# Quantum Quiz App vs ctstris

Quantum Quiz App and ctstris are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Quantum Quiz App ships an update every 12 months, ctstris every 17 months. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Quantum Quiz App | ctstris |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/quantum-quiz-app/id1529418013/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 12 months** | Every 17 months |
| Monetization | Free | — |
| Size | 97 MB | 2 MB |
| Requires iOS | **14.2** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Toptica Photonics AG](https://appshunter.io/developer/919586983) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### Quantum Quiz App

[App page](https://appshunter.io/ios/app/quantum-quiz-app/id1529418013)

Test and improve your knowledge of quantum technologies with this engaging quiz app. Play solo or compete with others in multiplayer modes, with over 800 questions across three difficulty levels. Submit your own questions to contribute to the growing library.

**Highlights:** Improve quantum technology knowledge, Solo and multiplayer modes, Over 800 questions, Three difficulty levels, Submit your own questions, Monthly high score reset

**In-app purchases:** none


### ctstris

[App page](https://appshunter.io/ios/app/ctstris/id6475251381)

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

**In-app purchases:** none


## Frequently asked questions

### Is Quantum Quiz App free?

Quantum Quiz App is free to download, with no in-app purchases.

### Is ctstris free?

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

### Do Quantum Quiz App or ctstris have ads?

Neither Quantum Quiz App nor ctstris shows ads.

### Which is updated more often, Quantum Quiz App or ctstris?

Quantum Quiz App ships an update every 12 months, and ctstris every 17 months. Most recently, Quantum Quiz App was updated on October 16, 2026 and ctstris on October 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.*