# Idle Monster TD — Battle endless evil robots!

> Idle tower defense game where monsters defend against robot invaders. (iPhone/iPad app by Swell Games LLC.)

- Source: https://appshunter.io/ios/app/idle-monster-td/id1493941058 (this page in markdown: same URL + `.md`)
- Developer: [Swell Games LLC](https://appshunter.io/developer/1608286310)
- Category: Games, Entertainment, Adventure, Simulation
- Price: Free with in-app purchases
- Rating: 4.70/5 from 2,555 App Store ratings · 229 written reviews indexed
- Age rating: 9+
- Requires: iOS 12.0 · 116 MB
- Languages: American English
- Released: 2020-04-22
- Data updated: 2026-08-26
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/idle-monster-td/id1493941058/reviews.md

## What is Idle Monster TD?

Over 2 million players!

Protect the... monsters? As the commander of the United Monsters Alliance, you’ll defend your homeland from menacing machines in Idle Monster TD.

This delightful take on tower defense flips the script, putting you in charge of helpful creepy-crawlies trying to stop robot invaders from pummeling your base. Strategically place allies like Sea Stallion for extra-speedy attacks, or use Firefly for heavier damage. And if things get real dicey, just wipe the map clean with a firestorm spell!

Eradicating bots gives you upgrades to bolster power, speed, and other stats - and the more bots you obliterate, the more monsters you’ll unlock. Idle Monster TD’s menagerie is filled with awesome beasts, like cute water sprites and scorching fire devils. Discovering new creatures is part of the fun.

Like any loyal pal, Idle Monster TD takes care of itself when you’re away. Come back in a few days to claim gold and power up your defenses. Those robots don’t sleep—but neither do your monsters.

Features:
- Unlock 44 unique monsters of different elements (Water, Air, Earth, and Fire), all of which have different skill sets that make tower synergy crucial to success.
- Strategize by placing up to 10 monsters at a time. Determining the most effective combination of their elemental skills and passive boosts will keep you entertained and speculating for weeks!
- Play through 8 different maps, each requiring different strategies to defend most efficiently.
- Bi-weekly PvP tournaments give this casual game a competitive edge.
- Discover countless upgrades, research, spells, artifacts, relics, technology, and more to level up with a variety of different resources.
- Several rewarding mini-games, such as Drone Swarms, Cargo Ships, and Tech Ships.
- Non-stop, endless gameplay!
- Fantasy RPG-based world and classes.
- Complete tons of daily missions and achievements.
- Offline gold earnings reward you while the game is closed!
- Fun and cute pixel artwork.

Idle Monster TD is a perfect blend of the Idle and Tower Defense genres. The game is endless and can mostly play itself without you watching. However, an immense amount of strategy is required to play efficiently and place well against your peers on the leaderboards. Go on an epic never-ending quest, explore a fantastic world, battle robots and monsters, and defeat epic bosses in Idle Monster TD!

## Key features

- Unlock 44 unique elemental monsters
- Strategic monster placement and synergy
- 8 diverse defense maps
- Bi-weekly PvP tournaments
- Countless upgrades and research options
- Offline gold earnings
- Endless gameplay

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Ads Bundle | $7.99 | one-time |
| Slayer Bundle | $17.99 | one-time |
| Game Speed x2 | $9.99 | one-time |
| Offline Gold Perk | $4.99 | one-time |
| Tournament Boost | $4.99 | one-time |
| Gems Pack 1 | $4.99 | one-time |
| Gems Pack 2 | $9.99 | one-time |
| Gems Pack 3 | $19.99 | one-time |
| Starter Pack | $7.99 | one-time |
| Pro Pack | $19.99 | one-time |
| Resource Pack 5 | $19.99 | one-time |


## What do users think of Idle Monster TD?

Overall sentiment: positive

**Pros**

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

**Cons**

- 💰 Expensive in-app purchases
- 🐢 Slow progression at higher levels
- 🔋 Requires constant screen time
- 🐛 Crashes and bugs
- 🤔 Lack of offline progression

**Commonly reported bugs**

- Leaderboards not loading
- Prestige feature not working as expected
- Targeting issues with towers
- Inconsistent ad rewards
- Essence and currency display issues

