# 99 More vs 瞬間素因数分解 Prime Factorization

The clearest difference is in-app purchases: 99 More at none against 瞬間素因数分解 Prime Factorization's 1. 99 More also leads on iOS requirement (15.6 vs 17.0). 瞬間素因数分解 Prime Factorization's advantage is update cadence (weekly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. 瞬間素因数分解 Prime Factorization sells 1 one-off in-app purchase. 99 More asks for nothing beyond the download.

99 More ships an update every 2 months, 瞬間素因数分解 Prime Factorization weekly. The most recent releases landed on September 9, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | 99 More | 瞬間素因数分解 Prime Factorization |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Size | 32 MB | 3 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DAISUKE MATSUYOSHI](https://appshunter.io/developer/1545916488) | [YUSUKE MIZUNO](https://appshunter.io/developer/1729948508) |

## What reviewers say

### 99 More

[App page](https://appshunter.io/ios/app/99-more-app-for-mental-math/id6446323889)

**Features:** macOS Compatibility

**In-app purchases:** none


### 瞬間素因数分解 Prime Factorization

[App page](https://appshunter.io/ios/app/prime-factorization/id6478605149)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ad | $1.99 | one-time |


## Frequently asked questions

### Is 99 More free?

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

### Is 瞬間素因数分解 Prime Factorization free?

瞬間素因数分解 Prime Factorization is free to download, with in-app purchases available.

### Do 99 More or 瞬間素因数分解 Prime Factorization have ads?

Both 99 More and 瞬間素因数分解 Prime Factorization show ads.

### Which is updated more often, 99 More or 瞬間素因数分解 Prime Factorization?

99 More ships an update every 2 months, and 瞬間素因数分解 Prime Factorization weekly. Most recently, 99 More was updated on September 9, 2026 and 瞬間素因数分解 Prime Factorization on September 21, 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.*