Comparison

Rocket Sky! vs Water Power!

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

Head to head
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
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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

About

Water Power!

Build and manage your own hydro empire by generating power with various water-based structures. Explore new worlds, upgrade your facilities with hired engineers, and automate production to grow your city from a village to a futuristic metropolis. Participate in events and claim rewards to boost your progress in this idle simulation game.

Highlights
  • Generate power with water wheels, dams, and stations
  • Explore diverse worlds
  • Hire prestige engineers for upgrades
  • Research new tech and automate production
  • Participate in regular events
  • Grow a hydro city
Features
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Join Water Power community and start building your own hydro empire today! Key features: • Generate power with unique water wheels, dams, and high-tech stations • Explore diverse worlds and manage your growing hydro empire • Hire prestige engineers — unlock powerful upgrades for exponential growth • Expand river channels, research new tech, and automate production • Take part in regular events and claim rewards with promo codes • Watch your hydro city evolve from a village to a futuristic green metropolis Join addictive idle simulation and transform rivers into endless clean energy to grow a thriving city! Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Rocket Sky!4 screens
Water Power!4 screens

Verdict

The call

The clearest difference is update cadence: Water Power! at fortnightly against Rocket Sky!'s every 3 months. Rocket Sky!'s advantage is ratings volume (109K vs 26K). On price, rating, review sentiment and ads 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 and Water Power! sells 21 in-app purchases, starting at $4.99 per month. 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 — 4.5 for Rocket Sky! against 4.6 for Water Power!. Both are backed by a comparable volume of ratings — 109K and 26K respectively. Written reviews are what separate them: 17% of Rocket Sky!'s written reviews are positive against 21% of Water Power!'s.

UpkeepUpdate frequency

Rocket Sky! ships an update every 3 months, Water Power! fortnightly. Both last shipped on October 26, 2026.

Scorecard2 real differences · 8 level
Rocket Sky! versus Water Power!: the parameters behind the verdict, then further details
ParameterRocket Sky!Water Power!
PriceFreeFree
Rating4.5 (109K ratings)4.6 (26K ratings) — better
Positive reviews17.2% of reviews21.5% of reviews — better
Number of ratings109K — better26K
Update frequencyEvery 3 monthsFortnightly — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size267 MB453 MB
Age rating12+4+
DeveloperKwalee LtdVoodoo

Customer experience

Rocket Sky!

All ratings108,302 ratings
Positive87.6%
Neutral4.8%
Negative7.7%
Written reviews1,229 reviews
Positive17.2%
Neutral7.3%
Negative75.5%

Water Power!

All ratings26,016 ratings
Positive89.1%
Neutral4.8%
Negative6.1%
Written reviews578 reviews
Positive21.5%
Neutral12.6%
Negative65.9%

User reviews

Rocket Sky!

From 109K App Store ratings

What we love

  • 🚀 Fun and addictive gameplay
  • 👍 Simple and intuitive controls
  • 🚀 Satisfying rocket upgrades and progression

Room to improve

  • 🔥 Excessive and intrusive advertisements
  • 🔒 Requires internet connection to play
  • 🐛 Inconsistent gameplay and glitches
  • 💰 Monetization model feels exploitative

Water Power!

From 26K App Store ratings

What we love

  • 🚀 Fun and addictive game
  • 👍 Simple and easy to play
  • 🚀 Good progression in early stages

Room to improve

  • 🐛 Impossible to progress past Canada
  • 💰 Unrealistic pricing to unlock new areas
  • 🔋 Slow offline earnings
  • 📺 Too many ads
  • 🐛 Bugs and glitches

Bugs and 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

Water Power!

Reported bugs

3 issues
  • Game progress resets after updates
  • Ads that cannot be closed
  • Inconsistent money generation

Requested features

3 requests
  • Reduce the cost to unlock Canada
  • Improve offline earnings
  • Reduce the number of ads

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
21 purchases

Water Power!

Subscriptions1
  • VIP Pass$4.991 Month
One-time20
  • Boosters pack$1.99
  • Small Pack Of Coins$1.99
  • Special Bonuses$1.99
Show 17 more
  • Boxes$1.99
  • No Ads$2.99
  • No Ads$3.99
  • Special Bonuses and No Ads$3.99
  • No Ads + Boosters pack2 variants$4.99
  • Medium Pack Of Coins$5.99
  • Boosters pack$5.99
  • Pack of Crystals$5.99
  • Special Bonuses and No Ads$5.99
  • No Ads + 5 x5 Time Boosters$5.99
  • Special Bonuses$6.99
  • Quadruple offline income$7.99
  • Special Bonuses and No Ads$7.99
  • Special Bonuses and No Ads$8.99
  • Large Pack Of Coins$14.99
  • Ultra Pack Of Coins$24.99
  • Mega Pack of Coins$49.99

Questions

Is Rocket Sky! free?
Rocket Sky! is free to download, with in-app purchases available.
Is Water Power! free?
Water Power! is free to download, with in-app purchases available.
Which has better reviews, Rocket Sky! or Water Power!?
Water Power! is rated higher. Rocket Sky! averages 4.5 out of 5 from 109K ratings, while Water Power! averages 4.6 from 26K ratings.
Do Rocket Sky! or Water Power! have ads?
Both Rocket Sky! and Water Power! show ads.
Which is updated more often, Rocket Sky! or Water Power!?
Rocket Sky! ships an update every 3 months, and Water Power! fortnightly. Most recently, Rocket Sky! was updated on October 26, 2026 and Water Power! on October 26, 2026.

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