A simple tower defense game where you drag and merge towers to level them up. Defend your gem from enemies and bosses with increasingly powerful defenses. Test your tactical skills in this classic genre.



233+ iOS apps & games curated and reviewed
The best merge tower defense 2021 apps and games on iPhone average 4.1★ across 233+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | 4.3★ (32) | Yes | No | Jul 2026 | ||
| 2 | Free | 4.8★ (14K) | Yes | Yes | Sep 2026 | ||
| 3 | Free | 4.8★ (2K) | Yes | Yes | Sep 2026 | ||
| 4 | Free | 4.7★ (16K) | Yes | No | Sep 2026 | ||
| 5 | Free | 4.7★ (891) | Yes | Yes | Sep 2026 | ||
| 6 | Free | 4.6★ (531) | Yes | Yes | Sep 2026 | ||
| 7 | Free | 4.7★ (852) | Yes | Yes | Sep 2026 | ||
| 8 | Free | — | Yes | Yes | May 2026 |



A simple tower defense game where you drag and merge towers to level them up. Defend your gem from enemies and bosses with increasingly powerful defenses. Test your tactical skills in this classic genre.






Engage in strategic tower defense battles by collecting, merging, and upgrading unique towers. Defend your kingdom against waves of enemies and epic bosses in both solo and multiplayer modes. Master deck building and tactical deployment to outwit opponents.






Engage in a unique tower defense experience with idle progression. Combine towers to enhance their power and strategically place them to overcome thousands of enemy waves. Unlock new abilities and power-ups to conquer increasingly challenging stages and bosses.