**Most requested features**

- Add more monsters and towers
- Implement offline progression
- Improve speed options and controls
- Add more communication features (clans, chat, etc.)
- Optimize for larger screens (iPad, iPhone X/11)

## Recent user reviews (10 of 229)

All indexed reviews: https://appshunter.io/ios/app/idle-monster-td/id1493941058/reviews.md

### 1/5 — Ads and game pictures

*2026-03-09*

lol I just wrote this and was looking at the pictures and the text they put on the images is incredibly wrong. They say defend your tower but you are defending a portal. They say evolve your monsters but there is no way to evolve them. You unlock new ones with currency you get. How do you not even know what is in your own game? This game itself is not bad. The funny part is you would think the part that makes them money they would make sure works. Just started playing and watched I want to say 3 level of ads so 15 and now almost every single ad is a black screen. I have to close and reopen the app and the floating treasure chest is gone. It's becoming tedious and to the point where  won't watch any other ads. So their way of making money won't make them any from me.

### 5/5 — LOVE THE GAME

*2025-09-01, version 108*

I have a iPad mini two and it runs perfectly no lagg at all and the game it self is FUN but one thing that not good is no updates plsss start updating a but

### 5/5 — LOVE THE GAME

*2025-07-12, version 108*

I have a iPad mini two and it runs perfectly no lagg at all and the game it self is FUN

### 5/5 — Absolutely Love It

*2025-03-07, version 108*

It’s a pretty nice idle game, I’m haven’t played enough tower defense games to compare but it seems like a relatively decent one. The monsters and enemies are designed well and I’m a huge fan of the art style and the gameplay loop is simple but enjoyable. Again, it’s more of a tower defense themed idle game if anything, but as an idle game it’s pretty nice.

### 5/5 — I love the game, just have a suggestion

*2025-03-07, version 108*

Hi I have been playing this game for a little over a year and I absolutely love it. I think it would be helpful if you guys added spell layouts just like you have for monster layouts. You can put it in the bottom left right next to the spells?

### 3/5 — Copy

*2025-02-23*

It’s an exact copy of another game they copied everything

### 2/5 — Expensive mtx, no updates

*2025-02-07, version 108*

Game has expensive mtx for what the game is… it cant really be called an idle game if you have to check on it every hour unless you pay $5. Also the fact that there hasnt been an update in over a year means you shouldnt waste a single minute if your time or a single penny on this game

### 4/5 — Great game but the monsters

*2025-01-02, version 108*

I like playing the game but whenever i summon a monster I get the same one and It doesn’t give me a duplicate where I can’t  put the same monster down. Besides that I really like the game.

### 5/5 — Update and support

*2024-09-26, version 108*

Y’all really need to update and support this game a little bit more it’s super fun and still feels like it needs more add pvp or co op something to keep this community going

### 1/5 — Quá nhiều quảng cáo

*2024-08-22, version 108*

Hiện quảng cáo liên tục

## Frequently asked questions about Idle Monster TD

### What is Idle Monster TD?

Idle Monster TD is a tower defense game where players command monsters to defend their homeland from invading robots. It blends idle game mechanics with strategic tower defense gameplay, allowing for offline progress and automated resource generation.

### What are the key features of Idle Monster TD?

Key features include unlocking 44 unique monsters with different elemental skills, strategic placement of up to 10 monsters, 8 distinct maps requiring varied strategies, bi-weekly PvP tournaments, numerous upgrade paths, and offline gold earnings.

### How does Idle Monster TD make money?

The game is free to download and play, but it offers in-app purchases for various items and upgrades. It also includes advertisements, which can be removed or bypassed through certain in-app purchases.

### What platforms is Idle Monster TD available on?

While specific platforms are not detailed in the description, the application data indicates it is a mobile application, suggesting availability on iOS and Android devices.

### What is the main goal in Idle Monster TD?

The primary goal is to defend your base from endless waves of evil robots by strategically placing and upgrading your monsters. Players are encouraged to unlock new creatures, research technologies, and compete in PvP tournaments to progress and achieve high scores.

## Version history (last 5 releases)

### 108 — 2023-10-15

- Performance improvements.
- Bug fixes.

### 101 — 2022-02-28

Update v101 (February 28, 2022)

- Minor performance improvements.

