# O2WORLD vs Logma

The clearest difference is in-app purchases: O2WORLD at none against Logma's 2. O2WORLD also leads on iOS requirement (13.0 vs 17.6). Logma's advantage is update cadence (every 5 days vs every 7 months). On price, ads and device support there is nothing between them.

Both are free to download. Logma sells 2 in-app purchases, starting at $9.99 per month. O2WORLD asks for nothing beyond the download.

O2WORLD ships an update every 7 months, Logma every 5 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | O2WORLD | Logma |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 days** |
| Size | 46 MB | 24 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Muhammed Ustek](https://appshunter.io/developer/1676626335) | [Batuhan Buyukakkan](https://appshunter.io/developer/1896174700) |

## What reviewers say

### O2WORLD

[App page](https://appshunter.io/ios/app/o2world/id6446202504)

**Features:** macOS Compatibility

**In-app purchases:** none


### Logma

[App page](https://appshunter.io/ios/app/logma-ai-calorie-tracker/id6769829694)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $9.99 | per month |
| Pro Yearly | $49.99 | per year |


## Frequently asked questions

### Is O2WORLD free?

O2WORLD is free to download, with no in-app purchases.

### Is Logma free?

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

### Do O2WORLD or Logma have ads?

Neither O2WORLD nor Logma shows ads.

### Which is updated more often, O2WORLD or Logma?

O2WORLD ships an update every 7 months, and Logma every 5 days. Most recently, O2WORLD was updated on October 27, 2026 and Logma on October 31, 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.*