# Flash Anzan & Memory vs Abacus

The clearest difference is in-app purchases: Abacus at none against Flash Anzan & Memory's 1. Flash Anzan & Memory's advantage is ads (none vs shown) and iOS requirement (15.1 vs 26). On price, update cadence and device support there is nothing between them.

Both are free to download. Flash Anzan & Memory sells 1 one-off in-app purchase. Abacus asks for nothing beyond the download.

Flash Anzan & Memory ships an update every 11 days, Abacus every 10 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Flash Anzan & Memory | Abacus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 11 days | **Every 10 days** |
| Size | 56 MB | 19 MB |
| Requires iOS | **15.1** | 26 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Ryota Ogiwara](https://appshunter.io/developer/6789401368) | [Aleksandr Govorukhin](https://appshunter.io/developer/1729392672) |

## What reviewers say

### Flash Anzan & Memory

[App page](https://appshunter.io/ios/app/flash-anzan-and-memory-pikapara/id6805305094)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pikapara Pro | $5.99 | one-time |


### Abacus

[App page](https://appshunter.io/ios/app/abacus-mental-arithmetic/id6819154039)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Flash Anzan & Memory free?

Flash Anzan & Memory is free to download, with in-app purchases available.

### Is Abacus free?

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

### Do Flash Anzan & Memory or Abacus have ads?

Abacus shows ads; Flash Anzan & Memory does not.

### Which is updated more often, Flash Anzan & Memory or Abacus?

Flash Anzan & Memory ships an update every 11 days, and Abacus every 10 days. Most recently, Flash Anzan & Memory was updated on October 31, 2026 and Abacus on November 6, 2026.

---

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