Comparison

Flippy Knife vs Stack Islands

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

Head to head
About

Flippy Knife

Master the art of knife flipping and throwing in this addictive 3D game. Perform combos, hit targets across diverse locations, and collect a vast arsenal of blades. It's a thrilling challenge for those who enjoy precision and risk-taking.

Highlights
  • Physics-based realistic knives
  • Over 120 unique blades
  • 7 different game modes
  • Awesome graphics
  • Award badges
  • Unique game mechanics
Features
Read full description

WHAT’S THE GAME ABOUT? Learn how to flip knives like a pro, to make a great combos and never miss! Become a true master of 7 different locations and get a great collection of famous knives, swords, axes and fantasy legends! — more than 30,000,000 downloads; — game of the week in 66 countries; — #1 in the top games in the USA, Russia, Australia, the UK, Canada… WHO’S PLAYING? It’s a game for those who loves knives and thrill! It’s a game for the strong and confident. Be on knife edge, take risks and hit the targets! Pick up a knife and stick it into the target! Do it in FLIPPY KNIFE on the subway or in a lineup for a game, in a coffee shop or park, at school or at work! GAME FEATURES: — more than 120 blades with a cool design; — physics-based realistic knives; — 7 different game modes in one game; — awesome graphics from the pros at Beresnev.Design; — more than 50 great award badges; — unique game mechanics; — high-quality support and super updates! Use the #flippyknife hashtag and the best content will be published on our Instagram account. Like us on our Facebook page or follow us on Instagram: www.facebook.com/BeresnevGames www.instagram.com/flippyknife And remember: skill comes with experience! SUBSCRIPTION PRICING AND TERMS Premium Membership Subscription options, prices and durations: - Weekly Premium Membership for $7,99 offers a weekly subscription after a 3-day free trial for unlocking 15 exclusive knives, getting 1000 coins daily and removing ads. - Monthly Premium Membership for $19,99 offers a monthly subscription for unlocking 15 exclusive knives, getting 1000 coins daily and removing ads. - Yearly Premium Membership for $99,99 offers a yearly subscription for unlocking 15 exclusive knives, getting 1000 coins daily and removing ads. End of trial and subscription renewal: - Payment will be charged to iTunes Account at confirmation of purchase; - Subscription automatically renews with the price and duration period as the original "1 week"/"1 month"/"1 year" package unless auto-renew is turned off at least 24-hours before the end of the current period; - Account will be charged for renewal within 24-hours prior to the end of the current period at the cost of the chosen package (weekly, monthly or annually package); - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's iTunes Account Settings after purchase; - You may cancel a subscription during its free trial period via the subscription setting through your iTunes account. This must be done 24 hours before the end of the subscription period to avoid being charged. Please visit https://support.apple.com/HT202039 for more information. Canceling trial or subscription: - You may turn off the auto-renewal of your subscription via your iTunes Account Settings. However, you are not able to cancel the current subscription during its active period; - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Links to our Terms of Service and Privacy Policy can be found below Terms of Use: https://beresnev.games/termofuse/ For all the questions please contact us at support@beresnev.games * Prices are equal to the value that "Apple's App Store Pricing Matrix" determines as the equivalent of the subscription price in $ USD

About

Stack Islands

Build towering structures by stacking blocks to create unique islands. Enjoy a relaxing experience with charming visuals and challenge yourself with fun activities. Discover a hidden mystery while competing for the top global score.

Highlights
  • Stack blocks to create islands
  • Relaxing and charming design
  • Compete for global high scores
  • Engage in fun activities
  • Discover a hidden mystery
  • No personal data tracking
Features
Read full description

Stack up blocks as high as you can! See your creation come to life as a unique and beautiful island. ◮ Relaxing and beautiful, with charming design ◮ Compete for the best score in the world ◮ Challenge yourself with fun activities ◮ Discover a hidden mystery ◮ Safe and ethical, no tracking your personal info

Screenshots

Flippy Knife4 screens
Stack Islands4 screens

Verdict

The call

The clearest difference is rating: Flippy Knife at 4.6 against Stack Islands's 2.5. Flippy Knife also leads on ratings volume (36K vs 2). Stack Islands's advantage is ads (none vs shown) and iOS requirement (12.0 vs 15.2). On price, review sentiment, update cadence 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. Flippy Knife sells 12 in-app purchases, starting at $2.99 per 7 days and Stack Islands 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

Flippy Knife holds the better App Store score, 4.6 against 2.5. That said, the two scores are not equally well evidenced: Flippy Knife has 36K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 73% of Flippy Knife's written reviews are positive against 80% of Stack Islands's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Flippy Knife ships an update every 5 weeks, Stack Islands every 2 months. The most recent releases landed on October 15, 2026 and October 5, 2026 respectively.

Scorecard4 real differences · 6 level
Flippy Knife versus Stack Islands: the parameters behind the verdict, then further details
ParameterFlippy KnifeStack Islands
PriceFreeFree
Rating4.6 (36K ratings) — better2.5 (2 ratings)
Positive reviews72.6% of reviews80.0% of reviews — better
Number of ratings36K — better2
Update frequencyEvery 5 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.212.0 — better
Further details — not scored
Size272 MB145 MB
Age rating4+4+
DeveloperBERESNEV s.r.o.Dean Longmore

Customer experience

Flippy Knife

All ratings35,552 ratings
Positive91.0%
Neutral4.8%
Negative4.2%
Written reviews709 reviews
Positive72.6%
Neutral7.6%
Negative19.7%

Stack Islands

All ratings2 ratings
Positive0.0%
Neutral50.0%
Negative50.0%
Written reviews10 reviews
Positive80.0%
Neutral10.0%
Negative10.0%

Bugs and requests

Flippy Knife

Reported bugs

4 issues
  • Ads getting stuck or not loading properly
  • Invisible walls and other physics-related issues
  • Account data not syncing or being lost after reinstall
  • Gameplay freezes or crashes on certain devices

Requested features

4 requests
  • Online multiplayer mode
  • Customization options for knives and backgrounds
  • Checkpoint system in Climb mode
  • Improved feedback on achievements and progress

Stack Islands

Not enough reviews yet to summarise bugs or requests.

In-app purchases

12 purchases

Flippy Knife

Subscriptions2
  • Premium Membership (1 week)3 Days trial$2.997 Days
  • PROFESSIONAL CLUB MEMBERSHIP3 Days trial$3.997 Days
One-time10
  • Fantasy Sword$0.99
  • 6 Simple Knives$0.99
  • 11 Knife Makers' Blades$0.99
Show 7 more
  • 2 Cold & 2 Hot Swords$0.99
  • Bad Laser$0.99
  • Medium Pack of Coins$0.99
  • 12 Gift knives$0.99
  • BOOM! missiles$0.99
  • Remove ADS$3.99
  • Self aiming knife$4.99
1 purchases

Stack Islands

One-time1
  • Complete Game Unlock$0.99

Questions

Is Flippy Knife free?
Flippy Knife is free to download, with in-app purchases available.
Is Stack Islands free?
Stack Islands is free to download, with in-app purchases available.
Which has better reviews, Flippy Knife or Stack Islands?
Flippy Knife is rated higher. Flippy Knife averages 4.6 out of 5 from 36K ratings, while Stack Islands averages 2.5 from 2 ratings.
Do Flippy Knife or Stack Islands have ads?
Flippy Knife shows ads; Stack Islands does not.
Which is updated more often, Flippy Knife or Stack Islands?
Flippy Knife ships an update every 5 weeks, and Stack Islands every 2 months. Most recently, Flippy Knife was updated on October 15, 2026 and Stack Islands on October 5, 2026.

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