# Slim AI vs EchoCal

The clearest difference is update cadence: Slim AI at every 8 days against EchoCal's every 3 weeks. Slim AI also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases 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 and EchoCal sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Slim AI ships an update every 8 days, EchoCal every 3 weeks. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Slim AI | EchoCal |
| --- | --- | --- |
| 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 | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 8 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 85 MB | 49 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [FUTURESOFT MAZUREK I NIEDZIELA SPOLKA KOMANDYTOWA](https://appshunter.io/developer/1836390860) | [JAKUB PIGIEL](https://appshunter.io/developer/1890632501) |

## 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 (3)**

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


### EchoCal

[App page](https://appshunter.io/ios/app/echocal/id6761645536)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EchoCal Premium | $3.99 | per month |
| EchoCal Premium | $29.99 | per year |


## Frequently asked questions

### Is Slim AI free?

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

### Is EchoCal free?

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

### Do Slim AI or EchoCal have ads?

Both Slim AI and EchoCal show ads.

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

Slim AI ships an update every 8 days, and EchoCal every 3 weeks. Most recently, Slim AI was updated on October 25, 2026 and EchoCal on October 11, 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.*