# Flash Mental Calc vs Abacus Trainer

The clearest difference is in-app purchases: Flash Mental Calc at none against Abacus Trainer's 1. Flash Mental Calc also leads on ads (none vs shown). Abacus Trainer's advantage is iOS requirement (15.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Abacus Trainer sells 1 one-off in-app purchase. Flash Mental Calc asks for nothing beyond the download.

## The numbers

| Metric | Flash Mental Calc | Abacus Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Fortnightly |
| Size | 5 MB | 31 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Wenbo Chen](https://appshunter.io/developer/1884329176) | [Doni Winata](https://appshunter.io/developer/6794313295) |

## What reviewers say

### Flash Mental Calc

[App page](https://appshunter.io/ios/app/flash-mental-calc/id6760411165)

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

**In-app purchases:** none


### Abacus Trainer

[App page](https://appshunter.io/ios/app/abacus-trainer-mental-math/id6794313293)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is Flash Mental Calc free?

Flash Mental Calc is free to download, with no in-app purchases.

### Is Abacus Trainer free?

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

### Do Flash Mental Calc or Abacus Trainer have ads?

Abacus Trainer shows ads; Flash Mental Calc does not.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*