Comparison

Space Tower vs Stack Attack!!

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

Head to head

Space Tower

Idle tower defense game

Free

🎮 Games

★ 4.8568 ratingsView app →

Stack Attack!!

Rougelike Space Invaders!

Free

🎮 Games

★ 4.3403 ratingsView app →

About

Space Tower

Command a galactic defense to protect your space tower from alien invaders. Strategically upgrade your tower's abilities and weapons to withstand relentless waves of enemies and defeat powerful bosses. Enjoy idle gameplay with ample rewards, even while offline.

Highlights

Idle tower defense gameplay
Strategic tower defense
Upgrade basic abilities
Activate powerful weapons
Unlock and improve tech abilities
Defend against alien attacks
Battle mighty bosses

Features

Read full description

This is a tower defense battle in the galaxy, and you’ve been appointed to be the commander. Choose upgrades and use your strategy to make it an indestructible tower. To defend against aliens’ attacks is your final goal! What you can do: -Upgrade the strength of basic abilities -Activate and develop powerful weapons -Upgrade techs to unlock and improve abilities Game Features: -Idle tower defense gameplay -Defend the space tower with strategy -Mighty bosses await you in each galaxy chapter -Lots of rewards, even when you take a cruise Attack wave after wave of space aliens, defend the tower from mighty bosses and achieve the final success in this idle space TD battle! Let’s start this space adventure, my commander!

About

Stack Attack!!

Engage in intense battles against waves of enemies, strategically demolishing their formations with powerful weapons. Upgrade your capabilities by selecting the best skills to protect the cube world from a malevolent hex invasion.

Highlights

Defeat enemy waves
Demolish enemy stacks
Upgrade skills
Save the cube world
Space invader gameplay

Features

Read full description

Defeat waves of enemies! Use your weapons to demolish the enemies' stacks! Choose the best skills to upgrade your power! Save the cube world from the evil hexes!

Screenshots

Space Tower4 screens

Stack Attack!!4 screens

Verdict

The call

The clearest difference is rating: Space Tower at 4.8 against Stack Attack!!'s 4.3. Space Tower also leads on review sentiment (40% vs 23%). Stack Attack!!'s advantage is update cadence (every 2 weeks vs every 5 weeks). On price, ratings volume, ads 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. Space Tower sells 21 one-off in-app purchases and Stack Attack!! sells 19 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Space Tower holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 568 and 403 respectively. Written reviews point the same way: 40% of Space Tower's written reviews are positive against 23% of Stack Attack!!'s.

UpkeepUpdate frequency

Space Tower ships an update every 5 weeks, Stack Attack!! every 2 weeks. The most recent releases landed on September 10, 2026 and August 19, 2026 respectively.

Scorecard3 real differences · 7 level

Space Tower versus Stack Attack!!: the parameters behind the verdict, then further details
Parameter	Space Tower	Stack Attack!!
Price	Free	Free
Rating	4.8 (568 ratings) — better	4.3 (403 ratings)
Positive reviews	40.0% of reviews — better	23.2% of reviews
Number of ratings	568 — better	403
Update frequency	Every 5 weeks	Every 2 weeks — better
Ads	Yes	Yes
In-app purchases	Yes	Yes
Monetization	Free with in-app purchases	Free with in-app purchases
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	13.0 — better	14.0
Further details — not scored
Size	190 MB	247 MB
Age rating	4+	12+
Developer	CYBERJOY LIMITED	Voodoo

Customer experience

Space Tower

All ratings568 ratings

Positive94.5%

Neutral2.8%

Negative2.6%

Written reviews30 reviews

Positive40.0%

Neutral20.0%

Negative40.0%

Stack Attack!!

