uu vs circloO
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
uu
This is a minimalist puzzle game with 200 challenging levels, offering a fun and intricate experience. It features a level selection system, the ability to replay past levels, and options to skip difficult stages or unlock all levels.
- 200 challenging levels
- Leaderboards and medals
- Replay past levels
- Skip difficult levels
- Unlock all levels
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uu - 2nd in "focus" (aa, uu, ff, au, rr, ao, rl, sp, th, ki, ci, sn, lo, ba, ov, sh, fi, do, ru & ti) Different entry points. Timing is key. Picture a multifaceted aa, more complexity, more intricacies but just has a much fun. If you're already deep into playing aa or new to the range, you'll instantly love uu, it's an amazing next step in our minamalistic gaming journey. uu starts with 200 awesome levels, with more added all the time. You can also top the leaderboard and earn medals! (bronze, silver and gold). There's 200 levels to solve right now, intertwined with all sorts of tweaks and surprises. You can also go back and replay any level you've already passed, at any time (Choose Level). If you're stuck on a really tricky level, skip it! (Tap Skip on the Fail Screen) If you can't wait, unlock all 200 levels and replay at your own pace! (Choose Level > Unlock All Levels) Thanks for all your support, I hope you're enjoying the "focus" series thus far. Handmade in Australia, General Adaptive
circloO
A colorful physics platformer where you guide a ball through growing circular levels. Collect circles to expand the play area, strategically using and avoiding obstacles. Discover unique physics mechanics and enjoy a vast collection of player-created levels.
- Circular physics puzzles
- Level editor
- Player-created levels
- Unique physics mechanics
- Growing levels
- Hard Mode levels
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circloO is a colorful physics platformer in a growing circle. This app version contains all levels from circloO and circloO 2, plus brand-new bonus levels! There's also a level editor and already over 10,000 levels created by players like you! You're a small ball rolling around in a round level. Collect circles to grow the level circle. As it grows, everything stays in the level, so you'll have to avoid and use obstacles in everchanging ways. For example, a platform that was first very useful to gain height, may prove to be a challenging obstacle after the level has grown! You can only move left and right, so you'll want to use features of the level carefully to jump and gain height. You'll discover all sorts of physics features, such as changing gravity, a sea of tiny blocks, strange contraptions and even planets with a gravity field. In challenging parts, you'll find yourself fully immersed, pressing the screen as hard as you can trying to get closer to finally collecting that next circle. But don't worry: you'll never have to start over a level, so you can always try again really quickly! And I can guarantee you'll feel amazing once you finally manage it! circloO Complete features: - Lots of cool physics features: ropes, pulleys, changing gravity and much more! I've included quite a few mechanics for you to discover. - Over 75 fun, growing, ever more challenging levels! Can you complete the six almost-but-not-quite-impossible Hard Mode levels? - There's also a level editor and an ever increasing number of player created levels! - All levels from circloO 2 and the original circloO, plus 28 brand-new levels! - Unique physics puzzles in each level. - Great music and sound effects by Stijn Cappetijn. - Minimalist and colorful graphics. - The game will take most players three to five hours to complete. Level times are saved, so you can try to beat your own highscores and speedrun levels after that! Plus there are thousands of player-created levels to continue playing forever! - Relaxing yet challenging physics puzzle platforming fun! I'm very happy that circloO 2 on the web won the first Crazy Games developer contest out of 200 contestants! It was also third in the Kongregate contest of November 2018. You may remember it from CoolMath Games as well. Reviews: "It’s an excellent game that has a very playful and chilled out approach to the gameplay, whilst also featuring some wonderfully intricate level design. A very impressive puzzle platformer you’ll really want to roll with. Highly recommended." - Free Game Planet "The difficulty scales upwards nicely and you're constantly rewarded for learning new skills as these always come up in future levels." - Jayisgames The game contains occasional ads after a level, which can be removed with a one-time in-app purchase, which supports development as well. Have fun and I'm happy to hear what you think!
Screenshots
Verdict
The clearest difference is rating: circloO at 4.8 against uu's 3.7. circloO also leads on review sentiment (89% vs 47%) and ratings volume (2.4K vs 202). uu's advantage is ads (none vs shown) and iOS requirement (8.0 vs 10). On price, update cadence, in-app purchases and monetization model 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. uu sells 3 one-off in-app purchases and circloO sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
circloO holds the better App Store score, 4.8 against 3.7. That said, the two scores are not equally well evidenced: circloO has 2.4K ratings behind it against 202, so its average is the more settled of the two. Written reviews point the same way: 47% of uu's written reviews are positive against 89% of circloO's.
uu ships an update every 5 weeks, circloO every 2 months. The most recent releases landed on August 30, 2026 and September 9, 2026 respectively.
| Parameter | uu | circloO |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (202 ratings) | 4.8 (2.4K ratings) — better |
| Positive reviews | 47.1% of reviews | 89.5% of reviews — better |
| Number of ratings | 202 | 2.4K — better |
| Update frequency | Every 5 weeks — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 10 |
| Further details — not scored | ||
| Size | 13 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | General Adaptive Apps Pty Ltd | Florian van Strien |
Customer experience
uu
circloO
User reviews
uu
From 202 App Store ratingsWhat we love
- 🎮 Great offline time sink
- 👍 Addictive and challenging
- 🎯 Levels 1-4 passed with ease
Room to improve
- 🔁 Level 5 impossible
- 🔁 Level 155 freezes
- 🐛 Occasional glitches and bugs
circloO
From 2.4K App Store ratingsWhat we love
- 👍 Relaxing and enjoyable gameplay
- 🎨 Creative and unique levels
- 🎶 Calming background music
- 🧠 Challenging but not impossible
- 🕹️ Smooth and responsive controls
Room to improve
- 🔍 Occasional performance issues
- 🕹️ Difficulty can be inconsistent
- 📺 Ads can be disruptive at times
- 🤑 Lack of free content/levels
Bugs and requests
uu
Reported bugs
3 issues- Dots spawn inside central circle on iPhone
- Center stops spinning before pins run out on level 155
- Dots migrate to inside of circle on level 142
Requested features
3 requests- Option to skip difficult levels
- More color and music
- Level progress indicators
circloO
Reported bugs
2 issues- Glitches with level progression
- Inconsistent touch/click registration
Requested features
4 requests- More levels and content updates
- Character customization options
- Improved level editor tools
- Difficulty settings or options
In-app purchases
uu
- Skip uu Level$0.99
- Remove uu Ads$1.99
- Unlock All of uu$3.99
circloO
- Remove Ads$2.99









