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 lines to section off areas and trap bouncing balls. Master the rule where closing a line fills the side with fewer balls. Offers 100 levels with unique challenges and a hidden endless mode.

Highlights
  • 100 levels across 10 galaxies
  • Hidden endless climb mode
  • Collect stars, chests, and gold balls
  • Boosters for assistance
  • Glowing visuals
  • Original soundtrack
  • Offline play
Features
Read full description

A new take on Bix Challenge, the line-drawing arcade classic in the spirit of Qix, Xonix and JezzBall. Draw lines to cut the field, fill it with light and trap the bouncing balls. One rule to master: when you close a line, the side with fewer balls fills up. Easy to learn, fiendishly hard to master. WHAT'S INSIDE • 100 levels across 10 galaxies, each with its own twist: ball traps, line limits, dark zones, time trials, giant balls, ice walls and hunters • The Rift: beat level 100 and a hidden climb opens. How high can you go? • Three stars to earn on every level, chests to open, gold balls to collect • Boosters when you need a hand: Slow start and Shield • Glowing visuals made for today's iPhone and iPad • The original soundtrack, now opening up as you fill the field • Your progress is saved in iCloud and follows you to your other devices • Plays offline THE ORIGINAL, STILL HERE Bix Challenge has been played by over a million people since 2008, reaching #2 in France, #3 in Germany and #4 in the UK. The classic version is still in the app, exactly as you remember it: turn on "Classic version" in Settings.

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 3.4. circloO also leads on ratings volume (2.5K vs 25) and review sentiment (89% vs 75%). Bix Challenge's advantage is ads (none vs shown) and update cadence (every 11 days vs every 2 months). On price, in-app purchases, monetization model and device support 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 10 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 3.4. That said, the two scores are not equally well evidenced: circloO has 2.5K ratings behind it against 25, 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 11 days, circloO every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
Bix Challenge versus circloO: the parameters behind the verdict, then further details
ParameterBix ChallengecircloO
PriceFreeFree
Rating3.4 (25 ratings)4.8 (2.5K ratings) — better
Positive reviews74.8% of reviews89.5% of reviews — better
Number of ratings252.5K — better
Update frequencyEvery 11 days — betterEvery 2 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.010 — better
Further details — not scored
Size32 MB63 MB
Age rating4+4+
DeveloperPadadazFlorian van Strien

Customer experience

Bix Challenge

All ratings25 ratings
Positive60.0%
Neutral4.0%
Negative36.0%
Written reviews306 reviews
Positive74.8%
Neutral9.2%
Negative16.0%

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 25 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 2.5K 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

10 purchases

Bix Challenge

One-time10
  • Handful of Golden Balls$0.99
  • Pouch of coins$0.99
  • Disable Ads$2.99
Show 7 more
  • Pile of Golden Balls$4.99
  • Bag of coins$4.99
  • Bag of Golden Balls$9.99
  • Chest of coins$9.99
  • Chest of Golden Balls$19.99
  • Vault of coins$19.99
  • Treasure of coins$49.99
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 3.4 out of 5 from 25 ratings, while circloO averages 4.8 from 2.5K ratings.
Do Bix Challenge or circloO have ads?
circloO shows ads; Bix Challenge does not.
Which is updated more often, Bix Challenge or circloO?
Bix Challenge ships an update every 11 days, and circloO every 2 months. Most recently, Bix Challenge was updated on November 1, 2026 and circloO on November 3, 2026.

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