# ChatPro4 vs On‑Device AI

The clearest difference is rating: ChatPro4 at 5.0 against On‑Device AI's 4.4. ChatPro4 also leads on iOS requirement (13.0 vs 18.0). On‑Device AI's advantage is ads (none vs shown) and ratings volume (163 vs 2). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. ChatPro4 sells 3 in-app purchases, starting at $4.99 per 7 days and On‑Device AI sells 4 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ChatPro4 holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: On‑Device AI has 163 ratings behind it against 2, so its average is the more settled of the two.

ChatPro4 ships an update every 3 weeks, On‑Device AI fortnightly. The most recent releases landed on October 17, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ChatPro4 | On‑Device AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/chatpro4-ai-chatbot/id6472479300/reviews)** | [4.4 (163 ratings)](https://appshunter.io/ios/app/ondevice-aiprivate-workspace/id6497060890/reviews) |
| Number of ratings | 2 | **163** |
| Positive reviews | — | 63.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 17 MB | 1.8 GB |
| Requires iOS | **13.0** | 18.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 12+ | 17+ |
| Developer | [Qijie Information](https://appshunter.io/developer/1717060398) | [Zijie Deng](https://appshunter.io/developer/1070117038) |

## What reviewers say

### ChatPro4

[App page](https://appshunter.io/ios/app/chatpro4-ai-chatbot/id6472479300)

Engage in natural conversations with an AI assistant for advice, information, and creative tasks. It offers writing assistance, translation, planning, and programming help, powered by an advanced AI model with vision and speech-to-text capabilities.

**Highlights:** Advanced AI model (4.0), Vision modeling for picture conversations, Speech-to-text for efficiency, Streaming output for reduced waiting, Role-playing and dialog scenarios, Contextualization and multi-line switching

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plus | $4.99 | per 7 days |
| Monthly Plus | $11.90 | per month |
| Annual Plus | $89.99 | per year |


### On‑Device AI

[App page](https://appshunter.io/ios/app/ondevice-aiprivate-workspace/id6497060890)

Transform your device into a private AI assistant for meetings and complex tasks. Features include speaker diarization, live transcription, and specialized subagents for research, analysis, and writing. Control your AI via messaging apps, with options for 100% offline processing or cloud connectivity.

**Highlights:** Speaker Diarization for meeting transcripts, Real-time live transcription, Natural AI speech generation, Deploy specialized AI subagents, AI-powered web browser automation, Control AI via messaging apps, 100% offline processing option

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Member Subscription | $3.99 | per month |
| Pro Member Subscription | $34.99 | per year |
| Lifetime Pro Member | $49.99 | one-time |
| Lifetime Pro Member | $99.99 | one-time |

**What reviewers like**

- 🚀 Game-changing AI assistant
- 🔍 Powerful search functionality
- 👍 Customizable and versatile
- 🌐 Seamless multi-device experience
- 💡 Innovative character-based interactions

**What reviewers complain about**

- 🐛 Crashes on larger models
- 🔋 Heating issues on some devices
- 🔍 Slow and unreliable web search
- 💻 Buggy on macOS

**Reported bugs**

- Crashes on startup
- Model selection issues
- Inability to copy generated text

**Requested features**

- Automated multi-character conversations
- Character set saving and syncing
- Streamlined search integration
- UI optimization for icons
- Remote endpoint support for multi-agents


## Frequently asked questions

### Is ChatPro4 free?

ChatPro4 is free to download, with in-app purchases available.

### Is On‑Device AI free?

On‑Device AI is free to download, with in-app purchases available.

### Which has better reviews, ChatPro4 or On‑Device AI?

ChatPro4 is rated higher. ChatPro4 averages 5.0 out of 5 from 2 ratings, while On‑Device AI averages 4.4 from 163 ratings.

### Do ChatPro4 or On‑Device AI have ads?

ChatPro4 shows ads; On‑Device AI does not.

### Which is updated more often, ChatPro4 or On‑Device AI?

ChatPro4 ships an update every 3 weeks, and On‑Device AI fortnightly. Most recently, ChatPro4 was updated on October 17, 2026 and On‑Device AI on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*