Comparison

Spermy vs circloO

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

Head to head
About

Spermy

Navigate a challenging obstacle course by tapping to steer your sperm cell forward. Avoid touching the walls to survive and aim for objectives to boost your score. Compete for a high score and unlock achievements.

Highlights
  • Tap to steer
  • Avoid wall collisions
  • Collect objectives for points
  • High scores and leaderboard
  • Unlock achievements
  • Previous attempts as company
Features
Read full description

You are one of the millions that made it! Can you make it far enough to make sure your name will continue living? Tap the screen to turn your spermcell, keep doing this so you will move forward. But don't lose control because if you do and touch the wall your change of life is over! Features - Small tutorial - 10 other sperms to keep you company (your previous attempts) - Highscores - Get the objectives (yellow balls) to get extra points - Leaderboard - Achievements

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

Spermy3 screens
circloO4 screens

Verdict

The call

The clearest difference is ads: Spermy at none against circloO's shown. Spermy also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (7.0 vs 10). circloO's advantage is ratings volume (2.4K vs 339). On price, rating, review sentiment 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. Spermy sells 1 one-off in-app purchase 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

On the App Store both sit at effectively the same score — 4.7 for Spermy against 4.8 for circloO. That said, the two scores are not equally well evidenced: circloO has 2.4K ratings behind it against 339, so its average is the more settled of the two. Written reviews split almost evenly too, at 90% and 89% positive.

UpkeepUpdate frequency

Spermy ships an update every 2 weeks, circloO every 2 months. The most recent releases landed on September 19, 2026 and September 26, 2026 respectively.

Scorecard4 real differences · 6 level
Spermy versus circloO: the parameters behind the verdict, then further details
ParameterSpermycircloO
PriceFreeFree
Rating4.7 (339 ratings)4.8 (2.4K ratings) — better
Positive reviews90.2% of reviews — better89.5% of reviews
Number of ratings3392.4K — better
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS7.0 — better10
Further details — not scored
Size88 MB63 MB
Age rating9+4+
DeveloperRene ZuidhofFlorian van Strien

Customer experience

Spermy

All ratings339 ratings
Positive92.9%
Neutral1.5%
Negative5.6%
Written reviews153 reviews
Positive90.2%
Neutral2.0%
Negative7.8%

circloO

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

User reviews

Spermy

From 339 App Store ratings

What we love

  • 🚀 Nostalgic and educational
  • 👍 Addictive and fun gameplay
  • 💡 Unique and creative concept

Room to improve

  • 🐛 Occasional glitches and crashes
  • 🔍 Difficult and challenging
  • 🤔 Questionable content

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

Spermy

Reported bugs

2 issues
  • Unresponsive controls
  • Compatibility issues with older devices

Requested features

3 requests
  • Add difficulty levels
  • Implement multiplayer mode
  • Introduce new game modes

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

1 purchases

Spermy

One-time1
  • No ads$0.99
1 purchases

circloO

One-time1
  • Remove Ads$2.99

Questions

Is Spermy free?
Spermy 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, Spermy or circloO?
circloO is rated higher. Spermy averages 4.7 out of 5 from 339 ratings, while circloO averages 4.8 from 2.4K ratings.
Do Spermy or circloO have ads?
circloO shows ads; Spermy does not.
Which is updated more often, Spermy or circloO?
Spermy ships an update every 2 weeks, and circloO every 2 months. Most recently, Spermy was updated on September 19, 2026 and circloO on September 26, 2026.

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