# TrainFlow vs Slim AI

The clearest difference is in-app purchases: TrainFlow at none against Slim AI's 3. TrainFlow also leads on ads (none vs shown). Slim AI's advantage is update cadence (weekly vs every 4 weeks) and iOS requirement (15.0 vs 18.0). On price and device support there is nothing between them.

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

TrainFlow ships an update every 4 weeks, Slim AI weekly. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | TrainFlow | Slim AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.8 (6 ratings)](https://appshunter.io/ios/app/slim-ai-calorie-tracker/id6753938721/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 56 MB | 83 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [THX IT Oy](https://appshunter.io/developer/1741943093) | [FUTURESOFT MAZUREK I NIEDZIELA SPOLKA KOMANDYTOWA](https://appshunter.io/developer/1836390860) |

## What reviewers say

### TrainFlow

[App page](https://appshunter.io/ios/app/trainflow-training-plans/id6744355617)

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

**In-app purchases:** none


### 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 (3)**

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


## Frequently asked questions

### Is TrainFlow free?

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

### Is Slim AI free?

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

### Do TrainFlow or Slim AI have ads?

Slim AI shows ads; TrainFlow does not.

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

TrainFlow ships an update every 4 weeks, and Slim AI weekly. Most recently, TrainFlow was updated on October 15, 2026 and Slim AI on October 10, 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.*