Comparison

SynthStack vs Sternzy

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

Head to head
About

SynthStack

A neon-lit puzzle game set in a cyberpunk world. Stack and align vibrant shapes to clear levels, challenging your strategy and reflexes with retro-futuristic visuals and immersive soundscapes.

Highlights
  • Neon-lit cyberpunk world
  • Stack and align vibrant shapes
  • Retro-futuristic visuals
  • Immersive soundscapes
  • Strategy and reflex challenges
  • High score chasing
Features
Read full description

SynthStack is a thrilling puzzle game that transports you into a neon-lit, cyberpunk world inspired by synthwave aesthetics. Your mission is to stack and align vibrant shapes, clearing levels while enjoying dynamic gameplay. With its retro-futuristic visuals and immersive soundscapes, SynthStack challenges your strategy and reflexes. Whether you're chasing high scores or perfecting your skills, this game offers endless entertainment in a visually stunning environment. Download SynthStack now and dive into the future of puzzle gaming!

About

Sternzy

A relaxing color-sorting puzzle game featuring cute cats. Pour colored liquids between tubes until each tube contains a single color. Enjoy endless, challenging levels with special twists and a playful feline theme.

Highlights
  • Endless, ever-harder levels
  • Calm, satisfying one-handed gameplay
  • Playful cat theme
  • Special level twists
  • Earn credits for hints
  • No timers or pressure
  • Offline play
Features
Read full description

Water Sort: Cat Puzzle is a relaxing color-sorting puzzle with a cozy feline twist. Pour the colored liquid from tube to tube until each one holds a single color — easy to learn, satisfying to master, and just tricky enough to keep your brain happy. Every tube is a sleepy cat waiting to be sorted. Fill it with four matching colors and it gives you a happy little wink. FEATURES • Endless, ever-harder levels — from a gentle warm-up to genuinely brain-bending • Calm, satisfying pour-and-sort gameplay you can play one-handed • A playful cat theme with cheerful encouragement as you go • Special level twists to keep things fresh: hidden colors, mystery tubes, bombs, frozen vials, color swaps and more • Earn credits through daily rewards and play, then spend them on hints and extra vials when you're stuck • Undo your moves or remix a board anytime — no timers, no pressure • Game Center leaderboards (Highest Level, Total Stars) and achievements to chase • Color-blind friendly display options • Play offline, anywhere Made with love by one indie developer. If you enjoy it, the in-app Tip Jar is a kind way to support more updates — and you'll get bonus credits as a thank-you. No ads. Just you, the colors, and a few very patient cats.

Screenshots

SynthStack4 screens
Sternzy4 screens

Verdict

The call

The clearest difference is ads: Sternzy at none against SynthStack's shown. SynthStack's advantage is iOS requirement (15.6 vs 26.0). On price, rating, ratings volume and update cadence 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. SynthStack sells 1 one-off in-app purchase and Sternzy sells 6 one-off in-app purchases. 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 — 5.0 for SynthStack against 5.0 for Sternzy. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 8 level
SynthStack versus Sternzy: the parameters behind the verdict, then further details
ParameterSynthStackSternzy
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings11
Update frequencyEvery 2 daysEvery 2 days
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better26.0
Further details — not scored
Size22 MB10 MB
Age rating4+4+
DeveloperNurullah MacunDavid Stern

Customer experience

SynthStack

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Sternzy

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

SynthStack

One-time1
  • Remove ads$2.99
6 purchases

Sternzy

One-time6
  • 4 Credits$0.99
  • $1 Coffee Tip$0.99
  • $2 Coffee Tip$1.99
Show 3 more
  • 28 Credits$3.99
  • $5 Coffee Tip$4.99
  • $10 Coffee Tip$9.99

Questions

Is SynthStack free?
SynthStack is free to download, with in-app purchases available.
Is Sternzy free?
Sternzy is free to download, with in-app purchases available.
Which has better reviews, SynthStack or Sternzy?
SynthStack and Sternzy are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do SynthStack or Sternzy have ads?
SynthStack shows ads; Sternzy does not.
Which is updated more often, SynthStack or Sternzy?
SynthStack ships an update every 2 days, and Sternzy every 2 days. Most recently, SynthStack was updated on October 16, 2026 and Sternzy on October 7, 2026.

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