# FogX vs Brain training calculator

The clearest difference is ads: FogX at none against Brain training calculator's shown. FogX also leads on iOS requirement (12.0 vs 15.8.3). Brain training calculator's advantage is update cadence (every 2 weeks vs every 11 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

FogX ships an update every 11 months, Brain training calculator every 2 weeks. The most recent releases landed on October 6, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | FogX | Brain training calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Every 2 weeks** |
| Size | 2 MB | 35 MB |
| Requires iOS | **12.0** | 15.8.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mehmet Gokhan Eryanik](https://appshunter.io/developer/1458483327) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### FogX

[App page](https://appshunter.io/ios/app/fogx/id1458483328)

**Features:** macOS Compatibility

**In-app purchases:** none


### Brain training calculator

[App page](https://appshunter.io/ios/app/brain-training-calculator/id6502152942)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FogX free?

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

### Is Brain training calculator free?

Brain training calculator is free to download, with no in-app purchases.

### Do FogX or Brain training calculator have ads?

Brain training calculator shows ads; FogX does not.

### Which is updated more often, FogX or Brain training calculator?

FogX ships an update every 11 months, and Brain training calculator every 2 weeks. Most recently, FogX was updated on October 6, 2026 and Brain training calculator on October 20, 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.*