249+ iOS apps & games curated and reviewed
The best space defense apps and games on iPhone average 4.5★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.7★ (9K) | Yes | Yes | Aug 2026 |
| 2 |  | Free | 4.6★ (2.5K) | Yes | Yes | Aug 2026 |
| 3 |  | Free | 5.0★ (1) | No | No | May 2026 |
| 4 |  | Free | — | No | Yes | Jul 2026 |
| 5 |  | Free | 4.7★ (652K) | Yes | Yes | Aug 2026 |
| 6 |  | Free | 4.8★ (4.9K) | Yes | Yes | Aug 2026 |
| 7 |  | Free | 4.5★ (501) | Yes | Yes | Aug 2026 |
| 8 |  | Free | 5.0★ (1) | No | No | May 2026 |
Defend Earth from alien invaders in this idle tower defense game. Build diverse turrets, strategize your defense, and power up your character with unique skills and weapons. Collect resources and take on global challenges to protect the planet.
Defend your home planet in this roguelike tower defense game. Build and upgrade defenses to fend off alien invaders. Experience deep strategy with unique playthroughs and unlockable sentinels.
Pilot humanity's last hope in this thrilling 2D space shooter. Explore star systems, upgrade your spacecraft with advanced technologies, and battle increasingly formidable alien fleets. Engage in classic space combat with a unique twist, utilizing rockets, mines, and powerful bombs to defend Earth.
Pilot a lone spaceship to defend Earth from relentless alien swarms in this classic space shooter. Upgrade your weapons and skills to overcome increasingly difficult challenges across numerous levels and intense boss battles.
Engage in an adventurous competitive mobile game where you conquer planets by drawing lines. Experience exciting gameplay with multi-level challenges and fantasy props to create effective combinations for a high-quality gaming experience.
Defend planetary bases from raiders in a futuristic space war. Pilot advanced robots, tanks, and ships, utilizing a variety of weapons and upgrades to destroy enemy forces across different worlds. Complete challenging missions to earn rewards and become a top defender.
Defend Earth from alien invaders in this tower defense game with a roguelike card system. Build and upgrade futuristic weapons, adapt your strategy with unique card choices, and face waves of diverse enemies and bosses. Every playthrough offers a new, unpredictable challenge.
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.
Defend Earth from an alien invasion as a heroic defender wielding an energy cannon. Quickly stop the advance of the Hummer and its minions to preserve global peace.
Build and command your own space station and fleet in a chaotic galaxy. Forge alliances, explore new worlds, and engage in strategic space battles to shape the future of the sector. Your decisions will determine the fate of the galaxy.
Engage in intense galactic arcade battles to defend your starbase from alien invaders. Upgrade your fleet, build a powerful military force, and conquer the universe. Explore, build, and fight your way to becoming a legendary space hero.
Engage in real-time strategy to defend your base against relentless enemy waves. Build, upgrade, and deploy a variety of units with precise timing to survive epic battles in space. Master strategic decisions to overcome increasingly difficult challenges.
Defend against waves of angry aliens in this adventure space game. Choose your ship, combine skill cards and bots, and strategically upgrade weapons to survive increasingly dangerous levels. Enjoy fast-paced, automatic gameplay perfect for on-the-go play.
Explore unique destruction mechanics in a space-themed sandbox. Break planets into pieces, control spaceships in epic battles, or design your own celestial bodies with custom physics.
Engage in fast-paced arcade action with this retro-style shooter. Battle waves of alien invaders across 10 levels and bonus stages, collecting power-ups and protecting your ground forces to activate special abilities. Strategize your offense and defense to survive the alien onslaught, including a challenging Mother-Ship encounter.