# Fasten vs Nut AI

The clearest difference is in-app purchases: Fasten at none against Nut AI's 3. Nut AI's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Nut AI sells 3 in-app purchases, starting at $9.99 per month. Fasten asks for nothing beyond the download.

Fasten ships an update every 2 months, Nut AI every 3 weeks. The most recent releases landed on October 16, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Fasten | Nut AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/nut-ai-calorie-tracker/id6787329354/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 37 MB | 83 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yoel Mebrahtu](https://appshunter.io/developer/1886822133) | [Singhi Jaswanth Reddy](https://appshunter.io/developer/6787329356) |

## What reviewers say

### Fasten

[App page](https://appshunter.io/ios/app/fasten-fasting-tracker/id6760921042)

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

**In-app purchases:** none


### Nut AI

[App page](https://appshunter.io/ios/app/nut-ai-calorie-tracker/id6787329354)

Effortlessly track your diet and fitness goals by simply taking a photo of your meals. This intelligent companion analyzes your food, provides accurate calorie and macro breakdowns, and integrates with health platforms to adjust your targets based on activity.

**Highlights:** AI Meal Scanner, Smart Macro Tracking, Apple Health Integration, Hydration Tracking, Progress Streaks

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nut AI Monthly Plan | $9.99 | per month |
| Nut AI Annual (Special Offer) | $29.99 | per year |
| Nut AI Yearly Plan | $39.99 | per year |


## Frequently asked questions

### Is Fasten free?

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

### Is Nut AI free?

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

### Do Fasten or Nut AI have ads?

Neither Fasten nor Nut AI shows ads.

### Which is updated more often, Fasten or Nut AI?

Fasten ships an update every 2 months, and Nut AI every 3 weeks. Most recently, Fasten was updated on October 16, 2026 and Nut AI on October 28, 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.*