Comparison

Round and Round vs Alien Slime

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

Head to head
About

Round and Round

Features
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An Action-Packed Time Killer! -- Game Description -- In this action-packed game, a colossal sun devours countless planets! You take control of a UFO and must leap between planets to avoid being engulfed by the approaching sun! Land on planets of the same color continuously to increase your score with every combo. Aim for high scores and climb to the top of the world rankings! -- How to Play -- Press the jump button to launch the UFO from a planet. Avoid being swallowed by the sun by leaping to different planets. Keep landing on planets of the same color to build up your combo and earn varying points based on your combo count. Compete with players worldwide and aim for the highest rank in the rankings! -- Instructions -- 1. Press the jump button to launch the UFO from a planet's surface. 2. Avoid the sun's relentless pursuit by leaping to different planets. 3. Landing on planets of the same color will trigger a combo, leading to score boosts. 4. The higher your score and combo count, the better your ranking on the global leaderboard. Get Ready to Escape the Solar Onslaught! --items-- pow_red:size up. pow_blue:speed up. pow_yellow:speed down. pow_green:bonus time.

About

Alien Slime

Features
Read full description

Can you save the Solar System by stopping the aliens from sliming the planets? Alien Slime is fun for the whole family. "This app is very funny and fun to play!" "This app is great! Everyone should get it!" Objective: Save the Solar System by stopping the aliens from sliming the planets. To stop the aliens use your laser cannon to shoot the UFOs. If you hit a UFO, it will explode and you will get 50 points for each ufo you hit. You will lose 25 points for each UFO that flies off the screen without getting hit. 7 Skill Levels to choose from! To win, complete all the levels to save the Solar System. 100 points will be deducted for each planet that gets slimed. If 3 planets get slimed in any level, you loose. Enjoy! * If you like this app, please write a review and also share this app with your friends on social media. Thank you. ** If you are experiencing technical problems with this app, or if you have ideas on how to make this app better, please contact us by pressing the "App Support" button located in the Information screen. Thank you.

Screenshots

Round and Round3 screens
Alien Slime4 screens

Verdict

The call

The clearest difference is price: Round and Round at Free against Alien Slime's $0.99. Round and Round also leads on update cadence (weekly vs every 14 months) and iOS requirement (11.0 vs 16.0). Alien Slime's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Round and Round is free to download; Alien Slime costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Round and Round ships an update weekly, Alien Slime every 14 months. The most recent releases landed on October 27, 2026 and September 25, 2026 respectively.

Scorecard4 real differences ยท 2 level
Round and Round versus Alien Slime: the parameters behind the verdict, then further details
ParameterRound and RoundAlien Slime
PriceFree โ€” better$0.99
Update frequencyWeekly โ€” betterEvery 14 months
AdsYesNo โ€” better
In-app purchasesNoNo
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS11.0 โ€” better16.0
Further details โ€” not scored
Size43 MB13 MB
Age rating4+9+
DeveloperU-WORKS incJS Digital Productions, Inc.

In-app purchases

None

Round and Round

No in-app purchases

None

Alien Slime

No in-app purchases

Questions

Is Round and Round free?
Round and Round is free to download, with no in-app purchases.
Is Alien Slime free?
Alien Slime costs $0.99, with no in-app purchases.
Do Round and Round or Alien Slime have ads?
Round and Round shows ads; Alien Slime does not.
Which is updated more often, Round and Round or Alien Slime?
Round and Round ships an update weekly, and Alien Slime every 14 months. Most recently, Round and Round was updated on October 27, 2026 and Alien Slime on September 25, 2026.

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