# Hazard buster vs MMS生徒手帳

Hazard buster and MMS生徒手帳 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. Neither carries in-app purchases, so what you see is what you pay.

Hazard buster ships an update every 3 months, MMS生徒手帳 every 2 months. The most recent releases landed on October 9, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Hazard buster | MMS生徒手帳 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 93 MB | 62 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [J-FRONTIER CO.,LTD.](https://appshunter.io/developer/1460077443) | [MMS JAPAN Ltd.](https://appshunter.io/developer/1566276223) |

## What reviewers say

### Hazard buster

[App page](https://appshunter.io/ios/app/hazard-buster/id1460077444)

**In-app purchases:** none


### MMS生徒手帳

[App page](https://appshunter.io/ios/app/mms/id1566276221)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Hazard buster free?

Hazard buster is free to download, with no in-app purchases.

### Is MMS生徒手帳 free?

MMS生徒手帳 is free to download, with no in-app purchases.

### Do Hazard buster or MMS生徒手帳 have ads?

Neither Hazard buster nor MMS生徒手帳 shows ads.

### Which is updated more often, Hazard buster or MMS生徒手帳?

Hazard buster ships an update every 3 months, and MMS生徒手帳 every 2 months. Most recently, Hazard buster was updated on October 9, 2026 and MMS生徒手帳 on October 3, 2026.

---

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