# Underdark vs GuardRush

The clearest difference is in-app purchases: GuardRush at none against Underdark's 10. Underdark's advantage is update cadence (every 4 days vs fortnightly) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Underdark sells 10 one-off in-app purchases. GuardRush asks for nothing beyond the download.

Underdark ships an update every 4 days, GuardRush fortnightly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Underdark | GuardRush |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4.1K ratings)](https://appshunter.io/ios/app/underdarkdefense/id6482025287/reviews)** | — |
| Number of ratings | **4.1K** | — |
| Positive reviews | 72.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 4 days** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 520 MB | 14 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [SeungHo Chung](https://appshunter.io/developer/1626940418) | [Ege GUNES](https://appshunter.io/developer/1873952812) |

## What reviewers say

### Underdark

[App page](https://appshunter.io/ios/app/underdarkdefense/id6482025287)

Defend the Eternal Flame from relentless dark forces in this tactical tower defense game. Strategically place towers, choose powerful buffs, and level up unique heroes to forge an impenetrable defense. Enjoy one-handed gameplay for strategic fun anytime, anywhere.

**Highlights:** Defend the Eternal Flame, One-handed gameplay, Customize defense strategy, Level up heroes, Strategic tower placement, Choose buffs

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| daily_package_01 | $0.99 | one-time |
| blade_pakcage | $2.99 | one-time |
| daily_package_02 | $2.99 | one-time |
| exp_2x | $3.49 | one-time |
| Event Package 2 | $3.99 | one-time |
| add_speed | $7.49 | one-time |
| season_superpass_1 | $7.99 | one-time |
| pack_remove_ads | $7.99 | one-time |
| pack_remove_ads2 | $10.99 | one-time |
| season_hyperpass_1 | $18.99 | one-time |

**What reviewers like**

- 🚀 Addictive gameplay
- 👍 Generous with rewards
- 🚀 Smooth performance
- 👍 No forced ads
- 👍 Unique tower defense mechanics

**What reviewers complain about**

- 🐛 Multiplayer issues
- 🔋 Battery drain
- 🔒 Paywall for progression
- 🔒 Excessive microtransactions
- 🔒 Confusing UI with too many menus

**Reported bugs**

- Goblin tower factory causing game slowdown
- Consecutive login rewards reset after updates
- Invisible towers in multiplayer

**Requested features**

- Ability to rotate towers
- Move towers after placement
- More enemy variety and animations
- Improved co-op mode
- Simplified progression system


### GuardRush

[App page](https://appshunter.io/ios/app/guardrush-gate-defense/id6791997758)

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

**In-app purchases:** none


## Frequently asked questions

### Is Underdark free?

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

### Is GuardRush free?

GuardRush is free to download, with no in-app purchases.

### Do Underdark or GuardRush have ads?

Both Underdark and GuardRush show ads.

### Which is updated more often, Underdark or GuardRush?

Underdark ships an update every 4 days, and GuardRush fortnightly. Most recently, Underdark was updated on November 5, 2026 and GuardRush on October 31, 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.*