# Know Brainer vs QuizStar

The clearest difference is in-app purchases: Know Brainer at none against QuizStar's 5. On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. QuizStar sells 5 one-off in-app purchases. Know Brainer asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Know Brainer | QuizStar |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | Free |
| Size | 92 MB | 26 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ritori](https://appshunter.io/developer/975033206) | [Vyacheslav Volkov](https://appshunter.io/developer/851886920) |

## What reviewers say

### Know Brainer

[App page](https://appshunter.io/ios/app/know-brainer/id954165627)

Explore fascinating science facts and distinguish truth from fiction. Engage in challenges, discover surprising facts, and compete with others to become the smartest player. This addictive and free game offers a fresh perspective on the world.

**Highlights:** Mind-blowing science facts, Distinguish fact from fiction, Surprising discoveries, Challenge fellow players, Free to play, Addictive gameplay

**Features:** macOS Compatibility

**In-app purchases:** none


### QuizStar

[App page](https://appshunter.io/ios/app/quizstar-be-smart/id1564757260)

Engage in a daily intellectual challenge with this multiple-choice quiz game. Test your general knowledge across various topics, train your memory, and learn new facts within a timed format. Compete with others worldwide and keep your brain sharp.

**Highlights:** Multiple choice quizzes, General knowledge questions, Timed gameplay (60 seconds), Brain training and memory exercises, Social comparison of knowledge, Hints available during gameplay

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 coins | $0.99 | one-time |
| 5 lives | $0.99 | one-time |
| 30 coins | $1.99 | one-time |
| 15 lives | $1.99 | one-time |
| 50 coins | $2.99 | one-time |


## Frequently asked questions

### Is Know Brainer free?

Know Brainer is free to download, with no in-app purchases.

### Is QuizStar free?

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

### Do Know Brainer or QuizStar have ads?

Neither Know Brainer nor QuizStar shows ads.

### Which is updated more often, Know Brainer or QuizStar?

Know Brainer ships an update every 3 weeks, and QuizStar every 3 weeks. Most recently, Know Brainer was updated on October 24, 2026 and QuizStar on October 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*