Update v100 (February 24, 2022)

- Fixed the unintended color changes on some devices from the previous update.

Update v99 (February 22, 2022)

Miscellaneous:
- Added the new mandatory App Track Privacy prompt for iOS 14+ devices.
- Improved rewarded video ads experience.

Bug Fixes:
- Fixed bug where some players couldn't claim their PvP Tournament rewards.
- Fixed issue where the game would randomly crash.
- Fixed some unintended exploits.
- Fixed bug related to massive exp gains at the extreme late-game.

### 100 — 2022-02-24

Update v100 (February 24, 2022)

- Fixed the unintended color changes on some devices from the previous update.

Update v99 (February 22, 2022)

Miscellaneous:
- Added the new mandatory App Track Privacy prompt for iOS 14+ devices.
- Improved rewarded video ads experience.

Bug Fixes:
- Fixed bug where some players couldn't claim their PvP Tournament rewards.
- Fixed issue where the game would randomly crash.
- Fixed some unintended exploits.
- Fixed bug related to massive exp gains at the extreme late-game.

### 1.45 — 2022-02-23

Update 1.45 (February 22, 2022)

Miscellaneous:
- Added the new mandatory App Track Privacy prompt for iOS 14+ devices.
- Improved rewarded video ads experience.

Bug Fixes:
- Fixed bug where some players couldn't claim their PvP Tournament rewards.
- Fixed issue where the game would randomly crash.
- Fixed some unintended exploits.
- Fixed bug related to massive exp gains at the extreme late-game.

### 1.44 — 2021-04-26

Update 1.44 (April 23, 2021)

New Content:
• New achievement for consecutive waves passed.
• New leaderboard titles for consecutive waves passed and spell upgrade levels.

Changes:
• Challenge Map point rewards now scale a bit quicker at higher waves, encouraging you to push further (more information somewhere here).
• Challenge Map timer now exists at the bottom of the Challenge Map Menu when "energy" is below 3/3.
• Set a max level of 100 for the Cargo and Tech Ship HP reduction upgrades in the gem store.  Players who spent gems on levels above 100 were automatically refunded and had their levels reset.

Bug Fixes:
• Fixed bug where the Tournament leaderboards sometimes would not load, preventing you from claiming your rewards. 
• Fixed bug where Cargo Ships would sometimes spawn with 0 HP and be unkillable.

## Apps similar to Idle Monster TD

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Idle Monster TD: Tower Defense](https://appshunter.io/ios/app/idle-monster-td-tower-defense/id1608286308) | 4.7 (819) | Free | Games |
| [Summoners Greed: Idle Hero RPG](https://appshunter.io/ios/app/summoners-greed-idle-hero-rpg/id1258027083) | 4.9 (128,241) | Free | Games |
| [The Tower - Idle Tower Defense](https://appshunter.io/ios/app/the-tower-idle-tower-defense/id1575590830) | 4.2 (19,568) | Free | Games |
| [Zombie Idle Defense](https://appshunter.io/ios/app/zombie-idle-defense/id1509441400) | 4.7 (11,955) | Free | Games |
| [Idle Heroes - Idle Games](https://appshunter.io/ios/app/idle-heroes-idle-games/id1153461915) | 4.8 (106,585) | Free | Games |
| [Rush Royale: Tower Defense RPG](https://appshunter.io/ios/app/rush-royale-tower-defense-rpg/id1526121033) | 4.5 (95,328) | Free | Games |

## More apps by Swell Games LLC

- [Idle Hero Defense](https://appshunter.io/ios/app/idle-hero-defense/id1404480807)
- [Idle Hero TD](https://appshunter.io/ios/app/idle-hero-td/id1453373123)
- [Idle TD: Heroes vs Zombies](https://appshunter.io/ios/app/idle-td-heroes-vs-zombies/id1574130898)
- [Monster Tiles TD: Tower Wars](https://appshunter.io/ios/app/monster-tiles-td-tower-wars/id6449416723)
- [Idle Hero TD Tower Defense RPG](https://appshunter.io/ios/app/idle-hero-td-tower-defense-rpg/id6479284270)

All apps by Swell Games LLC: https://appshunter.io/developer/1608286310

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*