# Number Challenge: Brain Game — Focus Test & Hidden Numbers

> Focus Test & Hidden Numbers (iPhone/iPad app by OPTOELECTRONICS FUTURE LTD.)

- Source: https://appshunter.io/ios/app/number-challenge-brain-game/id6757562508 (this page in markdown: same URL + `.md`)
- Developer: [OPTOELECTRONICS FUTURE LTD](https://appshunter.io/developer/1843235123)
- Category: Games, Education, Family, Trivia
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 73 MB
- Languages: American English
- Released: 2026-01-14
- Data updated: 2026-08-30
- User reviews in markdown: https://appshunter.io/ios/app/number-challenge-brain-game/id6757562508/reviews.md

## What is Number Challenge?

Number Challenge: Brain Game is a fast, addictive focus test inspired by viral “think of a number” challenges.

Pick a number in your head, keep your eyes locked on the center, and stay calm while numbers appear and distractions try to break your concentration. The better your focus, the higher your score.

How to Play

Choose a number (0–9) silently.

Focus on the center area while numbers cycle.

Tap to confirm when you’re ready.

Beat the timer and keep your streak alive.

Features

Quick rounds for instant play

Focus & perception challenge (simple rules, surprisingly hard)

Streaks + best score tracking

Clean minimal design (easy to understand, hard to master)

Play anywhere — no complicated setup

Train your attention, test your perception, and challenge friends to see who stays focused the longest.


## Version history (last 1 release)

### 1.0 — 2026-01-14

No release notes.

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All apps by OPTOELECTRONICS FUTURE LTD: https://appshunter.io/developer/1843235123

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-30.*