All ratings403 ratings

Positive82.6%

Neutral4.2%

Negative13.2%

Written reviews155 reviews

Positive23.2%

Neutral13.5%

Negative63.2%

User reviews

Space Tower

From 568 App Store ratings

What we love

🎮 Engaging and addictive gameplay mechanics
⬆️ Extensive upgrade and progression systems
🎨 Visually appealing design
⏱️ Good for casual play between other activities

Room to improve

💰 Aggressive monetization and pay-to-win mechanics
⚡ Energy system limits gameplay
🐛 Data synchronization failures across devices
🔄 Repetitive grinding required
⏳ Excessively long research/upgrade timers

Stack Attack!!

From 403 App Store ratings

What we love

👍 Simple and fun gameplay
🚀 No ads or microtransactions
💡 Nice armor upgrade system

Room to improve

🐛 Glitches and bugs, especially after updates
🐛 Progress and upgrades getting reset or lost
🐛 Levels becoming unplayable after a certain point

Bugs and requests

Space Tower

Reported bugs

7 issues

Game freezes and fails to load progress data
Data not syncing between devices with same Apple ID
Ad-free purchases requiring repurchase on new devices
Tournament upgrade buffs not applying correctly
Research timer displaying incorrect duration (30 minutes showing as 31 hours)

Show 2 more

Music not working
Unable to access previously completed challenge levels

Requested features

6 requests

More game levels
Additional weapons and enemy variety
Restore previously available game formats (Galaxy Background, Flaming Eye)
Remove or reduce energy system
Improve gold generation rates

Show 1 more

More interactive gameplay features

Stack Attack!!

Reported bugs

3 issues

Enemies' health scaling with player's attack power
Levels freezing or getting stuck at checkpoints
Weapon and upgrade levels getting downgraded randomly

Requested features

3 requests

Mute sound effects option
Better communication from developers about updates
More content and stages to progress through

In-app purchases

21 purchases

Space Tower

One-time21

Newbie Pack$2.99
Chapter Pack$2.99
Special Pack 1$2.99

Show 18 more

Tournament Pack 1$2.99
Pouch Of Diamonds$4.99
Chapter Pack$4.99
Special Pack 2$4.99
Piggy Bank$4.99
Tournament Pack 2$4.99
VIP Pack$9.99
Chapter Pack 3$9.99
Special Pack 3$9.99
Month Card$9.99
Tournament Pack 3$9.99
Original Price Price 10.99$10.99
Resource Pack$14.99
Original Price Price 17.99$17.99
Special Pack 4$19.99
Tournament Pack 4$19.99
Premium Resource Pack$29.99
Original Price Price 79.99$79.99

19 purchases

Stack Attack!!

One-time19

Gem Pack Small$0.99
Gold Pack Small$0.99
Starter Pack$2.99

Show 16 more

No Ads$2.99
Gem Pack Medium$4.99
2X Speed!$4.99
Gold Pack Medium$4.99
Skip'its Medium Pack$5.99
Gem Pack Large$9.99
Gold Pack Large$9.99
Premium Pass$14.99
Gem Pack XL$19.99
Skip'its Large Pack$19.99
Gold Pack XL$19.99
Diamond Hero$29.99
Gem Pack XXL$49.99
Gold Pack XXL$49.99
Gem Pack XXXL$99.99
Gold Pack XXXL$99.99

Questions

Is Space Tower free?

Space Tower is free to download, with in-app purchases available.

Is Stack Attack!! free?

Stack Attack!! is free to download, with in-app purchases available.

Which has better reviews, Space Tower or Stack Attack!!?

Space Tower is rated higher. Space Tower averages 4.8 out of 5 from 568 ratings, while Stack Attack!! averages 4.3 from 403 ratings.

Do Space Tower or Stack Attack!! have ads?

Both Space Tower and Stack Attack!! show ads.

Which is updated more often, Space Tower or Stack Attack!!?

Space Tower ships an update every 5 weeks, and Stack Attack!! every 2 weeks. Most recently, Space Tower was updated on September 10, 2026 and Stack Attack!! on August 19, 2026.