Deep Charger
Koshin Obayashi Productivity iPhoneiPadiPod touch
Deep Charger is a free Productivity app for iPhone and iPad by Koshin Obayashi. Requires iOS 17.0. Updated October 3, 2026.
- Price
- Free
- on the App Store
- Size
- 1020 MB
- Age 4+
- Updated
- Oct 3
- 2026 · v1.2
Screenshots
About Deep Charger
Deep Charger is a private AI assistant that runs entirely on your device. No internet connection, no account, and no data ever leaves your iPhone. Ask a question and watch it think. Deep Charger works through problems step by step, showing its full reasoning with clean, beautifully rendered math. WHAT IT'S GREAT AT • Math & word problems — algebra, percentages, probability, arithmetic, solved step by step • Logic and reasoning puzzles • Small coding tasks and clear explanations • Rendered equations — fractions, exponents and more, shown properly • Follow-up questions — it remembers the conversation, so you can dig deeper 100% ON-DEVICE & PRIVATE • Runs a compact reasoning AI model locally on Apple Silicon • Works fully offline — try it in Airplane Mode • No sign-up, no tracking, no cloud • Your conversations stay on your phone BUILT FOR APPLE SILICON Deep Charger uses an optimized on-device engine (MLX / Metal) to run a real language model right on your iPhone — fast and battery-aware. GOOD TO KNOW Deep Charger is a compact reasoning model focused on math, logic and step-by-step thinking — not a web search engine or encyclopedia. It shines at problem-solving and reasoning; for the latest facts or live data, use a connected tool. Private. Offline. Always in your pocket.
What’s new
Version 1.2 · Updated October 3, 2026
It remembers the conversation now. - Follow-up questions work Ask "when was it finished?" after a question and it knows what you mean. The conversation is held in compressed form, so a long chat does not cost the device more. - Lighter The internal compressor now runs in a smaller format: about 260 MB less memory and about 260 MB off the app size, with the same answers. - Steadier answers The default sampling is calmer than before.
App privacy
The developer, Koshin Obayashi, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
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