# 99 Math Animals vs ISTQB Usability Testing

99 Math Animals and ISTQB Usability Testing are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. 99 Math Animals sells 4 one-off in-app purchases and ISTQB Usability Testing sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 99 Math Animals | ISTQB Usability Testing |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 131 MB | 9 MB |
| Requires iOS | **16.0** | 17.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Michal Cilindz](https://appshunter.io/developer/1538354890) | [Cargo Teleport Inc](https://appshunter.io/developer/1761832181) |

## What reviewers say

### 99 Math Animals

[App page](https://appshunter.io/ios/app/99-math-animals-numbers-kids/id6478800575)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1000 Coins Pile | $2.99 | one-time |
| Unlimited Hearts | $4.99 | one-time |
| 3000 Coins Bag | $5.99 | one-time |
| 6000 Coins Chest | $9.99 | one-time |


### ISTQB Usability Testing

[App page](https://appshunter.io/ios/app/istqb-usability-testing/id6738763542)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly subscription | $9.99 | per month |
| Lifetime version | $19.99 | one-time |


## Frequently asked questions

### Is 99 Math Animals free?

99 Math Animals is free to download, with in-app purchases available.

### Is ISTQB Usability Testing free?

ISTQB Usability Testing is free to download, with in-app purchases available.

### Do 99 Math Animals or ISTQB Usability Testing have ads?

Neither 99 Math Animals nor ISTQB Usability Testing shows ads.

### Which is updated more often, 99 Math Animals or ISTQB Usability Testing?

99 Math Animals ships an update every 3 weeks, and ISTQB Usability Testing every 3 weeks. Most recently, 99 Math Animals was updated on October 11, 2026 and ISTQB Usability Testing on October 7, 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.*