Comparison

Osmo World vs Primedor

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Osmo World

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
Read full description

This is the home for Osmo! Launch into Osmo to explore all your favorite Osmo games, and win collectible stickers along the way. Osmo is connecting over 1 million kids around the world to a new healthy, hands-on learning experience that promotes creativity, problem-solving, and social interaction. Find out more at www.playosmo.com

About

Primedor

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
Read full description

PRIMEDOR is a strategic card game where you build a mathematical empire through careful planning and clever token management. Challenge yourself against three intelligent AI opponents—Bob, Abby, Emma, and Ann—as you purchase cards, collect tokens, and claim famous mathematicians. Core Gameplay: Collect mathematical tokens (Prime, Even, Odd, Square, Sequence, Perfect) to purchase valuable cards. Each card provides permanent bonuses and victory points. Build powerful card synergies to claim the patronage of legendary mathematicians like Euclid, Pythagoras, and Emmy Noether. Features: Strategic Token Economy: Manage a limited supply of tokens to outmaneuver opponents Intelligent AI: Face opponents that adapt their strategy and make calculated decisions 90 Unique Cards: Collect cards featuring famous mathematical concepts and sequences 10 Mathematicians to Claim: Earn bonuses from history's greatest mathematical minds Flexible Gameplay: Play 2-4 player games at your preferred speed (Slow, Normal, Fast) Track Your Progress: Monitor your stats across different player counts Beautiful Interface: Smooth animations and immersive sound design Perfect for strategy game lovers, math enthusiasts, and anyone who enjoys deep, engaging gameplay.

Screenshots

Osmo World4 screens
Primedor4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Osmo World versus Primedor: the parameters behind the verdict, then further details
ParameterOsmo WorldPrimedor
PriceFreeFree
Rating3.9 (1.3K ratings)5.0 (1 ratings) — better
Positive reviews42.3% of reviews100.0% of reviews — better
Number of ratings1.3K — better1
Update frequencyEvery 2 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.6
Further details — not scored
Size347 MB11 MB
Age rating4+4+
DeveloperTangible PlayHarold Sultan

Customer experience

Osmo World

All ratings1,348 ratings
Positive69.7%
Neutral5.9%
Negative24.4%
Written reviews156 reviews
Positive42.3%
Neutral8.3%
Negative49.4%

Primedor

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Osmo World

Reported bugs

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

Requested features

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

Primedor

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Osmo World

No in-app purchases

None

Primedor

No in-app purchases

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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