# Öi vs Computer Science Quiz Topics

The clearest difference is in-app purchases: Öi at none against Computer Science Quiz Topics's 7. Öi also leads on ads (none vs shown) and update cadence (fortnightly vs every 4 months). Computer Science Quiz Topics's advantage is rating (4.7 vs 4.2). On price, ratings volume, device support and iOS requirement there is nothing between them.

Both are free to download. Computer Science Quiz Topics sells 7 in-app purchases, starting at $1.99 per 7 days. Öi asks for nothing beyond the download.

Computer Science Quiz Topics holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 5 and 6 respectively.

Öi ships an update fortnightly, Computer Science Quiz Topics every 4 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Öi | Computer Science Quiz Topics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/oi/id993493716/reviews) | **[4.7 (6 ratings)](https://appshunter.io/ios/app/computer-science-quiz-topics/id1170666806/reviews)** |
| Number of ratings | 5 | **6** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 127 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MD Apps LTD](https://appshunter.io/developer/329788602) | [Asad Shoaib](https://appshunter.io/developer/1142302870) |

## What reviewers say

### Öi

[App page](https://appshunter.io/ios/app/oi/id993493716)

A fun twist on hide-and-seek where players hide a phone and others find it by listening for its unique sounds. Choose from characters with distinct voices and personalities to play with friends and family.

**Highlights:** Hide and seek gameplay variation, Find phone by listening, Unique character voices, Play with friends and family

**Features:** macOS Compatibility

**In-app purchases:** none


### Computer Science Quiz Topics

[App page](https://appshunter.io/ios/app/computer-science-quiz-topics/id1170666806)

Test your computer science knowledge with engaging quizzes covering a wide range of topics from AI to cybersecurity. Challenge others globally or test yourself individually. Perfect for students and professionals looking to enhance their skills.

**Highlights:** Extensive CS topic coverage, Multiplayer challenges, Individual testing, Educational and entertaining quizzes, Suitable for all skill levels, Minimal ads and smooth experience

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro - No Ads & Unlock Topics | $1.99 | per 7 days |
| Pro - No Ads & Unlock Topics | $5.99 | per month |
| Pro - No Ads & Unlock Topics | $19.99 | per year |
| Reset Timer | $0.99 | one-time |
| Half Eliminator | $0.99 | one-time |
| Unlock Topics | $0.99 | one-time |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Öi free?

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

### Is Computer Science Quiz Topics free?

Computer Science Quiz Topics is free to download, with in-app purchases available.

### Which has better reviews, Öi or Computer Science Quiz Topics?

Computer Science Quiz Topics is rated higher. Öi averages 4.2 out of 5 from 5 ratings, while Computer Science Quiz Topics averages 4.7 from 6 ratings.

### Do Öi or Computer Science Quiz Topics have ads?

Computer Science Quiz Topics shows ads; Öi does not.

### Which is updated more often, Öi or Computer Science Quiz Topics?

Öi ships an update fortnightly, and Computer Science Quiz Topics every 4 months. Most recently, Öi was updated on October 24, 2026 and Computer Science Quiz Topics 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.*