Comparison

Whack Stack! vs Sky Stack

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

Head to head
About

Whack Stack!

A physics-based puzzle game where players aim a cannon to strategically knock down stacked structures. Master each level by finding weak points and triggering satisfying chain reactions for quick, engaging gameplay.

Highlights
  • Simple cannon aiming and shooting
  • Satisfying physics-based destruction
  • Strategic puzzle-solving
  • Chain reactions and falling blocks
  • Varied structures to demolish
  • Short, satisfying levels
Features
Read full description

Welcome to Whack Stack! A colorful 3D physics puzzle game where stacked materials, tall towers and unstable buildings are waiting to be knocked down. Aim your cannon, fire the shot, and watch the structure collapse piece by piece. Smash every stack, clear the site, and finish each level with one perfect cannonball. A SITE FULL OF STACKS TO SMASH Stone blocks, wooden boards, heavy crates, steel barrels and fragile parts are stacked high and ready to fall. Every scene is a new build site: stone walls, steel frames and heavy material stacks, all built to test your aim. Load the cannon, pick your angle, and blast the whole thing down in one satisfying wave of destruction. SIMPLE MECHANIC, CLEVER PHYSICS PUZZLE The mechanic is simple: aim, shoot, smash. But every stack is a real physics puzzle. Some stone blocks hold the whole structure together. Some crates and barrels only shift. One fragile piece can break, trigger a chain reaction and drop the whole stack. Shoot without aiming and the structure just shakes. Find the weak point, control the angle and the power, fire the perfect shot and let the destruction do the rest. WHY YOU'LL LOVE WHACK STACK! • Simple cannon gameplay: aim, shoot and smash the stack • Satisfying 3D physics destruction, with every block, board and piece falling in real time • Colorful destruction scenes: stacked towers, stone walls, bridges and tricky structures • Smash stone blocks, wooden boards, crates, barrels and fragile parts • Destructive chain reactions that knock a whole building down in one blast • Clever puzzle challenge: read the scene, find the weak point, fire the perfect cannonball • Fun, chaotic cannon physics with new levels and rewarding destruction • Short, satisfying levels, perfect for a quick smash session • Easy to play and learn, tricky to master EVERY SHOT COUNTS Aiming is a skill. Control the angle, control the power, trigger the reaction. Hit one fragile block and the barrel stack pops. Knock one board down and the crates follow. Clear every object, break every obstacle, and the stage is yours. Each perfect shot rewards you with new cannons, new stone structures and bigger destruction. READY, AIM, SMASH! The cannon is ready. The stack is standing tall. Blocks are stacked, balanced and waiting to fall. Aim the cannon, hit the weak point, smash the structure and clear the stage. Can you smash every stack with the perfect cannon shot? Download Whack Stack! and start your first destruction puzzle today.

About

Sky Stack

Features
Read full description

A slab slides across the screen. Tap to drop it. Miss the edge and the overhang gets sliced off, leaving you less to work with. How high can you go? Sky Stack is built for one-handed play: portrait mode, single-tap controls, runs from 30 seconds. Perfect for the commute. No internet needed to play. ■ The world changes as you climb Speed shifts up every 20 floors. Break through the clouds at 40, fight high winds at 60, enter the aurora at 80, dodge ghost slabs at 100, and leave the atmosphere at 120. ■ PERFECT is everything A perfect drop widens your slab and charges the bomb. Four in a row triggers FEVER: double coins. ■ The bomb Fill the bomb meter, then detonate to reset your slab to full width. A second chance when things get thin. ■ Gold blocks Rare golden slabs stack three floors at once and pay bonus coins. ■ Coins and power-ups Spend coins on pre-run items: Wide Base, Magnet, Fuse. Out of luck mid-run? Pay coins to continue, but the price climbs every time. ■ Crafted feel Neon night visuals, an original synth soundtrack, and haptic feedback on every drop. Separate music and sound sliders, and it never interrupts your podcast. One tap to find out how high you can go.

Screenshots

Whack Stack!4 screens
Sky Stack4 screens

Verdict

The call

The clearest difference is in-app purchases: Sky Stack at none against Whack Stack!'s 11. Sky Stack also leads on update cadence (daily vs every 3 weeks). Whack Stack!'s advantage is device support (3 vs 1). On price, ads and iOS requirement 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. Whack Stack! sells 11 one-off in-app purchases. Sky Stack asks for nothing beyond the download.

UpkeepUpdate frequency

Whack Stack! ships an update every 3 weeks, Sky Stack daily. Both last shipped on October 31, 2026.

Scorecard3 real differences · 7 level
Whack Stack! versus Sky Stack: the parameters behind the verdict, then further details
ParameterWhack Stack!Sky Stack
PriceFreeFree
Rating4.8 (898 ratings) — better—
Positive reviews90.4% of reviews—
Number of ratings898 — better—
Update frequencyEvery 3 weeksDaily — better
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better16.0
Further details — not scored
Size332 MB5 MB
Age rating4+4+
DeveloperSupercent, Inc.Ding-Yao Jheng

In-app purchases

11 purchases

Whack Stack!

One-time11
  • staterdeal_0.99$0.99
  • moneypack1_1.99$1.99
  • valuepack_1.99$1.99
Show 8 more
  • stepup1_1.99$1.99
  • stepup2_4.99$4.99
  • superdeal_7.99$7.99
  • moneypack2_7.99$7.99
  • noads_9.99$9.99
  • megapack_24.99$24.99
  • ultimatespecial_44.99$44.99
  • moneypack6_99.99$99.99
None

Sky Stack

No in-app purchases

Questions

Is Whack Stack! free?
Whack Stack! is free to download, with in-app purchases available.
Is Sky Stack free?
Sky Stack is free to download, with no in-app purchases.
Do Whack Stack! or Sky Stack have ads?
Both Whack Stack! and Sky Stack show ads.
Which is updated more often, Whack Stack! or Sky Stack?
Whack Stack! ships an update every 3 weeks, and Sky Stack daily. Most recently, Whack Stack! was updated on October 31, 2026 and Sky Stack on October 31, 2026.

Other comparisons