# Loop Hero vs Underdark

The clearest difference is ads: Loop Hero at none against Underdark's shown. Underdark's advantage is update cadence (every 4 days vs every 10 days) and iOS requirement (13.0 vs 15.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Loop Hero sells 1 one-off in-app purchase and Underdark sells 34 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 — 4.9 for Loop Hero against 4.8 for Underdark. Both are backed by a comparable volume of ratings — 3.9K and 4K respectively. Written reviews are what separate them: 75% of Loop Hero's written reviews are positive against 72% of Underdark's.

Loop Hero ships an update every 10 days, Underdark every 4 days. The most recent releases landed on September 22, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Loop Hero | Underdark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (3.9K ratings)](https://appshunter.io/ios/app/loop-hero/id6464048549/reviews)** | [4.8 (4K ratings)](https://appshunter.io/ios/app/underdarkdefense/id6482025287/reviews) |
| Number of ratings | 3.9K | **4K** |
| Positive reviews | **75.1% of reviews** | 72.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 213 MB | 490 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Playdigious](https://appshunter.io/developer/1041387229) | [SeungHo Chung](https://appshunter.io/developer/1626940418) |

## What reviewers say

### Loop Hero

[App page](https://appshunter.io/ios/app/loop-hero/id6464048549)

Embark on a roguelike RPG adventure where you strategically place cards to create enemy encounters, buildings, and terrain. Equip your hero with powerful loot, expand your camp, and unlock new classes and cards to break an endless cycle of despair and save a forgotten world.

**Highlights:** Randomly generated expedition loops, Strategic card placement for trials, Loot collection for hero progression, Camp expansion and reconstruction, Unlockable classes and cards, Retro pixel art dark fantasy story

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Game | $6.99 | one-time |

**What reviewers like**

- 👍 Excellent mechanics
- 👍 Great replayability
- 👍 Charming graphics
- 👍 Unique and enjoyable experience
- 👍 Smooth gameplay

**What reviewers complain about**

- 🐛 Sound doesn't work
- 🐛 Crashes and freezes
- 🐛 Unresponsive after certain actions
- 🐛 Difficulty reading small text
- 🐛 Accidental card placement

**Reported bugs**

- Game crashes after defeating first boss
- Unplayable after initial progress
- Inability to progress past trial version

**Requested features**

- Portrait mode
- More classes/build diversity
- Improved UI/overlay customization
- Chinese language support


### 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 buffs, and level up your 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 and choose buffs, Hero abilities and enhancements, Earn trophies

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

**In-app purchases (34)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Event Package 1 | $0.99 | one-time |
| daily_package_01 | $0.99 | one-time |
| season_growth_1 | $0.99 | one-time |
| dailyshop_1 | $1.99 | one-time |
| blade_pakcage | $2.99 | one-time |
| daily_package_02 | $2.99 | one-time |
| exp_2x | $3.49 | one-time |
| skin_30501 | $3.49 | one-time |
| Event Package 2 | $3.99 | one-time |
| pet_package | $4.99 | one-time |
| weekly_package_01 | $6.99 | one-time |
| add_speed | $7.49 | one-time |
| pass_hero_115 | $7.49 | one-time |
| pass_hero_102 | $7.49 | one-time |
| pass_hero_110 | $7.49 | one-time |
| season_superpass_1 | $7.99 | one-time |
| pack_remove_ads | $7.99 | one-time |
| daily_package_03 | $7.99 | one-time |
| hero_legend_santa | $8.99 | one-time |
| hero_legend_tower | $8.99 | one-time |
| hero_legend_armor | $8.99 | one-time |
| Event Package 3 | $8.99 | one-time |
| hero_legend_joker | $8.99 | one-time |
| hero_legend_necromancer | $8.99 | one-time |
| hero_legend_chicken | $8.99 | one-time |
| tower_legend_614 | $8.99 | one-time |
| ud_pack_20106 | $8.99 | one-time |
| tower_legend_628 | $8.99 | one-time |
| pack_remove_ads2 | $10.99 | one-time |
| Event Package 4 | $12.99 | one-time |
| season_level_1 | $16.99 | one-time |
| season_stage_1 | $16.99 | one-time |
| Event Package 5 | $17.99 | 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


## Frequently asked questions

### Is Loop Hero free?

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

### Is Underdark free?

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

### Which has better reviews, Loop Hero or Underdark?

Loop Hero is rated higher. Loop Hero averages 4.9 out of 5 from 3.9K ratings, while Underdark averages 4.8 from 4K ratings.

### Do Loop Hero or Underdark have ads?

Underdark shows ads; Loop Hero does not.

### Which is updated more often, Loop Hero or Underdark?

Loop Hero ships an update every 10 days, and Underdark every 4 days. Most recently, Loop Hero was updated on September 22, 2026 and Underdark on September 24, 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.*