# AI Calorie Tracker vs Athlen

The clearest difference is ads: Athlen at none against AI Calorie Tracker's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. AI Calorie Tracker sells 3 in-app purchases, starting at $3.99 per 7 days and Athlen sells 1 in-app purchase, starting at $33.99 per year. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | AI Calorie Tracker | Athlen |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 81.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 105 MB | 46 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Centaurio UG (haftungsbeschrankt)](https://appshunter.io/developer/1819453943) | [Katharina Weiser](https://appshunter.io/developer/1832051322) |

## What reviewers say

### AI Calorie Tracker

[App page](https://appshunter.io/ios/app/ai-calorie-tracker-kairo/id6756936526)

Effortlessly track your meals by simply taking a photo. This AI-powered app instantly identifies ingredients, calculates calories and macros, and visualizes their impact on your body's systems. Set personalized goals and connect with friends for added motivation.

**Highlights:** AI-powered photo meal scanning, Instant calorie and macro breakdown, Body Map nutrition visualization, Personalized goal setting, Track with friends feature, Apple Health and Watch integration

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kairo Unlimited Weekly | $3.99 | per 7 days |
| Kairo Unlimited — 50% Off | $22.99 | per year |
| Kairo Unlimited Yearly | $44.99 | per year |


### Athlen

[App page](https://appshunter.io/ios/app/athlen/id6770023053)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Athlen Pro | $33.99 | per year |


## Frequently asked questions

### Is AI Calorie Tracker free?

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

### Is Athlen free?

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

### Do AI Calorie Tracker or Athlen have ads?

AI Calorie Tracker shows ads; Athlen does not.

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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.*