# Underdark vs Mirror Realms

The clearest difference is ratings volume: Underdark at 4.1K against Mirror Realms's 1. Mirror Realms's advantage is update cadence (daily vs every 4 days) and rating (5.0 vs 4.8). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Underdark sells 34 one-off in-app purchases and Mirror Realms sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Mirror Realms holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Underdark has 4.1K ratings behind it against 1, so its average is the more settled of the two.

Underdark ships an update every 4 days, Mirror Realms daily. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Underdark | Mirror Realms |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (4.1K ratings)](https://appshunter.io/ios/app/underdarkdefense/id6482025287/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mirror-realms/id6755287304/reviews)** |
| Number of ratings | **4.1K** | 1 |
| Positive reviews | 72.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 days | **Daily** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 520 MB | 43 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SeungHo Chung](https://appshunter.io/developer/1626940418) | [Michael Cozzolino](https://appshunter.io/developer/367780489) |

## 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 (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


### Mirror Realms

[App page](https://appshunter.io/ios/app/mirror-realms/id6755287304)

Control two mirrored orbs simultaneously in a minimalist arcade game. Master inverted gravity and synchronized controls across two distinct realms. Push your reflexes, timing, and focus to the limit with dynamic challenges and stunning visuals.

**Highlights:** Dual-control gameplay, Inverted gravity mechanics, Dynamic challenges and power-ups, Stunning space aesthetic, Global leaderboards, Haptic feedback

**Features:** macOS Compatibility

**In-app purchases (1)**

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


## Frequently asked questions

### Is Underdark free?

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

### Is Mirror Realms free?

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

### Which has better reviews, Underdark or Mirror Realms?

Mirror Realms is rated higher. Underdark averages 4.8 out of 5 from 4.1K ratings, while Mirror Realms averages 5.0 from 1 ratings.

### Do Underdark or Mirror Realms have ads?

Both Underdark and Mirror Realms show ads.

### Which is updated more often, Underdark or Mirror Realms?

Underdark ships an update every 4 days, and Mirror Realms daily. Most recently, Underdark was updated on November 1, 2026 and Mirror Realms on October 28, 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.*