# Deep Charger — on-device AI chat

> on-device AI chat (iPhone/iPad app by Koshin Obayashi.)

- Source: https://appshunter.io/ios/app/deep-charger/id6782974140 (this page in markdown: same URL + `.md`)
- Developer: [Koshin Obayashi](https://appshunter.io/developer/1808587169)
- Category: Productivity, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 16.0 · 1.4 GB
- Languages: American English
- Released: 2026-06-30
- Data updated: 2026-08-04
- User reviews in markdown: https://appshunter.io/ios/app/deep-charger/id6782974140/reviews.md

## What is 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.


## Version history (last 1 release)

### 1.0 — 2026-07-01

No release notes.

## More apps by Koshin Obayashi

- [Thread planet](https://appshunter.io/ios/app/thread-planet/id6744685859)

All apps by Koshin Obayashi: https://appshunter.io/developer/1808587169

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-04.*