# Underdark vs Geometry Tower

Underdark and Geometry Tower both sit at 4.8 stars, but that hides the real split: 72% of Underdark's written reviews are positive against 27% of Geometry Tower's. Underdark also leads on update cadence (every 4 days vs fortnightly). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Underdark sells 10 one-off in-app purchases and Geometry Tower sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for Underdark against 4.7 for Geometry Tower. Both are backed by a comparable volume of ratings — 4.1K and 4.7K respectively. Written reviews are what separate them: 72% of Underdark's written reviews are positive against 27% of Geometry Tower's.

Underdark ships an update every 4 days, Geometry Tower fortnightly. Both last shipped on November 12, 2026.

## The numbers

| Metric | Underdark | Geometry Tower |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4.1K ratings)](https://appshunter.io/ios/app/underdarkdefense/id6482025287/reviews)** | [4.7 (4.7K ratings)](https://appshunter.io/ios/app/geometry-tower-idle-defense/id6499506776/reviews) |
| Number of ratings | 4.1K | **4.7K** |
| Positive reviews | **72.1% of reviews** | 26.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 4 days** | Fortnightly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 521 MB | 265 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SeungHo Chung](https://appshunter.io/developer/1626940418) | [CYBERJOY LIMITED](https://appshunter.io/developer/1602455961) |

## 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 growth 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


### Geometry Tower

[App page](https://appshunter.io/ios/app/geometry-tower-idle-defense/id6499506776)

Engage in strategic tower defense battles with roguelike elements. Upgrade your tower, collect resources, and refine your tactics to withstand endless waves of enemies. Enjoy stylized geometric art and addictive idle gameplay.

**Highlights:** Roguelike gameplay with upgrade choices, Idle tower defense with resource collection, Strategic tower upgrades and research, Endless waves of enemies, Stylized geometric art design

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Golden Piggy 1 | $2.99 | one-time |
| Pack 1 | $2.99 | one-time |
| Common Battle Pass | $4.99 | one-time |
| Pack 2 | $4.99 | one-time |
| Delux Monthly Card | $9.99 | one-time |
| Rare Battle Pass | $9.99 | one-time |
| Pack 4 | $9.99 | one-time |
| Pack 5 | $19.99 | one-time |
| Pack 6 | $29.99 | one-time |
| Delux Life Time Card | $49.99 | one-time |

**What reviewers like**

- 🚀 Simple yet challenging gameplay
- 👍 Attractive visuals
- 🎮 Fun for a while

**What reviewers complain about**

- 🔍 Difficulty spike after early levels
- 💰 Heavily monetized with aggressive in-app purchases
- 🔁 Repetitive gameplay
- 🐛 Bugs and crashes
- 🔋 Performance issues on some devices

**Reported bugs**

- Ads causing game freezes and crashes
- Inability to rejoin battles after ad interruptions
- Weapon/upgrade selection issues

**Requested features**

- Add an endless mode
- Improve weapon/upgrade selection and progression
- Optimize performance and reduce overheating
- Reduce reliance on ads and in-app purchases


## Frequently asked questions

### Is Underdark free?

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

### Is Geometry Tower free?

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

### Which has better reviews, Underdark or Geometry Tower?

Underdark is rated higher. Underdark averages 4.8 out of 5 from 4.1K ratings, while Geometry Tower averages 4.7 from 4.7K ratings.

### Do Underdark or Geometry Tower have ads?

Both Underdark and Geometry Tower show ads.

### Which is updated more often, Underdark or Geometry Tower?

Underdark ships an update every 4 days, and Geometry Tower fortnightly. Most recently, Underdark was updated on November 12, 2026 and Geometry Tower on November 12, 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.*