1
Describe it
Type what you want in plain words — "a countdown to my exam with a big number."
Chaaga
No sign-up to start
The best apps are the ones you will create
Describe what you want in a sentence. Chaaga builds it into a real app on your phone.
App Store
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Google Play
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iPhone & Android · Free to try
How it works
2
AI builds it
Chaaga writes it and opens it a few seconds later. Nothing to install, nothing to set up.
3
Use it, tweak it, keep it
Ask for changes in the same chat — "make the button bigger", "add a reset". It stays on your phone for good, and you can share it.
What you can make
Real things people made in a few minutes. Each one started with a single sentence.
Split the Bill
Tip, tax and who owes what, in three taps.
Streaks
A habit grid that fills in as the month goes.
Dice Table
d4 through d20 with a shake-to-roll gesture.
Days Until
One giant number counting down to the thing.
Flashcards
Paste a list, get a swipeable study deck.
Tap Racer
A silly two-thumb race for two people, one phone.
Shift Pay
Log hours, see the paycheck before payday.
Plant Water
Six plants, six schedules, one nudge a day.
Why Chaaga
On-device and private
Your apps and their data stay in local storage on your phone. Nothing is uploaded to us.
Your key or ours
Buy usage in our shop or paste your own API key and pay nothing extra.
The code is right there
A code editor is included, change a color, break something on purpose.
No sign-up to start
Install, bring your own key, type, build.
Bring your own key
(Optional) Already have an AI you like?
Pay for Anthropic, OpenAI or similar APIs? Connect it and your builds run through your account.
Anthropic
OpenAI
DeepSeek
OpenRouter
Questions
Is it free?+
You need no card and no account if you bring your own API key, you can also buy usage.
Do I need to know how to code?+
No. Describing what you want is enough. If you do read code, the editor is one tap away and every app is a web file you can rewrite by hand.
Where does my data live?+
On your device. Apps and whatever they store never leave the phone. The only thing sent out is the prompt you type, which goes to the AI gateway.
Which AI models can I use?+
Anthropic, OpenAI and anything using their format.
How many apps can I make?+
As many as you want. There's no cap on how many apps you keep on your phone — build a new one whenever an idea shows up.
What will you make on the bus home?
App Store
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Google Play
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