# Quick Calculation Quiz vs One Brain

The clearest difference is update cadence: One Brain at weekly against Quick Calculation Quiz's every 10 months. Quick Calculation Quiz's advantage is review sentiment (87% vs 59%). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Quick Calculation Quiz sells 5 in-app purchases, starting at $2.99 per month and One Brain sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Quick Calculation Quiz holds the better App Store score, 4.6 against 4.4. Both are backed by a comparable volume of ratings — 208 and 297 respectively. Written reviews point the same way: 87% of Quick Calculation Quiz's written reviews are positive against 59% of One Brain's.

Quick Calculation Quiz ships an update every 10 months, One Brain weekly. Both last shipped on September 24, 2026.

## The numbers

| Metric | Quick Calculation Quiz | One Brain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (208 ratings)](https://appshunter.io/ios/app/quick-calculation-quiz/id1085581108/reviews)** | [4.4 (297 ratings)](https://appshunter.io/ios/app/one-brain/id1229367064/reviews) |
| Number of ratings | 208 | **297** |
| Positive reviews | **86.8% of reviews** | 58.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 10 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 10 MB |
| Requires iOS | 15.2 | **15** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | +4 |
| Developer | [Brachmann Online Marketing GmbH & Co. KG](https://appshunter.io/developer/682848918) | [Erik Wegener](https://appshunter.io/developer/424482392) |

## What reviewers say

### Quick Calculation Quiz

[App page](https://appshunter.io/ios/app/quick-calculation-quiz/id1085581108)

Test your math skills in a timed challenge. Solve equations quickly to achieve a high score and compete with friends. It's a fun way to train your brain with both easy and challenging problems.

**Highlights:** Timed math problem solving, High score tracking, Multiplayer comparison, Brain training exercises, No calculator required

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | per month |
| Voluntary Payment 1 | $0.99 | one-time |
| Voluntary Payment 2 | $2.99 | one-time |
| Voluntary Payment 3 | $9.99 | one-time |
| Remove Ads | $12.99 | one-time |

**What reviewers like**

- 🧠 Effective mental math training
- 👍 Simple and user-friendly interface
- ⚡ Good difficulty progression for various skill levels
- 🎮 Engaging and fun gameplay
- 💰 Free to use with optional ad-free upgrade

**What reviewers complain about**

- 🐛 Submit button is too small and difficult to click
- 🔤 Number pad layout is confusing and unintuitive
- ⏰ Time pressure can be frustrating for some users
- 🔁 Limited variety - repetitive problem types
- 📺 Too many advertisements

**Reported bugs**

- Submit button click detection is unreliable
- Scoring system not calculating all correct answers properly
- Screen touch responsiveness issues on smaller devices

**Requested features**

- Ability to select specific calculation types (addition, subtraction, multiplication, division)
- Multiple difficulty levels or stages
- Timed vs untimed game modes
- Direct multiplayer/duel mode between two players
- Voice input option for answers


### One Brain

[App page](https://appshunter.io/ios/app/one-brain/id1229367064)

Test your cognitive abilities with a game inspired by the Stroop effect. Quickly identify matching colors, arrow directions, or true/false math equations under time pressure. Challenge your brain to process conflicting information and achieve high scores.

**Highlights:** Stroop effect inspired gameplay, Color matching challenges, Arrow direction tests, Math equation verification, Timed gameplay, Score tracking

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |

**What reviewers like**

- 👍 Simple and effective brain training
- 🧠 Helps improve focus and concentration
- 🤯 Challenging and addictive gameplay

**What reviewers complain about**

- ⏱️ Timer is too short, needs more time
- 🙄 Excessive ads and interruptions
- 🤖 Inconsistent scoring and feedback

**Reported bugs**

- Incorrect registering of correct answers
- Crashes and freezes on certain devices
- Keyboard controls not working as expected

**Requested features**

- Adjustable difficulty levels
- More game modes and variations
- Option to disable ads or pay for ad-free version


## Frequently asked questions

### Is Quick Calculation Quiz free?

Quick Calculation Quiz is free to download, with in-app purchases available.

### Is One Brain free?

One Brain is free to download, with in-app purchases available.

### Which has better reviews, Quick Calculation Quiz or One Brain?

Quick Calculation Quiz is rated higher. Quick Calculation Quiz averages 4.6 out of 5 from 208 ratings, while One Brain averages 4.4 from 297 ratings.

### Do Quick Calculation Quiz or One Brain have ads?

Both Quick Calculation Quiz and One Brain show ads.

### Which is updated more often, Quick Calculation Quiz or One Brain?

Quick Calculation Quiz ships an update every 10 months, and One Brain weekly. Most recently, Quick Calculation Quiz was updated on September 24, 2026 and One Brain on September 24, 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.*