Idle Monster TD

Idle Monster TD

By Swell Games

Idle Monster TD is a tower defense game where players command the United Monsters Alliance to defend their homeland against robot invaders. The game features a progression system where players unlock diverse creatures and upgrade their stats to improve defensive capabilities.

Overview · Full Intel report in progress

The App DNA

What makes this app unique?

For Casual gamers who enjoy tower defense mechanics combined with idle progression loops.

What does it look like?

Key features

Strategic Tower Defensestandard

Players place specific monsters like Sea Stallion and Firefly to counter incoming robot waves.

Idle Progressionstandard

The game continues to generate gold and power up defenses while the player is offline.

Monster Collectionstandard

Players unlock and discover a variety of unique beasts, such as water sprites and fire devils, by defeating enemies.

Spell Systemstandard

Players can utilize firestorm spells to clear the map when defensive lines are overwhelmed.

How much does it cost?

freemium

Velocity

Dormant developmentShow more...

5 versions in history. Development pace: zombie.

See all version history

Who built it?

Swell Games

6 apps tracked · Games

Idle Hero TD Tower Defense RPGIdle Hero TD Tower Defense RPGIdle Hero TDIdle Hero TDIdle Hero DefenseIdle Hero DefenseMonster Tiles TD: Tower WarsMonster Tiles TD: Tower WarsIdle TD: Heroes vs ZombiesIdle TD: Heroes vs Zombies
Explore the full publisher profile

User Sentiment

What do users think recently?

How are ratings & reviews evolving?

Google Play
4.34 · 12k
App Store
4.71 · 3k

Not enough recent reviews to extract reliable themes yet.

Read the full review analysis

Competition

Competitive landscape for Idle Monster TD

How's the Games market?

The rivals identified

The Analyst's Read

Key takeaways for Idle Monster TD

Where is it heading?

Bottom line

While the game offers an engaging blend of tower defense and idle mechanics, users have expressed concerns regarding the lack of recent content updates and the aggressive nature of its monetization.

Report last updated

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Idle Monster TD, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Cite this report

Marlvel.ai. “Idle Monster TD Intelligence Report.” Updated Apr 16, 2026. https://marlvel.ai/apps/idle-monster-td

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Data licensed under CC-BY-NC 4.0