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ternii

Private AI that works offline
Wai Hung · Productivity
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App info

Developer
Wai Hung
Category
Productivity, Utilities
Released
Sep 23, 2026
Version
2.3.1 (Oct 6, 2026)
Price
Free
Size
18.1 MB
Requires
iOS 16.0
Age rating
13+
Languages
English

In-app purchases

none
Current prices, App Store US.

About ternii

ternii runs a real AI model entirely on your iPhone. No account, no server, no API key. Nothing you type leaves the device — unless you switch on the optional web tools, which fetch live results for the model to read and give you more powerful answers. OUR OWN MODEL, NOT A SHRUNK COPY Brain 1.0 was trained from scratch and is ternary from the very first token of training: 3.42 billion parameters, 8 experts with 2 active per token. A 4-bit model on a phone is a compressed copy of something bigger. Brain's weights on your phone are the weights it was trained with, so nothing was lost squeezing it on. Measured on held-out text, the 1 GB file on your phone scores within 0.25% of the 7 GB checkpoint we trained. MEASURED ON REAL PHONES - Up to 118 tokens per second on iPhone 17 Pro (typically 108-118), with the first word in about 190 milliseconds - Under 200 MB in use. The weights are…
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