Best Idle Td Game

0+ iOS apps & games curated and reviewed

4.6 avg rating
20 free apps & games
Updated June 2026

Whether you're new to idle td game or looking for an upgrade, our curated collection of 0+ iOS apps and games has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top Idle Td Game (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Slime Castle: Idle TD RTS GameSlime Castle: Idle TD RTS GameFree4.9★ (8.5K)YesYesSep 2026
2Idle Monster TDIdle Monster TDFree4.7★ (2.6K)YesYesAug 2026
3Summoners Greed: Idle Hero RPGSummoners Greed: Idle Hero RPGFree4.9★ (128K)YesYesSep 2026
4The Tower - Idle Tower DefenseThe Tower - Idle Tower DefenseFree4.2★ (20K)YesYesSep 2026
5Tiny Warriors Rush - Idle TDTiny Warriors Rush - Idle TDFree4.6★ (4.1K)YesYesSep 2026
6Idle Hero TD Tower Defense RPGIdle Hero TD Tower Defense RPGFree4.8★ (1K)YesYesSep 2026
7Dice vs Monsters: Roguelike TDDice vs Monsters: Roguelike TDFree4.4★ (11K)YesYesSep 2026
8Idle Defense: Dark ForestIdle Defense: Dark ForestFree4.6★ (2.5K)NoYesSep 2026

Top Picks for Idle Td Game

Slime Castle: Idle TD RTS Game#1

Slime Castle: Idle TD RTS Game by Azur Interactive Games Limited

Defend the kingdom from mobs!
Editor's Choice
🎮 Games
4.9😐(8.5K ratings)
FreeAdsIn-App Purchases
Slime Castle: Idle TD RTS Game screenshot 1
Slime Castle: Idle TD RTS Game screenshot 2
Slime Castle: Idle TD RTS Game screenshot 3
Slime Castle: Idle TD RTS Game screenshot 4
Slime Castle: Idle TD RTS Game screenshot 5
Slime Castle: Idle TD RTS Game screenshot 6

Defend a magical forest from invading humans in this idle tower defense RPG. Enhance your slime hero's abilities, collect legendary gear, and utilize powerful skills to defeat waves of enemies. Rebuild and strategize to protect the slime kingdoms.

What We Love

  • 🚀 Fun and addictive gameplay
  • 👍 No forced ads
  • 🚀 Decent progression system
  • 🚀 Satisfying upgrade mechanics
  • 👍 Generous free-to-play model

Room to Improve

  • 💰 Predatory in-app purchases
  • 🐛 Progression walls and difficulty spikes
  • 🐛 Inconsistent update rollouts
  • 🐛 Bugs and glitches
  • 🔍 Lack of transparency on mechanics
Idle Monster TD#2

Idle Monster TD by Swell Games LLC

Battle endless evil robots!
Strong Contender
🎮 Games
4.7😊(2.6K ratings)
FreeAdsIn-App Purchases
Idle Monster TD screenshot 1
Idle Monster TD screenshot 2
Idle Monster TD screenshot 3
Idle Monster TD screenshot 4
Idle Monster TD screenshot 5
Idle Monster TD screenshot 6

Defend your monster homeland from invading robots in this unique tower defense game. Strategically deploy a variety of monsters with unique skills and elements to stop the mechanical onslaught. Upgrade your defenses and unlock new creatures as you progress through endless waves of enemies.

What We Love

  • 🚀 Great game
  • 👍 Addictive gameplay
  • 🎨 Cute art style
  • 💰 Free-to-play friendly
  • 🔍 Lots of content and progression

Room to Improve

  • 💰 Expensive in-app purchases
  • 🐢 Slow progression at higher levels
  • 🔋 Requires constant screen time
  • 🐛 Crashes and bugs
  • 🤔 Lack of offline progression
Summoners Greed: Idle Hero RPG#3

Summoners Greed: Idle Hero RPG by PIXIO LIMITED

Ultimate Hero Battles
Worth Considering
🎮 Games
4.9😊(128K ratings)
FreeAdsIn-App Purchases
Summoners Greed: Idle Hero RPG screenshot 1
Summoners Greed: Idle Hero RPG screenshot 2
Summoners Greed: Idle Hero RPG screenshot 3
Summoners Greed: Idle Hero RPG screenshot 4
Summoners Greed: Idle Hero RPG screenshot 5
Summoners Greed: Idle Hero RPG screenshot 6

Defend your stolen treasure from an invading army of heroes in this idle tower defense game. Summon a variety of monsters and cast powerful spells to obliterate your enemies. Strategically place towers and upgrade your defenses to survive endless waves.

What We Love

  • 🚀 Addictive and fun gameplay
  • 👍 Charming and unique visuals
  • 🔓 No forced ads or in-app purchases
  • 💰 Generous rewards for idle playtime
  • 🤖 Satisfying monster collection and upgrading

Room to Improve

  • 🐢 Slow progression and wave clearing
  • 🔁 Repetitive gameplay and lack of variety
  • 🤕 Difficulty spikes can feel unfair
  • 🔀 Inability to rearrange tower placement
  • 🤷‍♂️ Unclear mechanics and abilities

More Idle Td Game apps to explore

FAQ about Idle Td Game

What is the best idle td game for iPhone?
Slime Castle: Idle TD RTS Game tops our idle td game ranking as of June 2026, with a 4.9-star average from 8.5K App Store ratings, and it's free to download.
Yes — 20 of the top idle td game we rank are free to download, including Slime Castle: Idle TD RTS Game and Idle Monster TD.
Slime Castle: Idle TD RTS Game shows ads and offers in-app purchases, according to its App Store listing as of June 2026.
Slime Castle is a role-playing idle tower defense game where players defend a mysterious forest from invading humans. You play as a slime hero, enhancing abilities, collecting equipment, and using skills to defeat enemies.
Key features include an auto-battle idle clicker system, diverse maps and enemies with unique skills, a flexible upgrade system for building your fortress, equipment collection, and strategic combinations of fortress, equipment, and enemy control.