite web |last=Zelenko |first=Michael |title=Light Phone 2: The high hopes of the low-tech phone |url=https://www.theverge.com/2019/9/4/20849191/light-phone-2-dumb-phone-smartphone-minimalist-apps-price |website=The Verge |date=September 4, 2019 |access-date=July 17, 2025}}</ref>
Hotspot – The ability to share the phone’s cellular data via Wi-Fi tethering (enabled through a simple on/off toggle tool).
All of these tools are written or configured by Light specifically for LightOS, and they can be added, removed, or re-ordered on the phone’s menu through a companion web interface. Each Light phone is linked to a web dashboard (Light Account) which users can log into from a computer or another device; from there, they can manage which tools are installed/enabled on their phone, import contacts, and adjust some settings remotely.<ref>{{cite web |title=Light Account & User Dashboard |url=https://support.thelightphone.com/hc/en-us/articles/360030765232-Light-Account-User-Dashboard |website=The Light Phone (Support) |access-date=July 17, 2025 |archive-date=July 9, 2025 |archive-url=https://web.archive.org/web/20250709131916/https://support.thelightphone.com/hc/en-us/articles/360030765232-Light-Account-User-Dashboard |url-status=dead }}</ref> This design — pushing most optional content management to the web portal — keeps the on-device software as simple as possible. For example, to add music or podcasts, a user must upload audio files or provide podcast RSS feeds via the dashboard; the phone then syncs the content. There is no on-device app installation or app store at all. Notably, LightOS supports fundamental smartphone capabilities under the hood (since it is based on Android), but many are not exposed to the user. It has support for [[Engineering:LTE (telecommunication)|LTE]] data, [[Wi-Fi]] and [[Bluetooth]] connectivity, and can interface with basic peripherals. However, typical smartphone features like web browsing, email, instant messengers, and social networking apps cannot run on LightOS unless the device is hacked by the user to bypass the default software.<ref>{{cite web |title=Tutorial: Android for the Light Phone 2 (jailbreak guide) |url=https://support.thelightphone.com/hc/en-us/articles/360035991934-Tutorial-Android-for-the-Light-Phone-2 |website=The Light Phone (Support) |date=March 22, 2021 |access-date=July 17, 2025 }} </ref> Advanced users have indeed found ways to "[[Software:Rooting (Android)|root]]" or unlock the Light Phone and access a more standard Android interface,<ref>{{cite web |last=Smith |first=Chris |title=Light Phone II hack proves even minimalist phones can run Android apps |url=https://bgr.com/tech/light-phone-2-android-hack-apps/ |website=BGR |date=February 4, 2020 |access-date=July 17, 2025}}</ref> but doing so is unofficial and not supported by Light. 
== Version history ==
Since its initial release on the Light Phone II, LightOS has seen a continuous progression of updates, delivered automatically to users via over-the-air updates. Light does not use conventional [[Software versioning|version numbers]] like "1.0" or "2.0" for public releases; instead, internal build numbers (often in the three-digit range, e.g. v56, v234, v430, etc.) are used to denote updates. Major updates typically coincide with the introduction of new tools or hardware support, while smaller incremental patches address bug fixes and performance improvements. Light Phone II (2019–2024): The Light Phone II launched with a very limited feature set in 2019, initially supporting calls, texts, alarm, and hotspot. Through 2020 and 2021, LightOS updates expanded its functionality: for example, a simple calculator and notes app were added, followed by the release of a directions (navigation) tool and a music player in subsequent updates.<ref>{{cite web |title=Tool Availability Status |url=https://support.thelightphone.com/hc/en-us/articles/360031128671-Tool-Availability-Status |website=The Light Phone (Support) |access-date=July 17, 2025 |archive-date=August 16, 2021 |archive-url=https://web.archive.org/web/20210816181402/https://support.thelightphone.com/hc/en-us/articles/360031128671-Tool-Availability-Status |url-status=dead }}</ref> By mid-2021, the Light Phone II had gained a calendar tool and the ability to use podcasts, among other improvements.<ref>{{cite web |last=Sumra |first=Husain |title=Light Phone II update adds new tools like directions and notes |url=https://www.androidauthority.com/light-phone-2-new-tools-update-1165858/ |website=Android Authority |date=June 9, 2021 |access-date=July 17, 2025}}</ref> Development for the Light Phone II continued in the following years with refinements to the interface (such as messaging performance improvements) and quality-of-life features. In 2022–2023, Light shifted focus to preparing LightOS for the next device, while still issuing occasional patches and adding smaller features (for instance, a "Timer" tool was introduced in an April 2024 update
