# Underdark vs Block Clash

Underdark and Block Clash both sit at 4.8 stars, but that hides the real split: 72% of Underdark's written reviews are positive against 34% of Block Clash's. Underdark also leads on update cadence (every 4 days vs every 11 days) and ratings volume (4.1K vs 1.1K). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Underdark sells 34 one-off in-app purchases and Block Clash sells 20 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 Block Clash. Both are backed by a comparable volume of ratings — 4.1K and 1.1K respectively. Written reviews are what separate them: 72% of Underdark's written reviews are positive against 34% of Block Clash's.

Underdark ships an update every 4 days, Block Clash every 11 days. Both last shipped on October 30, 2026.

## The numbers

| Metric | Underdark | Block Clash |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4.1K ratings)](https://appshunter.io/ios/app/underdarkdefense/id6482025287/reviews)** | [4.7 (1.1K ratings)](https://appshunter.io/ios/app/block-clash-td/id6745582734/reviews) |
| Number of ratings | **4.1K** | 1.1K |
| Positive reviews | **72.0% of reviews** | 34.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 4 days** | Every 11 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 508 MB | 237 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SeungHo Chung](https://appshunter.io/developer/1626940418) | [Neptune Company](https://appshunter.io/developer/539389569) |

## 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 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


### Block Clash

[App page](https://appshunter.io/ios/app/block-clash-td/id6745582734)

Engage in hyper-casual tower defense battles with random elements. Explore new events, unlock powerful skills like invincibility, and expand your gameplay with additional stages. Enjoy balance adjustments and a revamped profile screen.

**Highlights:** Hyper-casual random defense, New event: Treasure Expedition, Invincibility skill, Expanded stages (Chapter 30), Revive invincibility buff, Profile screen

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

**In-app purchases (20)**

| Purchase | Price | Billing |
| --- | --- | --- |
| small_noads_ticket | $0.99 | one-time |
| starter_package | $0.99 | one-time |
| insufficient_energy_package | $0.99 | one-time |
| small_silvercoin_currency | $0.99 | one-time |
| medium_noads_ticket | $1.99 | one-time |
| small_ticket_package | $1.99 | one-time |
| Booster Package | $2.99 | one-time |
| large_noads_ticket | $3.99 | one-time |
| base_no_Ads_package | $3.99 | one-time |
| medium_ticket_package | $4.99 | one-time |
| medium_coin_currency | $4.99 | one-time |
| reward_multi_package | $6.99 | one-time |
| jumbo_no_Ads_package | $6.99 | one-time |
| pass_key_premium | $7.99 | one-time |
| large_coin_currency | $9.99 | one-time |
| Extra_noads_ticket | $11.99 | one-time |
| big_ticket_package | $12.99 | one-time |
| Extra_coin_currency | $19.99 | one-time |
| Huge_noads_ticket | $24.99 | one-time |
| Huge_coin_currency | $49.99 | one-time |

**What reviewers like**

- 👍 Fun game
- 🕹️ Moderate strategy and play options
- 💰 Doesn't inundate with ads

**What reviewers complain about**

- 🐛 Bugs and glitches (mobs cease to spawn, damage reduced, progress lost)
- 🔧 Needs more polish

**Reported bugs**

- Mobs cease to spawn in certain levels
- Damage reduced after update
- Progress lost after update
- Unable to proceed to next level after beating a stage

**Requested features**

- More levels and content
- Improved stability and bug fixes


## Frequently asked questions

### Is Underdark free?

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

### Is Block Clash free?

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

### Which has better reviews, Underdark or Block Clash?

Underdark is rated higher. Underdark averages 4.8 out of 5 from 4.1K ratings, while Block Clash averages 4.7 from 1.1K ratings.

### Do Underdark or Block Clash have ads?

Both Underdark and Block Clash show ads.

### Which is updated more often, Underdark or Block Clash?

Underdark ships an update every 4 days, and Block Clash every 11 days. Most recently, Underdark was updated on October 30, 2026 and Block Clash on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*