# Reverse one digit multiplication tADa vs Kioku?：Number Memory

The clearest difference is in-app purchases: Reverse one digit multiplication tADa at none against Kioku?：Number Memory's 1. Reverse one digit multiplication tADa also leads on iOS requirement (8.0 vs 17.0). Kioku?：Number Memory's advantage is update cadence (every 2 days vs every 9 months). On price, ads and device support there is nothing between them.

Both are free to download. Kioku?：Number Memory sells 1 one-off in-app purchase. Reverse one digit multiplication tADa asks for nothing beyond the download.

Reverse one digit multiplication tADa ships an update every 9 months, Kioku?：Number Memory every 2 days. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Reverse one digit multiplication tADa | Kioku?：Number Memory |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 days** |
| Size | 4 MB | 7 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Currach Software](https://appshunter.io/developer/315759561) | [Yuichi Hiruta](https://appshunter.io/developer/912365793) |

## What reviewers say

### Reverse one digit multiplication tADa

[App page](https://appshunter.io/ios/app/reverse-one-digit-multiplication-tada/id483001832)

**Features:** macOS Compatibility

**In-app purchases:** none


### Kioku?：Number Memory

[App page](https://appshunter.io/ios/app/kiokunumber-memory/id6782825314)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Reverse one digit multiplication tADa free?

Reverse one digit multiplication tADa is free to download, with no in-app purchases.

### Is Kioku?：Number Memory free?

Kioku?：Number Memory is free to download, with in-app purchases available.

### Do Reverse one digit multiplication tADa or Kioku?：Number Memory have ads?

Neither Reverse one digit multiplication tADa nor Kioku?：Number Memory shows ads.

### Which is updated more often, Reverse one digit multiplication tADa or Kioku?：Number Memory?

Reverse one digit multiplication tADa ships an update every 9 months, and Kioku?：Number Memory every 2 days. Most recently, Reverse one digit multiplication tADa was updated on October 26, 2026 and Kioku?：Number Memory on October 25, 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.*