support.thelightphone.com, and a "Directory" business-search tool in May 2024
support.thelightphone.com for Light Phone II). Light Phone III (2024–present): The Light Phone III, announced in mid-2024 and shipped in 2025, runs a newer iteration of LightOS adapted for its upgraded hardware. Light Phone III introduced a color 3.9-inch [[Chemistry:OLED|OLED]] display (replacing the e-ink screen) and added cameras (a rear and front camera), a fingerprint reader, and [[Near-field communication|NFC]] capabilities for [[Finance:Mobile payment|mobile payment]]s.<ref>{{cite web |last=Pierce |first=David |title=The Light Phone 3 is a little less dumb but still prioritizes minimalism |url=https://www.theverge.com/2024/6/11/23756872/light-phone-3-minimalist-smartphone-specs-price |website=The Verge |date=June 11, 2024 |access-date=July 17, 2025}}</ref> To support these, LightOS was updated with a simple camera application and an image gallery (called the "Album" tool) for viewing photos. However, some features were not fully ready at launch: for example, the fingerprint sensor on the Light Phone III shipped inactive, and the phone's NFC chip did not yet have an enabled payment tool initially.<ref>{{cite web |last=Pierce |first=David |title=Light Phone III review: everything in moderation |url=https://www.theverge.com/2025/3/27/22956721/light-phone-3-review-minimalist-smartphone-light-os |website=The Verge |date=March 27, 2025 |access-date=July 17, 2025}}</ref> Light stated that these capabilities would be turned on in future software updates once the functionality (such as a secure [[Finance:Digital wallet|digital wallet]] or transit pass tool for NFC, and a verification system for the fingerprint unlock) was fully developed.<ref>{{cite web |last=Ingraham |first=Nathan |title=Light Phone III review: Minimalism stretched to the point of frustration |url=https://www.engadget.com/light-phone-iii-review-minimalism-stretched-to-the-point-of-frustration-141559294.html |website=Engadget |date=March 13, 2025 |access-date=July 17, 2025}}</ref> Post-launch updates for Light Phone III have focused on optimizing the new display and camera features (for instance, adding gesture controls for navigation maps, improving camera stability with electronic image stabilization, and enabling media sharing via email).<ref>{{cite web |date=May 1, 2025 |title=LightOS v472 (Light Phone III only) |url=https://support.thelightphone.com/hc/en-us/articles/360031105751-Software-Versions-Change-Log#h_01JV576AM0H36DW82Q4SY9PHF4 |access-date=July 17, 2025 |website=Light Support |publisher=Light Phone |department=Software Versions & Change Log}}</ref> LightOS on the Light Phone III continues to receive regular OTA updates, and the Light team has indicated that, as with the previous model, they will continue to refine the experience and possibly introduce a few additional tools over time.<ref>{{cite web |last=Pierce |first=David |title=Light Phone III review: everything in moderation |url=https://www.theverge.com/2025/3/27/22956721/light-phone-3-review-minimalist-smartphone-light-os |website=The Verge |date=March 27, 2025 |access-date=July 17, 2025}}</ref>

== Reception ==
LightOS and the Light Phone devices have drawn mixed reactions, reflecting a balance of appreciation for their focus and criticism of their limitations. The concept of a phone "designed to be used as little as possible" has been praised by those seeking minimalism and freedom from digital distraction. ''Wired'' described the Light Phone III’s experience as "stylish, well-made, [and] fun to use" in its simplicity, calling it a "digital detox we need right now", and gave the device an 8/10 rating for fulfilling its niche.<ref name="Chokkattu">{{cite magazine |last=Chokkattu |first=Julian |title=Review: Light Phone III |url=https://www.wired.com/review/light-phone-iii/ |magazine=Wired |date=March 27, 2025 |access-date=July 17, 2025}}</ref> ''Time'' magazine honored the Light Phone II (and by extension its operating system) as one of the 100 Best Inventions of 2019, highlighting how it strips the smartphone to its essentials.<ref name="medium-dev" /> Many users who adopted LightOS phones report positive lifestyle changes – for example, spending far less time on their phones each day – and value the intentional friction that the OS introduces to discourage mindless usage.<ref>{{cite web |last=Nelius |first=Joanna |title=One year with the Light Phone 2 |url=https://www.theverge.com/24140675/light-phone-2-one-year-retrospect |website=The Verge |date=April 26, 2024 |access-date=July 17, 2025}}</ref> On the other hand, reviewers often note that the extreme minimalism of LightOS can be a double-edged sword. While acknowledging the elegance of its design, ''Engadget''s review of the Light Phone III commented that the device "can help you break your smartphone addiction, but it makes some major compromises" in functionality.