# Calog vs FitLogOS

The clearest difference is in-app purchases: FitLogOS at none against Calog's 21. Calog's advantage is iOS requirement (15.1 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Calog sells 17 in-app purchases, starting at $9.99 per month. FitLogOS asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 30, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Calog | FitLogOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (50 ratings)](https://appshunter.io/ios/app/calog-calorie-macro-tracker/id6755748205/reviews)** | — |
| Number of ratings | **50** | — |
| Positive reviews | 80.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | Free with in-app purchases | — |
| Size | 135 MB | 3 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gymwork Inc.](https://appshunter.io/developer/1498721516) | [Taisuke Goto](https://appshunter.io/developer/1834029625) |

## What reviewers say

### Calog

[App page](https://appshunter.io/ios/app/calog-calorie-macro-tracker/id6755748205)

This app uses AI-powered food scanning and science-backed nutrition principles to help you log meals quickly, track calories and macros accurately, and build healthy habits. It offers personalized guidance and adapts to your goals for effective weight management or muscle gain.

**Highlights:** AI food scanning with photo logging, Barcode and label scanner, Natural language manual meal logging, Detailed calorie and macro breakdowns, Personalized macro plan and guidance, Weight trend visualization, Flexible timeline meal logging

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

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calog PRO | $9.99 | per month |
| Exclusive  Calog Pro 6 Months | $12.49 | per 6 months |
| Calog Pro Weekly | $19.99 | per 7 days |
| Eligible Only  Calog PRO | $19.99 | per year |
| Exclusive  Calog Pro 1 Year | $22.49 | per year |
| Eligible Only  Calog PRO | $29.99 | per year |
| Calog PRO | $29.99 | per 3 months |
| Eligible Only  Calog PRO | $33.99 | per year |
| Eligible Only  Calog PRO | $39.00 | per year |
| Eligible Only  Calog PRO | $39.99 | per year |
| Calog PRO | $39.99 | per year |
| Eligible Only  Calog PRO | $49.99 | per year |
| Calog PRO | $59.99 | per year |
| Calog PRO | $69.99 | per year |
| Calog PRO | $78.00 | per year |
| Calog PRO | $79.99 | per year |
| Calog PRO | $99.99 | per year |


### FitLogOS

[App page](https://appshunter.io/ios/app/fitlogos/id6781057580)

**In-app purchases:** none


## Frequently asked questions

### Is Calog free?

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

### Is FitLogOS free?

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

### Do Calog or FitLogOS have ads?

Neither Calog nor FitLogOS shows ads.

### Which is updated more often, Calog or FitLogOS?

Calog ships an update every 4 days, and FitLogOS every 4 days. Most recently, Calog was updated on October 30, 2026 and FitLogOS on October 5, 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.*