# 謎解き ㊙ 母の手紙 vs 危機イッパツ！

The clearest difference is rating: 危機イッパツ！ at 5.0 against 謎解き ㊙ 母の手紙's 3.7. 危機イッパツ！ also leads on update cadence (every 2 weeks vs every 2 months). 謎解き ㊙ 母の手紙's advantage is ads (none vs shown) and iOS requirement (9.0 vs 14.0). On price, ratings volume, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

危機イッパツ！ holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 9 and 4 respectively.

謎解き ㊙ 母の手紙 ships an update every 2 months, 危機イッパツ！ every 2 weeks. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | 謎解き ㊙ 母の手紙 | 危機イッパツ！ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (9 ratings)](https://appshunter.io/ios/app/id1367820006/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/id6465136997/reviews)** |
| Number of ratings | **9** | 4 |
| Positive reviews | 58.5% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 244 MB | 127 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [MIKU KURAKI](https://appshunter.io/developer/1161306102) | [GlobalGear Co. Ltd.](https://appshunter.io/developer/670168140) |

## What reviewers say

### 謎解き ㊙ 母の手紙

[App page](https://appshunter.io/ios/app/id1367820006)

Solve the mystery left behind in a letter from your mother. This challenging game presents a series of puzzles and riddles that you must decipher to progress. Perfect for when you have free time or need a break from studying.

**Highlights:** Solve mother's letter puzzles, Decipher riddles, Tap to answer, Progress through stages, Suitable for breaks

**Features:** macOS Compatibility

**In-app purchases:** none


### 危機イッパツ！

[App page](https://appshunter.io/ios/app/id6465136997)

**In-app purchases:** none


## Frequently asked questions

### Is 謎解き ㊙ 母の手紙 free?

謎解き ㊙ 母の手紙 is free to download, with no in-app purchases.

### Is 危機イッパツ！ free?

危機イッパツ！ is free to download, with no in-app purchases.

### Which has better reviews, 謎解き ㊙ 母の手紙 or 危機イッパツ！?

危機イッパツ！ is rated higher. 謎解き ㊙ 母の手紙 averages 3.7 out of 5 from 9 ratings, while 危機イッパツ！ averages 5.0 from 4 ratings.

### Do 謎解き ㊙ 母の手紙 or 危機イッパツ！ have ads?

危機イッパツ！ shows ads; 謎解き ㊙ 母の手紙 does not.

### Which is updated more often, 謎解き ㊙ 母の手紙 or 危機イッパツ！?

謎解き ㊙ 母の手紙 ships an update every 2 months, and 危機イッパツ！ every 2 weeks. Most recently, 謎解き ㊙ 母の手紙 was updated on October 21, 2026 and 危機イッパツ！ on October 20, 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.*