Comparison

Underdark vs DDDigger

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 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
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

DDDigger

Embark on a planet conquest adventure as cute aliens dig deep to reach the planet's core. Upgrade gear, build factories for resources, and battle giant worms and monsters lurking underground. Enjoy thrilling battles and charming visuals in this offline digging game.

Highlights
  • Digging to planet's core
  • Upgrade powerful gear
  • Build resource factories
  • Battle underground monsters
  • Easy tap controls
  • Offline gameplay
Features
Read full description

Cute Alien's Planet Conquest Adventure! The square-shaped aliens have begun their mission to conquer a new planet! Their ultimate goal is to dig deep into the ground, reach the planet's core, and achieve absolute domination. But beware—giant worms and terrifying monsters are lurking underground! Upgrade your powerful gear, build factories to earn resources, defeat these enemies, and keep digging toward the core with advanced drills! Game Features ▶ Easy and Simple Controls A single tap lets your alien jump on its board! Anyone can dig into this game with ease. ▶ Thrilling Adventure and Battles Experience the nail-biting action as you battle monsters deep underground! ▶ Test your luck! If you want to become even stronger, you'll need your brilliant strategy and a bit of luck! ▶ Powerful Gear Upgrades Enhance your equipment, including drones, missiles, and machine guns, or unlock better drills to dig your way through! ▶ Unstoppable Fever Mode Activate Fever Mode to unleash invincible power and quickly approach the planet's core! ▶ Charming Visuals Discover various planets filled with square-shaped aliens and vibrant, colorful backgrounds. ▶ Offline Adventure Enjoy the game anytime, anywhere without an internet connection! Are you ready to dig deeper, manage factories, operate powerful drills, defeat giant monsters, and reach the planet's core? Cute aliens are waiting for your help! Grab your tools, start digging, and conquer the planet! Download now and begin your thrilling digging adventure! ---- - Contact Us: support@treeplla.com - Terms of Service: https://termsofservice.treeplla.com/ - Privacy Policy: https://privacy.treeplla.com/language

Screenshots

Underdark4 screens
DDDigger4 screens

Verdict

The call

Underdark and DDDigger both sit at 4.8 stars, but that hides the real split: 72% of Underdark's written reviews are positive against 44% of DDDigger's. Underdark also leads on update cadence (every 4 days vs every 9 days) and iOS requirement (13.0 vs 15.0). DDDigger's advantage is ratings volume (18K vs 4.1K). On price, rating, ads and in-app purchases 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 34 one-off in-app purchases and DDDigger sells 28 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 4.8 for DDDigger. Both are backed by a comparable volume of ratings — 4.1K and 18K respectively. Written reviews are what separate them: 72% of Underdark's written reviews are positive against 44% of DDDigger's.

UpkeepUpdate frequency

Underdark ships an update every 4 days, DDDigger every 9 days. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

Scorecard4 real differences · 6 level
Underdark versus DDDigger: the parameters behind the verdict, then further details
ParameterUnderdarkDDDigger
PriceFreeFree
Rating4.8 (4.1K ratings)4.8 (18K ratings)
Positive reviews72.0% of reviews — better43.8% of reviews
Number of ratings4.1K18K — better
Update frequencyEvery 4 days — betterEvery 9 days
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size508 MB297 MB
Age rating4+4+
DeveloperSeungHo ChungNeptune Company

Customer experience

Underdark

All ratings4,088 ratings
Positive95.1%
Neutral2.2%
Negative2.8%
Written reviews833 reviews
Positive72.0%
Neutral8.9%
Negative19.1%

DDDigger

All ratings17,883 ratings
Positive95.7%
Neutral2.4%
Negative1.9%
Written reviews1,044 reviews
Positive43.8%
Neutral11.1%
Negative45.1%

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

DDDigger

From 18K App Store ratings

What we love

  • 👍 Very fun game
  • 🚀 Well-programmed and attractive design
  • 💡 Familiar and interesting game concept

Room to improve

  • 🐛 Glitches and bugs after updates
  • 💰 Game becomes pay-to-win with expensive upgrades
  • 🔍 Too many ads interrupting gameplay
  • 🔋 Damage and progression nerfs make the game unplayable

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

DDDigger

Reported bugs

3 issues
  • Game gets stuck in a glitched area after completing all worlds
  • Energy system not working properly, unable to play after depleting energy
  • Inconsistent language support despite claims of multiple languages

Requested features

3 requests
  • Option to skip animation for slot machine
  • Ability to permanently upgrade workers
  • More content and replay value beyond 6 worlds

In-app purchases

34 purchases

Underdark

One-time34
  • Event Package 1$0.99
  • daily_package_01$0.99
  • season_growth_1$0.99
Show 31 more
  • dailyshop_1$1.99
  • blade_pakcage$2.99
  • daily_package_02$2.99
  • exp_2x$3.49
  • skin_30501$3.49
  • Event Package 2$3.99
  • pet_package$4.99
  • weekly_package_01$6.99
  • add_speed$7.49
  • pass_hero_115$7.49
  • pass_hero_102$7.49
  • pass_hero_110$7.49
  • season_superpass_1$7.99
  • pack_remove_ads$7.99
  • daily_package_03$7.99
  • hero_legend_santa$8.99
  • hero_legend_tower$8.99
  • hero_legend_armor$8.99
  • Event Package 3$8.99
  • hero_legend_joker$8.99
  • hero_legend_necromancer$8.99
  • hero_legend_chicken$8.99
  • tower_legend_614$8.99
  • ud_pack_20106$8.99
  • tower_legend_628$8.99
  • pack_remove_ads2$10.99
  • Event Package 4$12.99
  • season_level_1$16.99
  • season_stage_1$16.99
  • Event Package 5$17.99
  • season_hyperpass_1$18.99
28 purchases

DDDigger

One-time28
  • Emergency Ad Skip Pack$0.99
  • Ad Skip Pack$0.99
  • Ad Skip Full Package$1.99
Show 25 more
  • Super Galaxy Pack 2$2.99
  • Welcome Pack01$2.99
  • Event Pack 01$2.99
  • Dicebuster Pack 01$2.99
  • AD Skip Ticket Pack 2$2.99
  • AD Skip Ticket Pack 1$2.99
  • Elite Pass$4.99
  • LIMTED PACK 2$4.99
  • LIMTED PACK 1$4.99
  • Star Pack 01$4.99
  • Warpstone Pack 01$4.99
  • Upgrade Core Pack$5.99
  • Speed Up Pack$5.99
  • AD Skip Ticket Pack 3$6.99
  • AD Skip Ticket Pack 4$6.99
  • Super Galaxy Pack 1$8.99
  • Master Pass$9.99
  • