Comparison

Bix Challenge vs circloO

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

Head to head
About

Bix Challenge

Draw shapes to fill a percentage of the screen and trap moving balls. Unleash special powers when you successfully capture them. Compete to see how far you can advance in this engaging puzzle game.

Highlights
  • Draw shapes to fill screen
  • Trap moving balls
  • Unleash special powers
  • Progress through levels
  • Compete with other players
Features
Read full description

Take control of the playfield! Join over one million players! Draw shapes to fill 75% of the screen and trap the balls to unleash their special power! How far can you get? Bix has already been #2 Free App in France, #3 in Germany, #4 in UK and reached US Top 50! Get it now if you didn't try it already!

About

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.

Highlights
  • Circular physics puzzles
  • Level editor
  • Player-created levels
  • Unique physics mechanics
  • Growing levels
  • Hard Mode levels
Read full description

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

Bix Challenge4 screens
circloO4 screens

Verdict

The call

The clearest difference is rating: circloO at 4.8 against Bix Challenge's 3.3. circloO also leads on ratings volume (2.4K vs 23) and review sentiment (89% vs 75%). Bix Challenge's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Bix Challenge sells 5 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.

ReceptionRating · Positive reviews · Number of ratings

circloO holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: circloO has 2.4K ratings behind it against 23, so its average is the more settled of the two. Written reviews point the same way: 75% of Bix Challenge's written reviews are positive against 89% of circloO's.

UpkeepUpdate frequency

Bix Challenge ships an update every 2 weeks, circloO every 2 months. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

Scorecard4 real differences · 6 level
Bix Challenge versus circloO: the parameters behind the verdict, then further details
ParameterBix ChallengecircloO
PriceFreeFree
Rating3.3 (23 ratings)4.8 (2.4K ratings) — better
Positive reviews74.8% of reviews89.5% of reviews — better
Number of ratings232.4K — better
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.010 — better
Further details — not scored
Size35 MB63 MB
Age rating4+4+
DeveloperPadadazFlorian van Strien

Customer experience

Bix Challenge

All ratings23 ratings
Positive56.5%
Neutral4.3%
Negative39.1%
Written reviews305 reviews
Positive74.8%
Neutral9.2%
Negative16.1%

circloO

All ratings2,357 ratings
Positive96.9%
Neutral1.4%
Negative1.7%
Written reviews133 reviews
Positive89.5%
Neutral3.0%
Negative7.5%

User reviews

Bix Challenge

From 23 App Store ratings

What we love

  • 👍 Good time waster
  • 🤩 Addictive and fun
  • 😊 Wonderful game
  • 🎮 Retro game feel

Room to improve

  • 🐛 Glitchy controls
  • 🤬 Too many ads
  • 😞 Crashes and bugs
  • 🤯 Difficult to progress

circloO

From 2.4K App Store ratings

What 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

Bix Challenge

Reported bugs

3 issues
  • Crashes after completing levels
  • Unresponsive controls
  • Inability to exit ads

Requested features

4 requests
  • More levels and content
  • Save progress and resume
  • Landscape mode
  • Sound effects

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

5 purchases

Bix Challenge

One-time5
  • Handful of Golden Balls$0.99
  • Disable Ads$2.99
  • Pile of Golden Balls$4.99
Show 2 more
  • Bag of Golden Balls$9.99
  • Chest of Golden Balls$19.99
1 purchases

circloO

One-time1
  • Remove Ads$2.99

Questions

Is Bix Challenge free?
Bix Challenge is free to download, with in-app purchases available.
Is circloO free?
circloO is free to download, with in-app purchases available.
Which has better reviews, Bix Challenge or circloO?
circloO is rated higher. Bix Challenge averages 3.3 out of 5 from 23 ratings, while circloO averages 4.8 from 2.4K ratings.
Do Bix Challenge or circloO have ads?
Both Bix Challenge and circloO show ads.
Which is updated more often, Bix Challenge or circloO?
Bix Challenge ships an update every 2 weeks, and circloO every 2 months. Most recently, Bix Challenge was updated on October 6, 2026 and circloO on October 10, 2026.

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