# A3S vs Abacus Trainer

The clearest difference is ads: A3S at none against Abacus Trainer's shown. A3S also leads on iOS requirement (13.0 vs 15.0). 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 2 weeks. The most recent releases landed on October 7, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | A3S | Abacus Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Size | 30 MB | 30 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Deccan Spark Technologies](https://appshunter.io/developer/1854388120) | [Doni Winata](https://appshunter.io/developer/6794313295) |

## What reviewers say

### A3S

[App page](https://appshunter.io/ios/app/a3s-student/id6778335848)

**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:** none


## Frequently asked questions

### Is A3S free?

A3S is free to download, with no in-app purchases.

### Is Abacus Trainer free?

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

### Do A3S or Abacus Trainer have ads?

Abacus Trainer shows ads; A3S does not.

### Which is updated more often, A3S or Abacus Trainer?

A3S ships an update every 2 weeks, and Abacus Trainer every 2 weeks. Most recently, A3S was updated on October 7, 2026 and Abacus Trainer on October 13, 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.*