# Crazy TD vs Idle Rune Foundry

The clearest difference is rating: Idle Rune Foundry at 5.0 against Crazy TD's 4.0. Idle Rune Foundry also leads on update cadence (every 2 weeks vs every 3 months) and monetization model (free vs free with in-app purchases). Crazy TD's advantage is device support. On price, ratings volume, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Crazy TD sells 1 one-off in-app purchase and Idle Rune Foundry sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Idle Rune Foundry holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Crazy TD ships an update every 3 months, Idle Rune Foundry every 2 weeks. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Crazy TD | Idle Rune Foundry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/crazy-td/id906263409/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/idle-rune-foundry/id6762006920/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | — |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 69 MB |
| Requires iOS | 17.5 | **17.0** |
| Devices | **iPhone, iPad** | — |
| Age rating | 12+ | 4+ |
| Developer | [Ang Chee Hong](https://appshunter.io/developer/1420817458) | [Michael Eakins](https://appshunter.io/developer/1890494224) |

## What reviewers say

### Crazy TD

[App page](https://appshunter.io/ios/app/crazy-td/id906263409)

Defend your tower from an invading red army by tapping to shoot. Avoid friendly fire with the blue army and earn points by eliminating enemies and birds. Compete on leaderboards and unlock achievements in this fast-paced defense game.

**Highlights:** Tap to shoot enemies, Swipe for machine gun action, Defend against red army, Avoid shooting blue army, Earn points for kills, Game Center Leaderboard, Game Center Achievements

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove In-Game Ads | $0.99 | one-time |


### Idle Rune Foundry

[App page](https://appshunter.io/ios/app/idle-rune-foundry/id6762006920)

Forge mystical runes by tapping and building an army of automated workers. Upgrade your forge, enchant items, and prestige for permanent power. Earn resources even while offline.

**Highlights:** Tap-to-forge gameplay with critical strikes, Automated rune production with various worker types, Deep upgrade and enchanting systems, Prestige system for permanent progression, Offline earnings and progression, Customizable forge skins, Offline play supported

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pouch of Gems | $0.99 | one-time |
| Remove Ads | $2.99 | one-time |
| Chest of Gems | $3.99 | one-time |
| Legendary Hoard | $6.99 | one-time |
| Vault of Gems | $14.99 | one-time |


## Frequently asked questions

### Is Crazy TD free?

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

### Is Idle Rune Foundry free?

Idle Rune Foundry is free to download, with in-app purchases available.

### Which has better reviews, Crazy TD or Idle Rune Foundry?

Idle Rune Foundry is rated higher. Crazy TD averages 4.0 out of 5 from 2 ratings, while Idle Rune Foundry averages 5.0 from 1 ratings.

### Which is updated more often, Crazy TD or Idle Rune Foundry?

Crazy TD ships an update every 3 months, and Idle Rune Foundry every 2 weeks. Most recently, Crazy TD was updated on October 29, 2026 and Idle Rune Foundry on October 25, 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.*