Comparison

Bloons Card Storm vs Underdark

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

Head to head
About

Bloons Card Storm

Engage in a strategic collectible card game with iconic characters. Build powerful decks, master hero abilities, and battle opponents in PvP or solo adventures. Craft unique cards and balance offense and defense to claim victory.

Highlights
  • Collectible card game mechanics
  • Hero abilities and unique characters
  • Deck building and card crafting
  • PvP and single-player modes
  • Cross-platform play
  • Balance offense and defense
Features
Read full description

The Storm gathers, and only true Heroes can stem the Bloon tide. Gather up your cards, choose your favorite Hero, and enter the Arena to claim victory! From the makers of Bloons TD 6 comes a revolutionary collectible card game featuring the fan-favorite Monkeys and Bloons, rendered and animated in gorgeous 3D. Develop deep strategies, build your collection by crafting awesome cards, and carefully construct decks to help you win PvP and single player games. Featuring 4 unique Heroes with 3 Hero Abilities each, 130+ cards at launch, and 5 different Arenas to battle on, the tactical combinations are endless! BALANCE OFFENSE AND DEFENSE Monkeys can't attack other Monkeys, so you'll need to stock up on both Bloon AND Monkey cards in order to win. Send Bloons swarming at your opponent, fend off opposing Bloon rushes with your Monkeys, and find that perfect balance essential for victory! USE HERO ABILITIES WISELY Playing Bloons will power up Hero Abilities that can turn the tide of battle in your favor. Whether it is Quincy with his bow or Gwen with her flamethrower, each Hero has a unique set of potent Hero Abilities. Choose them wisely! TEST YOURSELF IN SOLO ADVENTURES Looking for something more relaxing than fur-flying PvP action? Our solo Adventures are crafted single-player experiences that will test your deck building and game management skills to the limit. Try out the Prologue Adventures or support the game by buying the full DLC Adventures. FULLY CROSS-PLATFORM Take your collection of Bloons and Monkeys with you wherever you go, as Bloons Card Storm is fully cross-platform - just register your account and your progress stays with you. BUILD THE BEST DECKS Build crazy combo behemoths, fun theme decks, or use the latest meta decklists - the choice is yours! PLAY AGAINST YOUR FRIENDS Private match support at launch so you can challenge your friends to a game anywhere, anytime! Matchmaking is also fully cross-platform so what are you waiting for? Download now and join the Card Storm!

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!

Screenshots

Bloons Card Storm4 screens
Underdark4 screens

Verdict

The call

The clearest difference is update cadence: Underdark at every 4 days against Bloons Card Storm's every 3 weeks. Underdark also leads on review sentiment (72% vs 59%). 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. Bloons Card Storm sells 10 one-off in-app purchases and Underdark 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

Underdark holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 2.9K and 4.1K respectively. Written reviews point the same way: 59% of Bloons Card Storm's written reviews are positive against 72% of Underdark's.

UpkeepUpdate frequency

Bloons Card Storm ships an update every 3 weeks, Underdark every 4 days. The most recent releases landed on November 7, 2026 and November 9, 2026 respectively.

Scorecard2 real differences · 8 level
Bloons Card Storm versus Underdark: the parameters behind the verdict, then further details
ParameterBloons Card StormUnderdark
PriceFreeFree
Rating4.6 (2.9K ratings)4.8 (4.1K ratings) — better
Positive reviews58.5% of reviews72.0% of reviews — better
Number of ratings2.9K4.1K — better
Update frequencyEvery 3 weeksEvery 4 days — better
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
Size480 MB521 MB
Age rating9+4+
DeveloperNinja KiwiSeungHo Chung

Customer experience

Bloons Card Storm

All ratings2,815 ratings
Positive89.9%
Neutral3.5%
Negative6.6%
Written reviews357 reviews
Positive58.5%
Neutral13.4%
Negative28.0%

Underdark

All ratings4,109 ratings
Positive95.0%
Neutral2.2%
Negative2.8%
Written reviews837 reviews
Positive72.0%
Neutral9.0%
Negative19.0%

User reviews

Bloons Card Storm

From 2.9K App Store ratings

What we love

  • 👍 Great gameplay and strategy
  • 🥝 Unique Bloons-themed card game
  • 💎 Decent monetization, no predatory loot boxes
  • 🎨 Visually appealing art style

Room to improve

  • 🐢 Slow progression and resource acquisition
  • 🕹️ Clunky mobile interface, small UI elements
  • 🔍 Lack of content, limited single-player modes
  • 🤯 Matchmaking and connectivity issues

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

Bugs and requests

Bloons Card Storm

Reported bugs

3 issues
  • Game crashes and disconnects
  • Progression loss when opponents quit
  • Unresponsive UI and control issues

Requested features

4 requests
  • Ranked/competitive modes
  • More single-player content
  • Improved deck building and customization
  • Better rewards for completed matches

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

In-app purchases

10 purchases

Bloons Card Storm

One-time10
  • 2000 Universal Tokens$0.99
  • 10500 Universal Tokens$4.99
  • Obyn Hero Bundle$5.99
Show 7 more
  • Starter Pack$6.99
  • Founder's Pack$7.99
  • Holiday Bundle$8.99
  • Adora Hero Bundle$9.99
  • Amelia Hero Bundle$9.99
  • Amelia Mega Bundle$14.99
  • 44000 Universal Tokens$19.99
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

Questions

Is Bloons Card Storm free?
Bloons Card Storm 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, Bloons Card Storm or Underdark?
Underdark is rated higher. Bloons Card Storm averages 4.6 out of 5 from 2.9K ratings, while Underdark averages 4.8 from 4.1K ratings.
Do Bloons Card Storm or Underdark have ads?
Both Bloons Card Storm and Underdark show ads.
Which is updated more often, Bloons Card Storm or Underdark?
Bloons Card Storm ships an update every 3 weeks, and Underdark every 4 days. Most recently, Bloons Card Storm was updated on November 7, 2026 and Underdark on November 9, 2026.

Other comparisons