<ref>{{cite web |last=Ingraham |first=Nathan |title=Light Phone III review: Minimalism stretched to the point of frustration |url=https://www.engadget.com/light-phone-iii-review-minimalism-stretched-to-the-point-of-frustration-141559294.html |website=Engadget |date=March 13, 2025 |access-date=July 17, 2025}}</ref> Basic capabilities that users might take for granted even on feature phones – such as picture messaging (MMS), group texts, or a robust predictive keyboard – were missing or imperfect in early versions of LightOS, leading to frustration for some. For example, navigation on the Light Phone II was initially very limited and inaccurate, which critics pointed out could induce anxiety rather than alleviate it.<ref>{{cite web |last=Nelius |first=Joanna |title=One year with the Light Phone 2 |url=https://www.theverge.com/24140675/light-phone-2-one-year-retrospect |website=The Verge |date=April 26, 2024 |access-date=July 17, 2025}}</ref> The slow [[Refresh rate|refresh rate]] of the e-ink screen on the Light Phone II made texting cumbersome for many users, and the absence of conveniences like voice assistants, maps with graphical interfaces, or any form of messaging beyond SMS meant the phone could feel "too limited" for everyday use by modern standards. Some reviewers and consumers have also been critical of the price point of Light's devices relative to their functionality. The Light Phone II retailed around $350 USD, and the Light Phone III launched at $599 (with a planned full price of $799), which is comparable to mainstream smartphones that offer far more features and app ecosystems.<ref>{{cite web |last=Hart |first=Jordan |title=I tried out a premium 'dumb' phone that costs more than a new iPhone... |url=https://www.businessinsider.com/tried-dumb-phone-costs-more-than-new-iphone-light-3-2025-3 |website=Business Insider |date=March 27, 2025 |access-date=July 17, 2025}}</ref> This led some to argue the value proposition was poor – one commentator quipped that charging smartphone prices for a "dumb phone" was "actually criminal".<ref>{{Cite news |last=Hart |first=Jordan |date=27 March 2025 <!-- website: "Mar 27, 2025, 2:34 PM ET"; Factiva: "PD: 27 March 2025; ET: 14:34"; Nexis Uni: "March 27, 2025 Thursday 06:34 PM EST" --> |title=I tried out a premium 'dumb' phone that costs more than a new iPhone. Here's how its camera shapes up. |url=https://www.businessinsider.com/tried-dumb-phone-costs-more-than-new-iphone-light-3-2025-3 |work=Business Insider |id={{Factiva|BIZINS0020250327el3r000jh}}. Nexis Uni [https://advance.lexis.com/api/document?collection=news&id=urn%3acontentItem%3a6FF2-FRJ3-S1D6-50XH-00000-00 6FF2-FRJ3-S1D6-50XH-00000-00].}} <!-- previously cited: {{cite web |date=March 30, 2025 |title=Light Phone 3 triggers debate on TikTok over high price for minimal features |url=https://www.businessinsider.com/light-phone-3-tiktok-reaction-price-minimalist-phone-2025-3 |access-date=July 17, 2025 |website=Business Insider}} --></ref> Others, however, defend the pricing by pointing to the niche scale of production (a small startup building a custom OS and hardware in limited batches) and the unique value it provides to those who truly need a distraction-free device. In summary, LightOS has been received as an intriguing experiment in reversing the trend of increasing smartphone complexity. It has a dedicated following among digital minimalists and those craving a simpler phone experience, and it has influenced broader conversations about "detoxing" from technology. At the same time, its practical trade-offs mean it remains a niche solution. As one review in ''The Verge'' noted, Light Phones "aren’t for everyone", but they offer a compelling alternative vision of what a mobile OS can be when "software intentionally does less, not more".<ref>{{cite web |last=Pierce |first=David |title=Light Phone III review: everything in moderation |url=https://www.theverge.com/2025/3/27/22956721/light-phone-3-review-minimalist-smartphone-light-os |website=The Verge |date=March 27, 2025 |access-date=July 17, 2025}}</ref> 
== References ==
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{{Android}}
{{Linux distributions}}
{{Mobile operating systems}}

[[Category:Android (operating system) software]]
[[Category:Computing platforms]]
[[Category:Embedded Linux distributions]]
[[Category:Linux distributions]]
[[Category:Mobile Linux]]
[[Category:Operating system families]]
[[Category:Mobile operating systems]]
[[Category:Software using the Apache license]]

{{Sourceattribution|LightOS}}