AI that respects your planet.
And your privacy.
The hidden cost
Every prompt has
a price.
of water consumed per ChatGPT prompt
Li et al. 2023, UC Riverside
1 ChatGPT prompt
519 ml
of water consumed
1 day of ChatGPT
4.7 kWh
server energy used
1 koa prompt
0
cloud resources used
Private by design
Core AI stays
on your iPhone.
koa is built so prompts, conversations, and files used in core AI features stay local to your device. We still use limited service data for support and Firebase Remote Config, but there are no accounts, no sign-in, and no cloud sync.
Local processing
Core AI features run on your device.
No training on your data
Private prompts and files are not used for remote AI training.
No account or sign-in
Use koa without creating an account.
No cloud sync
Your chats and files are not synced to a Koa account.
Meet koa
Fast. Fluid.
On-device.
Capabilities
Everything you need.
Nothing you don't.
koa matches the features of cloud AI assistants — without sending a single byte to a server.
Fast Mode
Lightning fast responses for everyday tasks
Think Mode
Deep reasoning for complex problems
Vision
Understand photos, screenshots, and documents
Web Search
Privacy-respecting real-time information
Voice Input
Talk naturally, processed entirely on-device
Text to Speech
Natural voices that read responses aloud
File Analysis
Drop in PDFs, images, and documents
Code Runner
Run Python code snippets on-device
Canvas
Side-by-side document editing
How koa compares
Same power.
Zero compromise.
The AI your iPhone
was always capable of.
Private. Powerful. Sustainable.
Start your first conversation today.
FAQ
Questions people ask
before they download.
A quick guide to what local AI means on iPhone, how koa handles privacy, and how the app estimates environmental savings.
Want the full methodology? Read Behind Koa.