# chat4000 vs Otti ai

The clearest difference is in-app purchases: chat4000 at none against Otti ai's 8. Otti ai's advantage is update cadence (every 2 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Otti ai sells 8 in-app purchases, starting at $19.99 per month. chat4000 asks for nothing beyond the download.

chat4000 ships an update fortnightly, Otti ai every 2 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | chat4000 | Otti ai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Size | 59 MB | 145 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, Mac** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [NeonNode](https://appshunter.io/developer/1895319084) | [Raz Noiman](https://appshunter.io/developer/6786263677) |

## What reviewers say

### chat4000

[App page](https://appshunter.io/ios/app/chat4000/id6763445283)

**In-app purchases:** none


### Otti ai

[App page](https://appshunter.io/ios/app/otti-ai/id6786263675)

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Otti Pro | $19.99 | per month |
| Otti Business 25 | $150.00 | per month |
| Otti Unlimited | $200.00 | per month |
| Otti Business 50 | $250.00 | per month |
| Otti Business 120 | $500.00 | per month |
| Otti credit 10 | $10.00 | one-time |
| Otti credit 20 | $20.00 | one-time |
| Otti credit 50 | $50.00 | one-time |


## Frequently asked questions

### Is chat4000 free?

chat4000 is free to download, with no in-app purchases.

### Is Otti ai free?

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

### Do chat4000 or Otti ai have ads?

Neither chat4000 nor Otti ai shows ads.

### Which is updated more often, chat4000 or Otti ai?

chat4000 ships an update fortnightly, and Otti ai every 2 days. Most recently, chat4000 was updated on October 24, 2026 and Otti ai on October 31, 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.*