# DeepThink — Private Offline Thinking AI

> Offline, private AI assistant with self-reflection for accurate reasoning. (iPhone/iPad app by 3DTOPO Inc..)

- Source: https://appshunter.io/ios/app/deepthink/id6741049434 (this page in markdown: same URL + `.md`)
- Developer: [3DTOPO Inc.](https://appshunter.io/developer/306248371)
- Category: Utilities, Productivity
- Price: $2.99
- Rating: 3.00/5 from 2 App Store ratings
- Age rating: +4
- Requires: iOS 18.0 · 21 MB
- Languages: American English
- Released: 2025-02-24
- Data updated: 2026-08-29
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/deepthink/id6741049434/reviews.md

## What is DeepThink?

Transform your device into a personal AI assistant that works completely offline. DeepThink runs entirely on your device, giving you unlimited conversations with absolute privacy – no internet required and we never transmit your messages anywhere.

One purchase, unlimited access. No subscriptions, no accounts, no API keys needed. Share with up to six family members through Family Sharing. While we may transition to a subscription model in the future, anyone who purchases now will have lifetime access to the app at no additional cost.

DeepThink is powered by DeepSeek R-1, a groundbreaking AI model distilled and optimized for mobile devices. R-1 represents a new generation of AI assistant that carefully performs internal self-reflection and reasoning before responding. Until recently, even leading AI services would generate answers without proper reasoning steps. This led to errors on seemingly simple questions like "Is 9.11 greater than 9.9" and "How many letter R's are in the word Strawberry". DeepThink, through R-1's methodical reasoning process, tackles these examples and much more with accuracy.

Key Features:
• Complete privacy – all processing happens on your device
• Works offline – think with AI anywhere, anytime
• Unlimited conversations – no usage limits or extra fees
• Output has formatted Markdown and LaTeX rendering
• Full chat history with conversation review and resume
• Copy responses as rich text or Markdown
• Family Sharing enabled – share with up to 6 family members
• Thoughtful responses through AI self-reflection
• Simple temperature controls to fine-tune responses
• Advanced settings for power users

While DeepThink may not beat online enterprise AI services for many uses, it excels at being your offline and private thinking partner. The rare occasions where it needs a reset are easily handled with the stop button or by adjusting temperature settings.

Coming Soon to free updates:
• Additional AI models
• Faster performance
• Editable context

Like all AI systems, DeepThink may occasionally make mistakes. Users should verify important information and are responsible for how they use the AI's output. We believe in being transparent about both capabilities and limitations while delivering genuine value through private, offline AI assistance.

We're passionate about making DeepThink better with each update. Your feedback and suggestions play a crucial role in shaping future versions – we read every comment and feature request. Join us in evolving DeepThink into an even more capable offline AI companion. Share your thoughts with us @3DTOPO on X (formally Twitter), through App Store reviews or support contact information.


Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Additional Terms of Use: Any user assumes full responsibility for any and all use of information provided by DeepThink. The app's AI-generated responses are provided "as is" without any warranties of accuracy or fitness for any particular purpose. Any user must independently verify any information provided by the app before relying on it.

## Key features

- Complete privacy on-device processing
- Offline functionality
- Unlimited conversations
- Markdown and LaTeX rendering
- Full chat history
- Family Sharing up to 6 members
- AI self-reflection for thoughtful responses


## Frequently asked questions about DeepThink

### What is DeepThink?

DeepThink is a personal AI assistant that runs entirely on your device, offering private and offline conversations. It uses the DeepSeek R-1 model, which performs internal self-reflection and reasoning before responding, aiming for greater accuracy.

### Does DeepThink have ads?

No, DeepThink does not contain advertisements. It is a paid application that offers unlimited access with a single purchase.

### How much does DeepThink cost?

DeepThink is available for a one-time purchase of $2.99. This purchase grants lifetime access to the app and its features, with no additional subscriptions or API keys required.

### Can I share DeepThink with my family?

Yes, DeepThink supports Family Sharing, allowing you to share the app with up to six family members. This enables everyone to benefit from private, offline AI assistance.

### What devices is DeepThink available on?

DeepThink is compatible with iPhones and iPads. It is designed to run efficiently on these mobile devices.

### How often is DeepThink updated?

The app was last updated on February 27, 2025, with version 1.0.1. Future updates are planned to include additional AI models, faster performance, and editable context.

### What is the age rating for DeepThink?

DeepThink has an age rating of 4+, making it suitable for a wide range of users. The app's content and functionality are appropriate for this age group.

### What are the limitations of DeepThink?

While DeepThink excels as an offline and private thinking partner, it may occasionally make mistakes like any AI system. Users are encouraged to verify important information and are responsible for how they use the AI's output.

## Version history (last 2 releases)

### 1.0.1 — 2025-02-27

Fixed a critical issue with an updated AI model repository that prevented responses from appearing for some users.

### 1.0 — 2025-02-24

No release notes.

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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 2026-08-29.*