KaiOS
| Developer | KaiOS Technologies (Hong Kong) Limited (with TCL as largest shareholder) |
|---|---|
| Written in | HTML, CSS, JavaScript, C++ |
| OS family | Linux (Unix-like) |
| Working state | Current |
| Source model | Source-available (except for the binary blobs) |
| Initial release | October 2017 |
| Latest release | 4.0 / May 2025 |
| Marketing target | Feature phones |
| Available in | 88 languages |
List of languages Afrikaans, Albanian, Arabic, Armenian, Assamese, Azerbaijani, Basque, Belarusian, Bengali (Bangladesh), Bengali (India), Bodo, Bosnian, Bulgarian, Catalan, Croatian, Czech, Danish, Dogri, Dutch, English (United Kingdom), English (United States), Estonian, Filipino, Finnish, French (Canada), French (France), Galician, Georgian, German, Greek, Gujarati, Hausa, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Kannada, Kashmiri, Kazakh, Khmer, Konkani, Lao, Latvian, Lithuanian, Macedonian, Maithili, Malay, Malayalam, Manipuri, Marathi, Nepali, Norwegian, Oriya, Pashto, Persian, Polish, Portuguese (Brazil), Portuguese (Portugal), Punjabi, Romanian (Moldavia), Romanian (Romania), Russian, Sanskrit, Santali, Serbian (Latin and Cyrillic alphabet), Simplified Chinese, Sindhi, Sinhalese, Slovak, Slovenian, Spanish (Latin America),
Spanish (Spain), Swahili, Swedish, Tajik, Tamil, Telugu, Thai, Traditional Chinese (Hong Kong), Traditional Chinese (Taiwan), Turkish, Ukrainian, Urdu, Vietnamese, Xhosa, Zulu | |
| Package manager | KaiStore |
| Platforms | ARM |
| Kernel type | Monolithic (Linux) |
| Default user interface | Graphical |
| License | Proprietary, Linux kernel patches under GPLv2, B2G under MPL |
| Preceded by | Firefox OS, Nokia Asha platform |
| Official website | www |
KaiOS is a mobile Linux distribution for keypad-based mobile phones. It is designed and optimised for affordable and low-power feature phones, while retaining access to Internet services through web apps, based on the Gecko engine. KaiOS was originally forked from the former Firefox OS open-source project, and is developed by KaiOS Technologies (Hong Kong) Limited; a company based in Hong Kong, whose largest shareholder is Chinese electronics conglomerate TCL Corporation.