Simple apps that
just work.
We build small, focused utility apps for Android & iOS.
No bloat. No ads overload. Just tools that make your life easier.
uax.io is an indie app studio founded in 2016, building lightweight utility apps for Android and iOS. With over 2 million downloads across Google Play and the App Store, our apps serve users in 150+ countries. Every app is privacy-first — zero analytics SDKs, zero trackers, and minimal permissions.
Built to solve
real problems.
Every app does one thing — and does it well.
Phone Info
Comprehensive device info — CPU, GPU, RAM, sensors, display, battery, and more.
Water Tracker
Track daily water intake with reminders, widget, and Siri. Ultra-lightweight, private, no ads.
Audio Extractor
Extract high-quality audio from any video file on your device. Fast, simple, reliable.
JSON Formatter & Query
Format, beautify, and query JSON in your browser. Tree view, themes, and Path/SQL/MongoDB query engine.
Âm Lịch VN
Vietnamese lunar calendar — Can Chi, tiết khí, giờ hoàng đạo, kỷ niệm, and home screen widget. Fully offline.
Micro apps,
macro impact.
We're uax.io — an indie studio building small, focused utility apps since 2016. Our philosophy is simple: each app solves one problem, does it fast, and stays out of your way.
No unnecessary permissions. No data harvesting. Just tools that work.
Lightweight
Small APK sizes. Fast launch. Minimal battery drain.
Privacy First
No tracking. No analytics SDKs. Your data stays on your device.
Focused
One app, one purpose. No feature creep, no bloat.