Comparison

Impossible 7! vs Rocket Sky!

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

Head to head
About

Impossible 7!

Test your speed, skill, and rhythm by counting as high as possible while avoiding numbers divisible by 7 or containing the digit 7. Features three distinct game modes to challenge players of all levels.

Highlights
  • Speed, skill, and rhythm gameplay
  • Avoid numbers divisible by 7
  • Avoid numbers containing the digit 7
  • Three distinct game modes
  • Leaderboards and Game Center support
  • Simple to play, difficult to master
Features
Read full description

"I love the idea of this app" - AppAdvice.com Impossible 7 is a game of speed, skill and rhythm. Count as far as you can, as fast as you can, while avoiding numbers that are evenly divisible by 7 and numbers that include the digit 7. INSTRUCTIONS Numbers like 1,2,3,4,5,6 are ok! but watch out from multiplications of seven (7,14,21,28,35,etc) and avoid numbers that include the digit seven (17,27,37,47,etc) SOUNDS EASY, RIGHT? - Not exactly! There are three different modes. - Survival Mode: race against the clock! - Sprint 0-50: How fast can you make it to 50? - Sprint 0-100: To 100? FEATURES - sweet graphics - 3 different game modes - simple to play, difficult to master - leaderboards, Game center support

About

Rocket Sky!

Tap and hold to launch your rocket, managing heat to avoid overheating. Upgrade your rocket to reach new heights, break records, and explore diverse planets. Unlock new rockets and enjoy a colorful 2D space adventure.

Highlights
  • Tap and hold to launch
  • Manage rocket heat
  • Rocket upgrades
  • Explore new planets
  • Unlock rockets
  • Colorful 2D design
Features
Read full description

Tap and hold the screen to launch your rocket as far as you can, but make sure not to overheat, otherwise it's game over! Upgrade your rocket to reach new heights, break records and explore new planets. Space is waiting for you! Rocket Sky! features: Simple and addictive gameplay Numerous upgrades to keep you exploring Variety of planets and rockets to unlock Colourful 2D design SUBSCRIBE TO ROCKET SKY! Subscribe to Rocket Sky! for all of the following benefits: * Receive x2 Earnings * Get the Monster Truck * No Ads, which removes non-optional adverts from the game SUBSCRIPTIONS INFORMATION: Rocket Sky! VIP Membership access offers two membership options: 1) A weekly subscription costing $5.49 per week after a 3 day FREE trial period. 2) A monthly subscription costing $14.49 per month. After buying this subscription, you will unlock; x2 earnings for your in game currency on all your flights, the monster truck which will give you an extra boost on every flight, and receive no ads, which removes non-optional ads from the game. This is an auto-renewable subscription. The payment is charged to your account after confirmation. The subscription is renewed unless you unsubscribe 24 hours before the period ends. Your account will also be charged for renewal The price notes are for United States customers. Pricing in other countries may change and actual charges may be converted to local currency. End of trial and subscription renewal: - The payment is charged to your iTunes account after a confirmation of purchase - The subscription is renewed unless you unsubscribe 24 hours before the end of the current period - The account will be charged for renewal 24 hours before the end of the current period at the standard cost of the weekly subscription - The user may manage the subscription and auto-renewal by accessing the user's account settings after purchase in the store - No cancellation of the current subscription is permitted during the active subscription period - Any unused portion of the free trial period will be forfeited when the subscription is purchased Cancelling a trial or subscription: - In order to cancel a subscription during the free trial period you need to cancel it through your account in the Store. This must be done at least 24 hours before the end of the free trial period to avoid being charged. http://privacy.servers.kwalee.com/privacy/RocketSkyEULA.html

Screenshots

Impossible 7!3 screens
Rocket Sky!4 screens

Verdict

The call

The clearest difference is review sentiment: Impossible 7! at 63% against Rocket Sky!'s 17%. Impossible 7! also leads on in-app purchases (none vs 9) and ads (none vs shown). Rocket Sky!'s advantage is update cadence (every 3 months vs every 63 months) and rating (4.5 vs 4.1). On price 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. Rocket Sky! sells 6 in-app purchases, starting at $5.49 per 7 days. Impossible 7! asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Rocket Sky! holds the better App Store score, 4.5 against 4.1. That said, the two scores are not equally well evidenced: Rocket Sky! has 108K ratings behind it against 48, so its average is the more settled of the two. Written reviews complicate that: 63% of Impossible 7!'s written reviews are positive against 17% of Rocket Sky!'s, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Impossible 7! ships an update every 63 months, Rocket Sky! every 3 months. The most recent releases landed on September 23, 2026 and September 30, 2026 respectively.

Scorecard8 real differences · 2 level
Impossible 7! versus Rocket Sky!: the parameters behind the verdict, then further details
ParameterImpossible 7!Rocket Sky!
PriceFreeFree
Rating4.1 (48 ratings)4.5 (108K ratings) — better
Positive reviews62.5% of reviews — better17.3% of reviews
Number of ratings48108K — better
Update frequencyEvery 63 monthsEvery 3 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size6 MB267 MB
Age rating4+12+
DeveloperKfirapps LimitedKwalee Ltd

Customer experience

Impossible 7!

All ratings48 ratings
Positive75.0%
Neutral14.6%
Negative10.4%
Written reviews8 reviews
Positive62.5%
Neutral0.0%
Negative37.5%

Rocket Sky!

All ratings108,302 ratings
Positive87.6%
Neutral4.8%
Negative7.7%
Written reviews1,223 reviews
Positive17.3%
Neutral7.3%
Negative75.5%

Bugs and requests

Impossible 7!

Not enough reviews yet to summarise bugs or requests.

Rocket Sky!

Reported bugs

3 issues
  • Freezing and crashing after watching ads
  • Inconsistent rocket performance and height
  • Upgrade options not working as expected

Requested features

4 requests
  • Offline play mode
  • More planets and rocket variety
  • Reduced advertisement frequency
  • Ability to permanently remove ads

In-app purchases

None

Impossible 7!

No in-app purchases

6 purchases

Rocket Sky!

Subscriptions2
  • VIP MEMBERSHIP3 Days trial$5.497 Days
  • MONTHLY VIP MEMBERSHIP$14.491 Month
One-time4
  • Special Event2 variants$0.99
  • Remove Ads3 variants$2.99
  • Explorer's Pack$9.99
Show 1 more
  • Explorer's Pack$24.99

Questions

Is Impossible 7! free?
Impossible 7! is free to download, with no in-app purchases.
Is Rocket Sky! free?
Rocket Sky! is free to download, with in-app purchases available.
Which has better reviews, Impossible 7! or Rocket Sky!?
Rocket Sky! is rated higher. Impossible 7! averages 4.1 out of 5 from 48 ratings, while Rocket Sky! averages 4.5 from 108K ratings.
Do Impossible 7! or Rocket Sky! have ads?
Rocket Sky! shows ads; Impossible 7! does not.
Which is updated more often, Impossible 7! or Rocket Sky!?
Impossible 7! ships an update every 63 months, and Rocket Sky! every 3 months. Most recently, Impossible 7! was updated on September 23, 2026 and Rocket Sky! on September 30, 2026.

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