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 Limited; a company based in Hong Kong, whose largest shareholder is Chinese electronics conglomerate TCL Corporation.
| Developer | KaiOS Technologies |
|---|---|
| Kernel / engine | Linux kernel / Gecko rendering engine |
| Supported platforms | ARM, x86 |
| First released | 2017-03-01 |
| User Agent | Browser | Device |
|---|---|---|
| Mozilla/5.0 (Mobile; rv:84.0) Gecko/84.0 Firefox/84.0 KAIOS/3.0 | Firefox Mobile 84 | Unknown |
| Mozilla/5.0 (Mobile; rv:120.0) Gecko/120.0 Firefox/120.0 KAIOS/4.0 | Firefox Mobile 120 | Unknown |
| Mozilla/5.0 (Mobile; Nokia; rv:48.0) Gecko/48.0 Firefox/48.0 KAIOS/2.5 | Firefox Mobile 48 | rv |
| Mozilla/5.0 (Mobile; Touch; rv:109.0) Gecko/111.0 Firefox/111.0 KAIOS/3.5 | Firefox Mobile 111 | Unknown |
| Mozilla/5.0 (Mobile; Nokia 6300 4G; rv:48.0; CAEN) Gecko/48.0 Firefox/48.0 KAIOS/2.5.4 UCKai/1.2.0 | UC Browser 1 | 6300 |
| Mozilla/5.0 (Mobile; Alcatel_3080_4G/1.0; rv:84.0) Gecko/84.0 Firefox/84.0 KaiOS/3.0 | Firefox Mobile 84 | 3080 4G |
| Mozilla/5.0 (Mobile; TCL T435SP; rv:84.0; KAIKID) Gecko/84.0 Firefox/84.0 KAIOS/3.1 | Firefox Mobile 84 | T435SP |
| Mozilla/5.0 (Mobile; ALCATEL4044O; rv:37.0) Gecko/37.0 Firefox/37.0 KaiOS/1.0\t | Firefox Mobile 37 | Cingular Flip II |
| TCL 4056L; rv:84.0) Gecko/84.0 Firefox/84.0 KAIOS/3.0 | Firefox 84 | 4056L |
| Mozilla/5.0(Mobile;ZTE_Z2316_4G;rv:48.0)Gecko/48.0 Firefox/48.0 KAIOS/2.5.1.1 | Firefox Mobile 48 | Z2316 |