# Know Brainer vs Moonstera

The clearest difference is ads: Know Brainer at none against Moonstera's shown. Know Brainer also leads on monetization model (free vs ad-supported) and iOS requirement (11.0 vs 15.6). Moonstera's advantage is review sentiment (100% vs 80%). On price, update cadence, in-app purchases and device support 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 3 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Know Brainer | Moonstera |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | **Free** | Ad-supported |
| Size | 92 MB | 42 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ritori](https://appshunter.io/developer/975033206) | [Vladislav Meleshko](https://appshunter.io/developer/1570239025) |

## 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


### Moonstera

[App page](https://appshunter.io/ios/app/moonstera/id1570239023)

A memory matching game where players find identical cards by flipping them over. If the images don't match, the cards are turned back, requiring players to remember their positions. The game offers increasing difficulty levels to help players improve their skills.

**Highlights:** Card matching gameplay, Memory skill improvement, Progressive difficulty levels, Simple interface, Suitable for all ages

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Know Brainer free?

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

### Is Moonstera free?

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

### Do Know Brainer or Moonstera have ads?

Moonstera shows ads; Know Brainer does not.

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

Know Brainer ships an update every 3 weeks, and Moonstera every 3 weeks. Most recently, Know Brainer was updated on November 6, 2026 and Moonstera on November 3, 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.*