Comparison

Underdark vs Geometry Tower

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Underdark

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
Read full description

Defend the Flame from the dark! Level up, strategically place towers, and choose buffs to grow stronger. Keep the light alive! Defend the Eternal Flame: Experience the thrill of defending the flame from hordes of dark forces that besiege it! Feel the exhilaration as you clear stages, with each victory more satisfying than the last. One-Handed Gameplay: Enjoy easy-to-master controls, designed for one-handed play. Perfect for strategic fun anytime, anywhere. Customize Your Defense Strategy: Select buffs and strategically place towers to forge your path of resistance. As you level up and choose your growth buffs, your defense becomes an impenetrable fortress. Heroic Stand: Choose your guardians to stand against the night. Each hero brings unique abilities to the battlefield. Earn trophies, level up, and enhance your heroes to ensure the flame flickers on through the darkest nights!

About

Geometry Tower

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
Read full description

Defend your tower with strategy in battles, and enjoy exciting challenges of this Roguelike game! -Roguelike Gameplay Choose from numbers of upgrades to make it an indestructible tower after endless waves of enemies in roguelike battles. Experience the fun of Roguelike! -Idle Tower Defense Addictive tower defense gameplay with idle mechanism. Easy to play, defend against the attacks from enemies with simply clicks. Collect resources from battles to level up the ATK and HP of your tower. In the meantime, develop the researches of your tower to power up. -Defeat With Strategy Upgrade your tower to be stronger with strategy and continue to refine your strategy with each battle. You have to defend the tower from waves of enemies to the last second. Prove your tactical skills in these thrilling challenges and achieve the victory. - Stylized Art Design Elements in the game are designed with simple geometric shapes in a stylized way.

Screenshots

Underdark4 screens
Geometry Tower4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard2 real differences · 8 level
Underdark versus Geometry Tower: the parameters behind the verdict, then further details
ParameterUnderdarkGeometry Tower
PriceFreeFree
Rating4.8 (4.1K ratings) — better4.7 (4.7K ratings)
Positive reviews72.1% of reviews — better26.5% of reviews
Number of ratings4.1K4.7K — better
Update frequencyEvery 4 days — betterFortnightly
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size521 MB265 MB
Age rating4+4+
DeveloperSeungHo ChungCYBERJOY LIMITED

Customer experience

Underdark

All ratings4,109 ratings
Positive95.0%
Neutral2.2%
Negative2.8%
Written reviews838 reviews
Positive72.1%
Neutral8.9%
Negative19.0%

Geometry Tower

All ratings4,690 ratings
Positive91.1%
Neutral1.8%
Negative7.1%
Written reviews664 reviews
Positive26.5%
Neutral15.1%
Negative58.4%

User reviews

Underdark

From 4.1K App Store ratings

What we love

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

Room to improve

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

Geometry Tower

From 4.7K App Store ratings

What we love

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

Room to improve

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

Bugs and requests

Underdark

Reported bugs

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

Requested features

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

Geometry Tower

Reported bugs

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

Requested features

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

In-app purchases

10 purchases

Underdark

One-time10
  • daily_package_01$0.99
  • blade_pakcage$2.99
  • daily_package_02$2.99
Show 7 more
  • exp_2x$3.49
  • Event Package 2$3.99
  • add_speed$7.49
  • season_superpass_1$7.99
  • pack_remove_ads$7.99
  • pack_remove_ads2$10.99
  • season_hyperpass_1$18.99
10 purchases

Geometry Tower

One-time10
  • Golden Piggy 1$2.99
  • Pack 1$2.99
  • Common Battle Pass$4.99
Show 7 more
  • Pack 2$4.99
  • Delux Monthly Card$9.99
  • Rare Battle Pass$9.99
  • Pack 4$9.99
  • Pack 5$19.99
  • Pack 6$29.99
  • Delux Life Time Card$49.99

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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