# 大人のなぞなぞ 2~暇つぶし脳トレIQアプリ~ vs Sound Collision

The clearest difference is iOS requirement: Sound Collision at 12.0 against 大人のなぞなぞ 2~暇つぶし脳トレIQアプリ~'s 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 10 days. The most recent releases landed on November 2, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | 大人のなぞなぞ 2~暇つぶし脳トレIQアプリ~ | Sound Collision |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/2iq/id1115273015/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 41.4% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 10 days | Every 10 days |
| Monetization | Ad-supported | — |
| Size | 12 MB | 34 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ikue Konno](https://appshunter.io/developer/971968281) | [Takahisa Shindo](https://appshunter.io/developer/1820183909) |

## What reviewers say

### 大人のなぞなぞ 2~暇つぶし脳トレIQアプリ~

[App page](https://appshunter.io/ios/app/2iq/id1115273015)

A brain training app designed for adults to sharpen their minds with a variety of riddles. It offers 100 questions ranging from easy to challenging, perfect for passing the time and stimulating your intellect.

**Highlights:** Brain training for adults, 100 riddle questions, Varied difficulty levels, IQ and cipher quizzes, Time-killing entertainment

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

**In-app purchases:** none


### Sound Collision

[App page](https://appshunter.io/ios/app/sound-collision/id6753702415)

**In-app purchases:** none


## Frequently asked questions

### Is 大人のなぞなぞ 2~暇つぶし脳トレIQアプリ~ free?

大人のなぞなぞ 2~暇つぶし脳トレIQアプリ~ is free to download, with no in-app purchases.

### Is Sound Collision free?

Sound Collision is free to download, with no in-app purchases.

### Do 大人のなぞなぞ 2~暇つぶし脳トレIQアプリ~ or Sound Collision have ads?

Both 大人のなぞなぞ 2~暇つぶし脳トレIQアプリ~ and Sound Collision show ads.

### Which is updated more often, 大人のなぞなぞ 2~暇つぶし脳トレIQアプリ~ or Sound Collision?

大人のなぞなぞ 2~暇つぶし脳トレIQアプリ~ ships an update every 10 days, and Sound Collision every 10 days. Most recently, 大人のなぞなぞ 2~暇つぶし脳トレIQアプリ~ was updated on November 2, 2026 and Sound Collision on November 9, 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.*