Osmo Numbers vs Rainbow Ghost Rescue
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Osmo Numbers
Engage in hands-on math activities with physical tiles that interact with your device. Solve problems to collect virtual fish, learn geography, and explore marine biology in a fun, stress-free environment.
- Hands-on play with physical tiles
- Counting, addition, subtraction, multiplication
- Collect over 100 virtual fish
- Learn geography and marine biology
- Real-time feedback
- Stress-free learning environment
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Dive into an ocean of hands-on math fun! In Osmo Genius Numbers, play with physical Osmo Numbers Tiles, including dots and digits. When your results match the numbers on the screen, cartoon bubbles burst with a satisfying pop! Count, add, subtract, or multiply to collect over 100 fish across the world to learn about geography and marine biology! Real-time feedback lets kids learn math through experimentation in a stress-free environment. When kids get the idea that there are multiple good ways to solve a problem, math becomes creative and fun. Play your favorite Osmo Genius Numbers on both iPhone and iPad! Use your iPhone with the Osmo Base for iPad and Genius game hardware - each can be found at playosmo.com. * Requires the Osmo Base and Osmo Numbers Tiles. Each sold separately or as part of Osmo Genius Starter Kit or Osmo Genius Numbers. * Other Osmo Genius Starter Kit games Masterpiece and Newton are not available on iPhone today, they will be released in the next month or two, so keep your eyes peeled! * Please see our device compatibility list here: https://support.playosmo.com/hc/articles/115010156067 * Compatible iPhones: iPhone 12, 12 Pro, 12 Pro Max iPhone 13, 13 Pro, 13 Pro Max iPhone 14, 14 Plus * Not compatible: iPhone 14 Pro, 14 Pro Max iPhone 12 Mini,13 Mini iPhone SE (1-3) iPhone 11 Series and older “One of 2016’s most intuitive product designs.” - Fast Company Award "...once again, Osmo has built something wonderfully creative and interactive." - Venture Beat "Osmo Numbers takes the fear out of figures." - Forbes "…revamp the unimaginative worksheets educators use to teach math" - TechCrunch Winner of the toy industry's top awards: **Best Design** - Good Design, 2016 **Best Product Designs** - Fast Company Finalist, 2016 **Innovative Toy of the Year** - TOTY Finalist, 2015 **Best Inventions** - TIME, 2014 About Osmo Osmo is using the screen to create a new healthy, hands-on learning experience that promotes creativity, problem-solving and social interaction. We do this with our reflective artificial intelligent technology.
Rainbow Ghost Rescue
Embark on a colorful adventure to clean up gooey messes on Pirate Island and beyond. Rescue adorable characters, unlock new friends, and battle a mischievous pirate crab. Explore diverse worlds and enjoy endless fun with multiple game modes.
- Clean up Purple Portal Goo
- Rescue and collect characters
- Battle the RainbowGhost Pirate Crab
- Unlock 40+ story levels
- Play Marshmallow Mode with infinite levels
- Collect 30+ playable characters
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Ahoy!! PiRATE iSLAND got covered in Purple Portal Goo YUCK!! We need the help of the Rainbow Ghosts to clean this mess up! Play as Pink, Blue, Green, or Purple in this new A for Adley game!! PiRATE iSLAND is not the only thing that needs saving! There are tons of characters from Adley's Playspace that are stuck in the Portal Goo! Save friends along the way and add them to your cleanup crew!! Watch out for the RainbowGhost Pirate Crab! He will shoot cannon balls and spread more Portal Goo!! Keep a watchful eye out for future updates. Pirate Island may be clean, but Fairy Forest is next! Imagine if the Dragon turned into the Rainbow Ghost Dragon!?? Be sure to try Marshmallow Mode! It has infinite levels and after every 10 you unlock a new friend! Play as Monkeys, or Turtles, or maybe even Pirate Crabs! There are 30+ playable characters! This FREE game is made for kids to enjoy and is easy to learn while also fun to play. All 40+ story levels will keep you adventuring for hours. Or play infinite maps in Marshmallow Mode! There will be many updates in the future all completely free including Fairy Forest, Mermaid Bay, Unicorn Universe, and many more! As you and the clean-up crew remove the Portal Goo you'll rescue new friends you can play as! Can you complete all these challenges? - Unlock 40+ levels! - Rescue 30+ characters and their trails in Marshmallow Mode! - Defeat the Pirate Captain before PiRATE iSLAND is completely covered in Portal Goo!! As seen on Shonduras - Best Day Ever, A for Adley - Learning & Fun, and G for Gaming
Screenshots
Verdict
The clearest difference is review sentiment: Rainbow Ghost Rescue at 80% against Osmo Numbers's 33%. Rainbow Ghost Rescue also leads on rating (4.3 vs 3.8) and monetization model (free vs free with in-app purchases). On price, ratings volume, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Rainbow Ghost Rescue holds the better App Store score, 4.3 against 3.8. Both are backed by a comparable volume of ratings — 146 and 367 respectively. Written reviews point the same way: 33% of Osmo Numbers's written reviews are positive against 80% of Rainbow Ghost Rescue's.
Osmo Numbers ships an update every 2 months, Rainbow Ghost Rescue every 3 weeks. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.
| Parameter | Osmo Numbers | Rainbow Ghost Rescue |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (146 ratings) | 4.3 (367 ratings) — better |
| Positive reviews | 33.3% of reviews | 79.8% of reviews — better |
| Number of ratings | 146 | 367 — better |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 358 MB | 288 MB |
| Age rating | 4+ | 4+ |
| Developer | Tangible Play | Shonduras Inc. |
Customer experience
Osmo Numbers
Rainbow Ghost Rescue
Bugs and requests
Osmo Numbers
Not enough reviews yet to summarise bugs or requests.
Rainbow Ghost Rescue
Reported bugs
3 issues- Game freezing or closing unexpectedly
- Levels not registering as completed
- Inconsistent controls or responsiveness
Requested features
4 requests- More diverse levels and challenges
- Additional characters and customization options
- Ability to save progress and resume later
- Multiplayer or co-op game modes
In-app purchases
Osmo Numbers
No in-app purchases
Rainbow Ghost Rescue
No in-app purchases
Questions
Is Osmo Numbers free?
Is Rainbow Ghost Rescue free?
Which has better reviews, Osmo Numbers or Rainbow Ghost Rescue?
Do Osmo Numbers or Rainbow Ghost Rescue have ads?
Which is updated more often, Osmo Numbers or Rainbow Ghost Rescue?
Other comparisons
