# Brain Riddle vs 3D Hidden Object Challenge

The clearest difference is price: Brain Riddle at Free against 3D Hidden Object Challenge's $2.99. Brain Riddle also leads on iOS requirement (10.0 vs 13.0). 3D Hidden Object Challenge's advantage is ads (none vs shown). On update cadence, in-app purchases and device support there is nothing between them.

Brain Riddle is free to download; 3D Hidden Object Challenge costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Brain Riddle ships an update every 18 months, 3D Hidden Object Challenge every 23 months. The most recent releases landed on October 4, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Brain Riddle | 3D Hidden Object Challenge |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 18 months** | Every 23 months |
| Size | 53 MB | 259 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 9+ | 4+ |
| Developer | [跃峰 杨](https://appshunter.io/developer/1687429670) | [Magnin & Associates](https://appshunter.io/developer/312671572) |

## What reviewers say

### Brain Riddle

[App page](https://appshunter.io/ios/app/brain-riddle-tricky-puzzles/id1359508537)

**Features:** macOS Compatibility

**In-app purchases:** none


### 3D Hidden Object Challenge

[App page](https://appshunter.io/ios/app/3d-hidden-object-challenge/id1593058430)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Brain Riddle free?

Brain Riddle is free to download, with no in-app purchases.

### Is 3D Hidden Object Challenge free?

3D Hidden Object Challenge costs $2.99, with no in-app purchases.

### Do Brain Riddle or 3D Hidden Object Challenge have ads?

Brain Riddle shows ads; 3D Hidden Object Challenge does not.

### Which is updated more often, Brain Riddle or 3D Hidden Object Challenge?

Brain Riddle ships an update every 18 months, and 3D Hidden Object Challenge every 23 months. Most recently, Brain Riddle was updated on October 4, 2026 and 3D Hidden Object Challenge on October 15, 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.*