# Memory Brain Trainer (Math) vs Countries Quiz Trivia

The clearest difference is ads: Memory Brain Trainer (Math) at none against Countries Quiz Trivia's shown. Memory Brain Trainer (Math) also leads on iOS requirement (6.0 vs 12.0). On price, update cadence, 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.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Memory Brain Trainer (Math) | Countries Quiz Trivia |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | Every 3 months |
| Size | 57 MB | 56 MB |
| Requires iOS | **6.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KIDEO TECH LTD](https://appshunter.io/developer/905104364) | [Blue Castle Studios](https://appshunter.io/developer/1465237858) |

## What reviewers say

### Memory Brain Trainer (Math)

[App page](https://appshunter.io/ios/app/memory-brain-trainer-math/id1020432770)

**Features:** macOS Compatibility

**In-app purchases:** none


### Countries Quiz Trivia

[App page](https://appshunter.io/ios/app/countries-quiz-trivia/id6451093663)

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

**In-app purchases:** none


## Frequently asked questions

### Is Memory Brain Trainer (Math) free?

Memory Brain Trainer (Math) is free to download, with no in-app purchases.

### Is Countries Quiz Trivia free?

Countries Quiz Trivia is free to download, with no in-app purchases.

### Do Memory Brain Trainer (Math) or Countries Quiz Trivia have ads?

Countries Quiz Trivia shows ads; Memory Brain Trainer (Math) does not.

### Which is updated more often, Memory Brain Trainer (Math) or Countries Quiz Trivia?

Memory Brain Trainer (Math) ships an update every 3 months, and Countries Quiz Trivia every 3 months. Most recently, Memory Brain Trainer (Math) was updated on October 14, 2026 and Countries Quiz Trivia on October 8, 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.*