Advanced KaiOS Development

Advanced Development Topics for KaiOS Smart Feature Phones

Announcing kaios-types: KaiOS TypeScript Declarations

The kaios-types library includes TypeScript declarations for many proprietary KaiOS APIs and extensions

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Mon, Nov 24, 2025

Deep Dive on Cloud Phone User Agents

Analyzing hundreds of Cloud Phone user agent headers

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Tue, Jun 3, 2025

KaiOS System Properties

Reading and writing system properties on KaiOS

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Thu, Mar 28, 2024

WebAssembly (WASM) on KaiOS

WebAssembly (WASM) and asm.js on KaiOS smart feature phones

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Tue, Mar 5, 2024

Developing with Flutter on KaiOS

Developing apps for KaiOS using Flutter

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Mon, Feb 26, 2024

Deep Dive on KaiOS User Agents

Analyzing hundreds of KaiOS user agent headers

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Fri, Feb 23, 2024

Complete Feature Detection on KaiOS

What features can you detect with navigator.getFeature() on KaiOS?

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Wed, Jan 31, 2024

Practical KaiOS Optimization Tips

Practical tips for meaningfully optimizing KaiOS apps

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Sat, Jan 20, 2024

Running in the Background on KaiOS

How to respond to events and perform background tasks on KaiOS

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Mon, Oct 30, 2023

Certified Apps on KaiOS

What makes KaiOS Certified Apps Special? (with sources)

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Wed, Aug 16, 2023

Bluetooth Low Energy on KaiOS

Working with Bluetooth Low Energy (BLE) on KaiOS

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Mon, Aug 14, 2023

CVE-2023-33293: Installed App List from the KaiOS 3.0 Browser

CVE-2023-33293: Checking Installed Apps and Versions from the KaiOS 3.0 Browser

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Tue, May 23, 2023

CVE-2023-33294: KaiOS 3.0 Root Command Line in Browser via TCT Web Server

CVE-2023-33294: Executing Commands as Root from the Browser via TCT Web Server

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Mon, May 22, 2023

CVE-2023-27108: Call Logs in the Browser

CVE-2023-27108: Accessing Call Logs from the Browser on KaiOS 3.0 & 3.1

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Tue, May 2, 2023

Security and Privacy on KaiOS

Security and Privacy considerations for KaiOS smart feature phones

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Wed, Apr 19, 2023

KaiOS App Optimization Tips

Optimizing apps for KaiOS smart feature phones

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Sun, Apr 2, 2023

Complete KaiOS Permission Guide

Complete Guide to App Permissions on KaiOS

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Mon, Mar 20, 2023

Complete manifest.webapp Guide

Complete Guide to manifest.webapp Properties on KaiOS

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Sat, Mar 11, 2023

The Download on KaiOS Downloads

How to stream and store files on KaiOS

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Sat, Feb 25, 2023

Advanced KaiOS Development: Push Notifications

Sending Notifications with the Web Push Protocol on KaiOS

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Thu, Feb 9, 2023

Advanced KaiOS Development - CORS, TCP Sockets, and Let's Encrypt SSL Certificates

Disabling the Same Origin Policy (CORS), Navigator.mozTCPSocket, and issues with SSL certificates

Posted by map[name:Tom Barrasso url:https://tombarrasso.com] on Thu, Feb 2, 2023