# Fast MathB vs My Safe Prison

The clearest difference is ads: Fast MathB at none against My Safe Prison's shown. Fast MathB also leads on update cadence (every 6 days vs every 3 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 My Safe Prison sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Fast MathB ships an update every 6 days, My Safe Prison every 3 weeks. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Fast MathB | My Safe Prison |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (784 ratings)](https://appshunter.io/ios/app/my-safe-prison-epic-guardian/id6477376116/reviews)** |
| Number of ratings | — | **784** |
| Positive reviews | — | 45.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 days** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 153 MB | 231 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) | [UDO GAMES OYUN YAZILIM ANONIM SIRKETI](https://appshunter.io/developer/944939988) |

## 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 |


### My Safe Prison

[App page](https://appshunter.io/ios/app/my-safe-prison-epic-guardian/id6477376116)

Step into the role of a prison manager in this simulation game. Build new cell blocks, manage inmates, upgrade facilities, and earn money to expand your prison empire. Strategically plan and maintain order to rise to the top.

**Highlights:** Build new cell blocks, Manage inmates strategically, Upgrade facilities, Earn money systematically, Develop prison empire, Monitor inmate stress levels

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Handful of Gems | $0.99 | one-time |
| Pile of Gems | $3.99 | one-time |
| Stash of Gems | $6.99 | one-time |
| No Ads Pack | $9.99 | one-time |
| Bag of gems | $9.99 | one-time |
| 350 Gems | $19.99 | one-time |
| 600 Gems | $29.99 | one-time |

**What reviewers like**

- 👍 Fun game
- 👍 Amazing app

**What reviewers complain about**

- 🐛 Ads on a timer, can't play offline
- 🐛 Game is super slow
- 🐛 Short timing for activities
- 🐛 Can't get past level 4

**Reported bugs**

- Can't advance past level 4
- Facilities can't be upgraded after level 4

**Requested features**

- Make a sequel called 'My Safe Prison 2' where we can fight as prisoners
- Add 1-on-1 or gang fights, not just group fights
- Allow permanent hiring of helpers instead of 10-minute increments


## Frequently asked questions

### Is Fast MathB free?

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

### Is My Safe Prison free?

My Safe Prison is free to download, with in-app purchases available.

### Do Fast MathB or My Safe Prison have ads?

My Safe Prison shows ads; Fast MathB does not.

### Which is updated more often, Fast MathB or My Safe Prison?

Fast MathB ships an update every 6 days, and My Safe Prison every 3 weeks. Most recently, Fast MathB was updated on October 24, 2026 and My Safe Prison on October 23, 2026.

---

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