# Osmo World vs Primedor

The clearest difference is review sentiment: Primedor at 100% against Osmo World's 42%. Primedor also leads on rating (5.0 vs 3.9) and update cadence (every 3 days vs every 2 months). Osmo World's advantage is ratings volume (1.3K vs 1) and device support (3 vs 1). On price, ads and in-app purchases there is nothing between them.

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

Primedor holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Osmo World has 1.3K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 42% of Osmo World's written reviews are positive against 100% of Primedor's.

Osmo World ships an update every 2 months, Primedor every 3 days. The most recent releases landed on September 27, 2026 and July 1, 2026 respectively.

## The numbers

| Metric | Osmo World | Primedor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (1.3K ratings)](https://appshunter.io/ios/app/osmo-world/id1350943542/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/primedor/id6754699461/reviews)** |
| Number of ratings | **1.3K** | 1 |
| Positive reviews | 42.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Ad-supported | **Free** |
| Size | 347 MB | 11 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tangible Play](https://appshunter.io/developer/799157444) | [Harold Sultan](https://appshunter.io/developer/1846424336) |

## What reviewers say

### Osmo World

[App page](https://appshunter.io/ios/app/osmo-world/id1350943542)

This app serves as a central hub for a collection of educational games designed to foster creativity, problem-solving, and social interaction in children. It allows users to launch into various Osmo games and collect virtual rewards.

**Highlights:** Launch Osmo games, Explore game library, Win collectible stickers, Hands-on learning, Promotes creativity, Encourages problem-solving, Fosters social interaction

**In-app purchases:** none

**What reviewers like**

- 👍 Fun and educational
- 🤩 Nostalgic and engaging
- 🎨 Creative expression
- 🕹️ Variety of mini-games

**What reviewers complain about**

- 🐛 Compatibility issues with newer devices
- 🔒 Difficult login/account management
- 💸 Expensive with additional purchases required
- 🔧 Glitchy and buggy performance

**Reported bugs**

- App crashes or freezes
- Camera recognition problems
- Saved progress/data loss
- Incompatibility with certain iPad models

**Requested features**

- More game content and updates
- Improved account/progress syncing
- Simplified setup and onboarding
- Better support for newer hardware


### Primedor

[App page](https://appshunter.io/ios/app/primedor/id6754699461)

A strategic card game where players build a mathematical empire by collecting tokens, purchasing cards with permanent bonuses, and claiming legendary mathematicians. Challenge intelligent AI opponents in games of flexible speed and track your progress.

**Highlights:** Strategic token economy, Intelligent AI opponents, 90 unique math cards, 10 mathematicians to claim, Flexible gameplay speed, Progress tracking

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Osmo World free?

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

### Is Primedor free?

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

### Which has better reviews, Osmo World or Primedor?

Primedor is rated higher. Osmo World averages 3.9 out of 5 from 1.3K ratings, while Primedor averages 5.0 from 1 ratings.

### Do Osmo World or Primedor have ads?

Neither Osmo World nor Primedor shows ads.

### Which is updated more often, Osmo World or Primedor?

Osmo World ships an update every 2 months, and Primedor every 3 days. Most recently, Osmo World was updated on September 27, 2026 and Primedor on July 1, 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.*