# Stephen AI vs DIET 2026

The clearest difference is in-app purchases: DIET 2026 at none against Stephen AI's 2. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Stephen AI sells 2 in-app purchases, starting at $9.99 per month. DIET 2026 asks for nothing beyond the download.

## The numbers

| Metric | Stephen AI | DIET 2026 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 days | — |
| Size | 63 MB | 61 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Prabhjot Singh](https://appshunter.io/developer/6800407972) | [Canadian Nuclear Society](https://appshunter.io/developer/1566632045) |

## What reviewers say

### Stephen AI

[App page](https://appshunter.io/ios/app/stephen-ai-smart-study-tutor/id6800407970)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stephen Pro Monthly | $9.99 | per month |
| Stephen Pro Yearly | $71.90 | per year |


### DIET 2026

[App page](https://appshunter.io/ios/app/diet-2026/id6816119746)

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Stephen AI free?

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

### Is DIET 2026 free?

DIET 2026 is free to download, with no in-app purchases.

### Do Stephen AI or DIET 2026 have ads?

Neither Stephen AI nor DIET 2026 shows ads.

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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.*