# Controller Diagnostics vs AI Chat

The clearest difference is in-app purchases: Controller Diagnostics at none against AI Chat's 3. Controller Diagnostics also leads on ads (none vs shown). AI Chat's advantage is update cadence (every 8 days vs every 5 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. AI Chat sells 3 in-app purchases, starting at $3.99 per 7 days. Controller Diagnostics asks for nothing beyond the download.

Controller Diagnostics ships an update every 5 weeks, AI Chat every 8 days. The most recent releases landed on October 4, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Controller Diagnostics | AI Chat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (2 ratings)](https://appshunter.io/ios/app/ai-chat-chat-assistant/id6446834003/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 2 MB | 8 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Lykketronic AS](https://appshunter.io/developer/1297619408) | [Linh Dan Le](https://appshunter.io/developer/1678924251) |

## What reviewers say

### Controller Diagnostics

[App page](https://appshunter.io/ios/app/controller-diagnostics/id6444090201)

**Features:** Vision Pro support

**In-app purchases:** none


### AI Chat

[App page](https://appshunter.io/ios/app/ai-chat-chat-assistant/id6446834003)

Engage in conversations, get quick answers to any question, and improve your writing with real-time feedback. This AI-powered tool supports all languages and offers diverse topics for learning and discussion.

**Highlights:** Ask any question, AI Writing Assistant, Voice chat with AI, Supports all languages, Various talking topics

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Chats Weekly | $3.99 | per 7 days |
| Unlimited Chats Monthly | $9.99 | per month |
| Unlimited Chats Yearly | $79.99 | per year |


## Frequently asked questions

### Is Controller Diagnostics free?

Controller Diagnostics is free to download, with no in-app purchases.

### Is AI Chat free?

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

### Do Controller Diagnostics or AI Chat have ads?

AI Chat shows ads; Controller Diagnostics does not.

### Which is updated more often, Controller Diagnostics or AI Chat?

Controller Diagnostics ships an update every 5 weeks, and AI Chat every 8 days. Most recently, Controller Diagnostics was updated on October 4, 2026 and AI Chat on October 14, 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.*