# Slim AI vs Fit75

The clearest difference is rating: Fit75 at 4.6 against Slim AI's 3.8. Fit75 also leads on ratings volume (91 vs 6). Slim AI's advantage is iOS requirement (15.0 vs 26.0). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Slim AI sells 4 in-app purchases, starting at $9.99 per month and Fit75 sells 7 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Fit75 holds the better App Store score, 4.6 against 3.8. That said, the two scores are not equally well evidenced: Fit75 has 91 ratings behind it against 6, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Slim AI ships an update every 8 days, Fit75 weekly. Both last shipped on October 26, 2026.

## The numbers

| Metric | Slim AI | Fit75 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (6 ratings)](https://appshunter.io/ios/app/slim-ai-calorie-tracker/id6753938721/reviews) | **[4.6 (91 ratings)](https://appshunter.io/ios/app/fit75-challenge-tracker/id6755432811/reviews)** |
| Number of ratings | 6 | **91** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 8 days | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 85 MB | 292 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [FUTURESOFT MAZUREK I NIEDZIELA SPOLKA KOMANDYTOWA](https://appshunter.io/developer/1836390860) | [World United Studios Limited](https://appshunter.io/developer/1604720515) |

## What reviewers say

### Slim AI

[App page](https://appshunter.io/ios/app/slim-ai-calorie-tracker/id6753938721)

Analyze meals from photos to understand their nutritional impact, including calories and macronutrients. Track activity, hydration, and fasting with personalized goal setting and health score evaluations. Sync data with health apps for a comprehensive overview of your well-being.

**Highlights:** Photo-based meal analysis, Calorie and macronutrient breakdown, Health Score for ingredient quality, Food label scanning, Personalized meal suggestions, Activity, hydration, and fasting tracking, Health app integration

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $9.99 | per month |
| App Access | $22.99 | per year |
| App Access | $24.99 | per year |
| Annual Plan | $34.99 | per year |


### Fit75

[App page](https://appshunter.io/ios/app/fit75-challenge-tracker/id6755432811)

This AI-powered fitness coach offers personalized workouts, instant meal tracking via photo, and body composition analysis. It provides 24/7 AI coaching for nutrition and fitness advice, helping users achieve their health goals without needing multiple apps.

**Highlights:** AI coaching and nutrition advice, Customizable workouts by duration, intensity, and equipment, Instant meal logging with photo analysis, Body composition analysis with selfie, FitDad Score for fitness ranking, Progress tracking charts

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fit75 Unlimited | $7.99 | per 7 days |
| FitDad Unlimited | $14.99 | per month |
| FitDad Unlimited | $19.99 | per month |
| Fit75 Unlimited | $47.99 | per year |
| FitDad Unlimited | $47.99 | per year |
| FitDad Unlimited | $59.99 | per year |
| FitDad Unlimited | $79.99 | per year |


## Frequently asked questions

### Is Slim AI free?

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

### Is Fit75 free?

Fit75 is free to download, with in-app purchases available.

### Which has better reviews, Slim AI or Fit75?

Fit75 is rated higher. Slim AI averages 3.8 out of 5 from 6 ratings, while Fit75 averages 4.6 from 91 ratings.

### Do Slim AI or Fit75 have ads?

Both Slim AI and Fit75 show ads.

### Which is updated more often, Slim AI or Fit75?

Slim AI ships an update every 8 days, and Fit75 weekly. Most recently, Slim AI was updated on October 26, 2026 and Fit75 on October 26, 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.*