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Best Tower Defense Space Apps & Games

246+ iOS apps & games curated and reviewed

4.4 avg rating
20 free apps & games
Updated November 2026

Out of 246+ tower defense space apps and games on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Tower Defense Space Apps & Games (November 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Mega Tower - Casual TD GameMega Tower - Casual TD GameFree4.6★ (5.2K)YesYesNov 2026
2Lone Space Tower DefenseLone Space Tower DefenseFree5.0★ (1)YesNoMay 2026
3Galaxy Defense: Fortress TDGalaxy Defense: Fortress TDFree4.7★ (9.1K)YesYesNov 2026
4Planet Defense: Space TD gamePlanet Defense: Space TD gameFree4.6★ (2.9K)YesYesNov 2026
5Round DefenseRound DefenseFree4.0★ (4)—NoNov 2026
6Stellar Bastion: Tower DefenseStellar Bastion: Tower DefenseFree—YesNoOct 2026
7Tower Defense byDefectiveRobotTower Defense byDefectiveRobotFree—NoYesSep 2026
8Tower Defense: Infinite WarTower Defense: Infinite WarFree4.4★ (2.5K)YesYesNov 2026

Top Picks for Tower Defense Space

Mega Tower - Casual TD Game#1

Mega Tower - Casual TD Game by HONG KONG YOULOFT TECHNOLOGY LIMITED

Merge your mega tower!
Editor's Choice
🎮 Games
4.6😊(5.2K ratings)
FreeAdsIn-App Purchases
Mega Tower - Casual TD Game screenshot 1
Mega Tower - Casual TD Game screenshot 2
Mega Tower - Casual TD Game screenshot 3
Mega Tower - Casual TD Game screenshot 4
Mega Tower - Casual TD Game screenshot 5

Build and merge towers to defend a planet in this casual strategy game. Strategically deploy and upgrade your defenses to conquer alien worlds. Experience thrilling sci-fi battles with endless challenges.

What We Love

  • 🚀 Addictive gameplay
  • 👍 Optional ads for rewards
  • 💡 Unique tower defense concept
  • 🚀 Steady progression for free-to-play players
  • 👍 Generous reward system

Room to Improve

  • 🐛 Crashes and freezes
  • 🐛 Bugs with ads and rewards
  • 🐛 Lost progress and account issues
  • 🔋 Frequent updates causing more problems
  • 💰 Expensive in-app purchases for progression
Lone Space Tower Defense#2

Lone Space Tower Defense by BigButton Co Sp.z o.o.

Survive against alien invaders
Strong Contender
🎮 Games
5.0(1 ratings)
FreeAds
Lone Space Tower Defense screenshot 1
Lone Space Tower Defense screenshot 2
Lone Space Tower Defense screenshot 3
Lone Space Tower Defense screenshot 4

Engage in strategic space battles defending the galaxy from alien invaders. Utilize powerful towers, research advanced weapons, and employ tactical cards to outwit diverse enemies. Master resource management and upgrade your defenses to become the ultimate cosmic guardian.

Galaxy Defense: Fortress TD#3

Galaxy Defense: Fortress TD by CYBERJOY LIMITED

Defend Planet, Beat Aliens!
Worth Considering
🎮 Games
4.7😞(9.1K ratings)
FreeAdsIn-App Purchases
#55in Games
Galaxy Defense: Fortress TD screenshot 1
Galaxy Defense: Fortress TD screenshot 2
Galaxy Defense: Fortress TD screenshot 3
Galaxy Defense: Fortress TD screenshot 4
Galaxy Defense: Fortress TD screenshot 5
Galaxy Defense: Fortress TD screenshot 6

Defend Earth from alien invaders in this idle tower defense game. Build and upgrade diverse turrets, strategize your defenses, and power up your character with unique chips and weapons. Join forces with players worldwide in expedition challenges to protect the planet.

What We Love

  • 🎮 Addictive gameplay
  • 🎨 Vibrant visuals
  • 🕹️ Engaging tower defense mechanics

Room to Improve

  • 💰 Monetization issues
  • 🤯 Difficulty spikes
  • 🕰️ Slow progression without spending

More Tower Defense Space apps to explore

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FAQ about Tower Defense Space

What are the best tower defense space apps & games for iPhone?
Mega Tower - Casual TD Game tops our tower defense space apps & games ranking as of November 2026, with a 4.6-star average from 5.2K App Store ratings, and it's free to download.
Yes — 20 of the top tower defense space apps & games we rank are free to download, including Mega Tower - Casual TD Game and Lone Space Tower Defense.
Mega Tower - Casual TD Game shows ads and offers in-app purchases, according to its App Store listing as of November 2026.
We track 246+ tower defense space apps & games on the iOS App Store as of November 2026, ranked by rating, recency, and analysis of real user reviews.