# Fast MathB vs Gonggi Drop

The clearest difference is ads: Fast MathB at none against Gonggi Drop's shown. Fast MathB also leads on update cadence (every 6 days vs every 6 weeks) and iOS requirement (12.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Fast MathB sells 5 one-off in-app purchases and Gonggi Drop sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Fast MathB ships an update every 6 days, Gonggi Drop every 6 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Fast MathB | Gonggi Drop |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 days** | Every 6 weeks |
| Size | 153 MB | 219 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Salih Hamouda](https://appshunter.io/developer/1564178940) | [Smelly Cat](https://appshunter.io/developer/1775690833) |

## What reviewers say

### Fast MathB

[App page](https://appshunter.io/ios/app/fast-mathb/id6447488960)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| pack1 | $0.99 | one-time |
| vip1 | $0.99 | one-time |
| pack3 | $2.99 | one-time |
| vip3 | $2.99 | one-time |
| pack5 | $4.99 | one-time |


### Gonggi Drop

[App page](https://appshunter.io/ios/app/gonggi-drop/id6741038649)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is Fast MathB free?

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

### Is Gonggi Drop free?

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

### Do Fast MathB or Gonggi Drop have ads?

Gonggi Drop shows ads; Fast MathB does not.

### Which is updated more often, Fast MathB or Gonggi Drop?

Fast MathB ships an update every 6 days, and Gonggi Drop every 6 weeks. Most recently, Fast MathB was updated on November 3, 2026 and Gonggi Drop on October 30, 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.*