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Wikipedia

CalyxOS

CalyxOS is aAndroid-basedoperating system for selectsmartphones,foldables andtablets with mostlyfree and open-source software. It is produced by theCalyx Institute as part of its mission to "defend online privacy, security and accessibility."[2]

CalyxOS
DeveloperThe Calyx Institute
OS familyAndroid (Linux)
Working stateCurrent
Source modelOpen source
Latest release6.2.0[1] / 5 December 2024; 3 months ago (2024-12-05)
Repositorygitlab.com/CalyxOS
Update methodOver-the-air (OTA), ROM flashing
Package managerAPK-based
Platformsarm, arm64
Kernel typeMonolithic (Linux)
Official websitecalyxos.org

CalyxOS preserves the Android security model, using Android's Verified Boot system of cryptographic signing of the operating system, and running with a locked bootloader.[3][4] CalyxOS also features an installer that guides the user through the process of unlocking and then re-locking the bootloader.[5]

History

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The Calyx Institute annual reports[6] state CalyxOS was publicly launched during their 2018–2019 fiscal year. Inspiration includedTails andQubes OS, and goals were said to be "completely open source", removing proprietary Google tracking, and including apps Tor, Signal and CalyxVPN for increased privacy.[7]

CalyxOS supports selectGoogle Pixel,Motorola andFairphone devices, While offering "extended support" for some older Google Pixel devices and the SHIFT SHIFT6mq.[8]

Around April 2022, CalyxOS announced support for theFairphone 4,OnePlus 8T,9, and 9 Pro.[9] However, in May 2022, CalyxOS announcedOnePlus builds were pulled because the bootloader could no longer be relocked on newer devicefirmware.[10][11]

In March 2024, CalyxOS added support for theFairphone 5.[12]

Software

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This list isincomplete; you can help byadding missing items.(September 2022)
Software

name

Feature(s)Notes
Aurora StoreAlternative to the standard Google Play StoreAurora Store uses the same standard catalog of apps and installs apps directly from the Google servers to phone.[13] CalyxOS gives Aurora Store special privileges so that app updates can be automatically installed.
ChromiumFOSS web browserBromite fork, succeededDuckDuckGo mobile browser as the default web browser in June 2022.[14]
F-Droid BasicRepository of FOSS applications for theAndroid platformCalyxOS includes a version of F-Droid called "F-Droid Basic" which allows for streamlined app updates, installs, and uninstalls without elevated privileges.[15]
MicroGFOSS implementation ofproprietaryGoogle Play ServicesSome apps dependent on Google Play Services may not work with MicroG, use of MicroG is optional.[16]
Organic MapsNavigation app with privacyA privacy-focused navigation app for driving, hiking, and cycling. The application usesOpenStreetMap for its map data. It can download maps on the device to be used for location information and navigation without an internet connection.[17]
SeedvaultEncrypted backup and restore application for AndroidThe Calyx Institute sponsored development of SeedVault[18] and an annual report states they "debuted SeedVault" during their 2019-2020 fiscal year.[19]

SeedVault is also used byLineageOS.[20][21]

SignalEncrypted calling/messaging appFree, privacy-focused messaging and voice talk app, preinstalled as messaging app in CalyxOS.[22]

CalyxOS ships withMicroG as an open-source alternative to theGoogle Mobile Services, includingMozilla Location Services as an optional replacement to the location services provided by Google, but gives the user the option to disable microG and its location services.[23]

Reception

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In October 2020, Moritz Tremmel reviewed CalyxOS.[24] A month later, Tremmel explained why he preferred CalyxOS overLineageOS.[25] A year later in September 2021, Tremmel further explained how CalyxOS was different from other ROMs because it did not require as much "fiddling".[26] Rahul Nambiampurath, writing for MakeUseOf in March 2021, termed CalyxOS, "[one of the] best [Android] ROMs for privacy ... offers the perfect middle ground between convenience and privacy".[27] In August 2021, Android Authority wrote CalyxOS "puts privacy and security into the hands of everyday users."[28]

In 2022, the bookc't Sicher ins Netz: How to block out monitors and attackers, said "CalyxOS is one of the youngest custom ROMs, it will only celebrate its second birthday in summer 2022. With a built-in Datura firewall, VPN and Cloudflare DNS, Calyx promises more security than some other mobile systems."[29]

In 2023, CalyxOS was the one alternative phone operating system recommended by Carey Parker in the bookFirewalls Don't Stop Dragons.[30]

