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.



210+ iOS apps & games curated and reviewed
The best merge tower defense 2021 apps and games on iPhone average 4.6★ across 210+ titles — we've ranked them by what real users actually keep on their phones. Updated July 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | 4.3★ (32) | Yes | No | Jul 2026 | |
| 2 | Free | 4.8★ (13K) | Yes | Yes | Jul 2026 | |
| 3 | Free | 4.8★ (1.9K) | Yes | Yes | Jul 2026 | |
| 4 | Free | 4.2★ (19K) | Yes | Yes | Jul 2026 | |
| 5 | Free | 4.5★ (95K) | Yes | Yes | Jul 2026 | |
| 6 | Free | 4.7★ (845) | Yes | Yes | Jul 2026 | |
| 7 | Free | 4.7★ (16K) | Yes | No | Jul 2026 | |
| 8 | Free | 4.8★ (1.1K) | Yes | Yes | Jul 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.


Build and upgrade a single tower to defend against waves of enemies in this incremental tower defense game. Make permanent upgrades, unlock new areas, and compete in tournaments. Enjoy addictive gameplay with a vast array of strategic choices.


Collect and merge units to build a powerful deck for strategic base defense. Engage in PvP battles or team up with friends in Co-Op mode to conquer enemies and earn rewards. Master unique unit abilities and faction synergies to prevail.


Merge weapons to power up your army and defend your land in this 3D tower defense strategy game. Combine merge, clicker, and idle gameplay to defeat enemies and bosses. Unlock heroes and battle other players for rewards.


Engage in an intense shooting and strategy game where you merge defensive towers to repel waves of monsters, orcs, and aliens. Develop tactical formations and upgrade your war machines to protect your base and survive challenging boss attacks.


Merge and upgrade towers to defend your realm against waves of monsters. This game offers simple, engaging gameplay with strategic depth for countless challenges. Enjoy stunning graphics and lively sound in this free-to-play tower defense experience.


A turn-based tower defense game where players strategically place and merge defenders to fend off advancing enemy blocks. It offers offline play and a challenging puzzle experience for a daring mind.


This tower defense game challenges players to strategically place and merge blocks to create powerful units. Build diverse decks and expand your territory to fend off waves of invaders, while growing your castle and characters for enhanced skills and rewards.


Engage in an addictive tower defense experience where you merge cannons to create powerful upgrades. Strategically position your enhanced defenses to repel waves of cube enemies and formidable bosses.


Build and upgrade towers, collect hundreds of cards, and command heroes to defend your kingdom. Engage in strategic battles against hordes of enemies across over 1,000 levels. Join forces with other players for epic clan quests and boss fights.


Engage in strategic tower defense battles across diverse environments. Collect and upgrade over 90 cards, including heroes, towers, spells, and equipment, to defeat over 100 types of enemies and challenging bosses. Compete in daily battles and weekly tournaments for rewards.


Experience a unique tower defense game where luck dictates your strategy. Summon units, merge them for unpredictable outcomes, and test your fortune with a roulette feature to defeat waves of monsters.


Defend your kingdom from an undead invasion by merging warriors to create powerful knights. Build and upgrade village structures to generate passive income and invest in your army's defense. Strategize your battles against zombie hordes and fearsome bosses in this adventure game.


Engage in a strategic merge and tower defense game where you merge towers, shoot paint bubbles, and defend against bosses. Progress through increasingly challenging levels with stunning graphics and collect various paintball guns to aid your defense.


Build and defend a mobile tower against waves of attacking zombies. Collect blocks to construct your fortress, equip it with weapons, and strategize your defense to survive the apocalypse. Upgrade your arsenal and progress through levels in this engaging RPG shooter.


Engage in strategic city defense by merging and upgrading buildings to fend off relentless enemy waves. This action-packed puzzle game challenges you to plan your moves carefully and use resources wisely to survive. Immerse yourself in exciting gameplay with stunning graphics and fast-paced action.


Build a mobile fortress, merge tanks to unlock powerful weapons, and defend against rogue machines. Engage in strategic battles, compete with other players globally, and enjoy idle progression with rewards.


Build and defend your fantasy kingdom in this strategy simulation game. Recruit heroes, upgrade towers, and conquer enemy cities. Engage in tactical warfare, join clans, and compete in global tournaments.