# ガチ素因数分解 vs PRIME DROP

The clearest difference is rating: PRIME DROP at 5.0 against ガチ素因数分解's 4.6. ガチ素因数分解's advantage is ratings volume (23 vs 1) and device support (3 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. ガチ素因数分解 sells 5 one-off in-app purchases and PRIME DROP sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

PRIME DROP holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: ガチ素因数分解 has 23 ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | ガチ素因数分解 | PRIME DROP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (23 ratings)](https://appshunter.io/ios/app/id1480561747/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/prime-drop/id6805800981/reviews)** |
| Number of ratings | **23** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 100 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Chikai Ito](https://appshunter.io/developer/1480561746) | [KANTA KOKONNO](https://appshunter.io/developer/6800746480) |

## What reviewers say

### ガチ素因数分解

[App page](https://appshunter.io/ios/app/id1480561747)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| コイン150枚 | $0.99 | one-time |
| コイン400枚 | $1.99 | one-time |
| コイン1000枚 | $2.99 | one-time |
| 広告削除 | $4.99 | one-time |
| コイン2700枚 | $6.99 | one-time |


### PRIME DROP

[App page](https://appshunter.io/ios/app/prime-drop/id6805800981)

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

**In-app purchases (1)**

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


## Frequently asked questions

### Is ガチ素因数分解 free?

ガチ素因数分解 is free to download, with in-app purchases available.

### Is PRIME DROP free?

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

### Which has better reviews, ガチ素因数分解 or PRIME DROP?

PRIME DROP is rated higher. ガチ素因数分解 averages 4.6 out of 5 from 23 ratings, while PRIME DROP averages 5.0 from 1 ratings.

### Do ガチ素因数分解 or PRIME DROP have ads?

Both ガチ素因数分解 and PRIME DROP show ads.

### Which is updated more often, ガチ素因数分解 or PRIME DROP?

ガチ素因数分解 ships an update every 3 weeks, and PRIME DROP every 3 weeks. Most recently, ガチ素因数分解 was updated on November 3, 2026 and PRIME DROP on November 6, 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.*