# Visualization Training vs Shikirei

The clearest difference is update cadence: Shikirei at every 2 days against Visualization Training's weekly. Shikirei also leads on iOS requirement (17.0 vs 26.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Visualization Training sells 1 one-off in-app purchase and Shikirei sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Visualization Training ships an update weekly, Shikirei every 2 days. The most recent releases landed on November 5, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | Visualization Training | Shikirei |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Size | 21 MB | 103 MB |
| Requires iOS | 26.4 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shingo Fukuyama](https://appshunter.io/developer/917557248) | [SNAPLACE](https://appshunter.io/developer/6790258232) |

## What reviewers say

### Visualization Training

[App page](https://appshunter.io/ios/app/visualization-training/id6788350226)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | one-time |


### Shikirei

[App page](https://appshunter.io/ios/app/shikirei-math-formula-puzzle/id6802468634)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all layers | $2.99 | one-time |


## Frequently asked questions

### Is Visualization Training free?

Visualization Training is free to download, with in-app purchases available.

### Is Shikirei free?

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

### Do Visualization Training or Shikirei have ads?

Neither Visualization Training nor Shikirei shows ads.

### Which is updated more often, Visualization Training or Shikirei?

Visualization Training ships an update weekly, and Shikirei every 2 days. Most recently, Visualization Training was updated on November 5, 2026 and Shikirei on November 11, 2026.

---

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