See also

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References

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  1. ^"Android 15, December 2024 Security update, Partial".calyxos.org.Archived from the original on December 13, 2024. RetrievedDecember 14, 2024.
  2. ^"About The Calyx Institute - Calyx Institute".calyxinstitute.org. RetrievedNovember 2, 2021.
  3. ^"Security FAQ".calyxos.org. RetrievedMarch 3, 2023.
  4. ^"Android Security Bulletins".calyxos.org. RetrievedMarch 3, 2023.
  5. ^"CalyxOS: Google-freies Android".Linux-Magazin (in German). RetrievedApril 13, 2023.Bei der Installation wird auch der Geräteschlüssel von Google gegen einen von CalyxOS ausgetauscht. Das ermöglicht einen verifizierten Bootvorgang und stellt sicher, dass sich nur von CalyxOS signierte Updates installieren lassen. Um den Schutz zu aktivieren, fragt der Installer am Schluss, ob er den Bootloader wieder sperren soll, was es zu bestätigen gilt. Anschließend ist die CalyxOS-Installation startklar.
  6. ^"Financials and Annual Reports - Calyx Institute".calyxinstitute.org. RetrievedJuly 26, 2022.
  7. ^"Annual Report 2018-2019"(PDF). Archived from the original on July 26, 2022. RetrievedSeptember 19, 2022.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
  8. ^"Device Support".calyxos.org. RetrievedOctober 11, 2023.
  9. ^"Fairphone 4, OnePlus 8T, OnePlus 9 test builds now available".calyxos.org. RetrievedJuly 30, 2022.
  10. ^"May 2022 Security update - Fairphone 4, OnePlus 8T, 9, 9 Pro".calyxos.org. RetrievedJuly 30, 2022.
  11. ^"OnePlus Android 12 firmware - relocking no longer works".calyxos.org. RetrievedJuly 30, 2022.
  12. ^"Fairphone 5, March update progress".calyxos.org. RetrievedMay 11, 2024.
  13. ^"Aurora Store".calyxos.org. RetrievedSeptember 29, 2022.
  14. ^"June 2022 Security update - Pixels".Archived from the original on October 25, 2022.
  15. ^"F-Droid".calyxos.org. RetrievedSeptember 29, 2022.
  16. ^"microG".calyxos.org. RetrievedAugust 1, 2022.
  17. ^"Organic Maps: Offline Hike, Bike, Trails and Navigation".13ea2c58.organicmaps.pages.dev. RetrievedAugust 24, 2023.
  18. ^"SeedVault - Calyx Institute".calyxinstitute.org. RetrievedJuly 23, 2022.
  19. ^"Annual Report 2019-2020"(PDF). Archived from the original on July 26, 2022. RetrievedSeptember 19, 2022.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
  20. ^Hazarika, Skanda (November 4, 2020)."LineageOS adopts SeedVault as its open source backup solution".XDA Developers.
  21. ^Hazarika, Skanda (March 31, 2021)."LineageOS 18.1 based on Android 11 is here for nearly 60 devices".XDA Developers. RetrievedApril 13, 2023.
  22. ^"Signal".calyxos.org. RetrievedSeptember 29, 2022.
  23. ^"5 De-Googled Android-based Operating Systems".It's FOSS. November 13, 2021. RetrievedApril 13, 2023.Instead of not shipping the Google Mobile Services (GMS) and leaving users to figure stuff out by themselves (flashing gapps etc), CalyxOS ships with microG. However, you can choose to enable/disable it, thus, giving you total control. [...] Uses Mozilla Location Services instead of Google's Location Services
  24. ^Moritz Tremmel (October 19, 2020)."CalyxOS im Test: Ein komfortables Android mit einer Extraportion Privacy".Golem.de (in German). RetrievedFebruary 2, 2021.
  25. ^Tremmel, Moritz (November 10, 2020)."Bye-bye, Lineage OS!".www.golem.de (in German).Archived from the original on November 12, 2020. RetrievedNovember 2, 2021.
  26. ^Tremmel, Moritz."CalyxOS: Google-freies Android".Linux-Magazin (in German). RetrievedNovember 2, 2021.
  27. ^"What's the Best Privacy-Focussed Android ROM?".MUO. March 29, 2021. RetrievedNovember 2, 2021.
  28. ^"Gary Explains: Linux turns 30, Tesla's D1 chip, Power⚡️ over Ethernet & more!".Android Authority. RetrievedNovember 2, 2021.
  29. ^c't-Redaktion (May 18, 2022).c't Sicher ins Netz: So sperren Sie Überwacher und Angreifer aus (in German). Heise Medien GmbH & Co. KG.ISBN 978-3-95788-313-1.
  30. ^Parker, Carey (2023), Parker, Carey (ed.),"Odds and Ends",Firewalls Don't Stop Dragons: A Step-by-Step Guide to Computer Security and Privacy for Non-Techies, Berkeley, CA: Apress, pp. 541–558,doi:10.1007/978-1-4842-9036-1_13,ISBN 978-1-4842-9036-1, retrievedApril 13, 2023
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