# Idle Monster TD vs Rocket Invaders

Idle Monster TD and Rocket Invaders are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Idle Monster TD sells 11 one-off in-app purchases and Rocket Invaders sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Idle Monster TD ships an update weekly, Rocket Invaders every 9 days. The most recent releases landed on October 21, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Idle Monster TD | Rocket Invaders |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (2.6K ratings)](https://appshunter.io/ios/app/idle-monster-td/id1493941058/reviews)** | — |
| Number of ratings | **2.6K** | — |
| Positive reviews | 63.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | Free with in-app purchases | — |
| Size | 116 MB | 258 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Swell Games LLC](https://appshunter.io/developer/1608286310) | [Krada Studio Corp](https://appshunter.io/developer/1821603226) |

## What reviewers say

### Idle Monster TD

[App page](https://appshunter.io/ios/app/idle-monster-td/id1493941058)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (11)**

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

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

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

**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)


### Rocket Invaders

[App page](https://appshunter.io/ios/app/rocket-invaders/id6747470112)

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Permanently Unlock All Weapons | $0.99 | one-time |
| Save Sector Progress | $0.99 | one-time |
| Faster Fuel Pipe Transfers | $0.99 | one-time |
| Slower Bonus Crate Expiry Time | $0.99 | one-time |
| Slower Wave Timers | $0.99 | one-time |
| Remove Ads & Extra Resource | $2.99 | one-time |
| Full Converters at New Planet | $2.99 | one-time |
| Rocket Mega Pack | $4.99 | one-time |


## Frequently asked questions

### Is Idle Monster TD free?

Idle Monster TD is free to download, with in-app purchases available.

### Is Rocket Invaders free?

Rocket Invaders is free to download, with in-app purchases available.

### Do Idle Monster TD or Rocket Invaders have ads?

Both Idle Monster TD and Rocket Invaders show ads.

### Which is updated more often, Idle Monster TD or Rocket Invaders?

Idle Monster TD ships an update weekly, and Rocket Invaders every 9 days. Most recently, Idle Monster TD was updated on October 21, 2026 and Rocket Invaders on October 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*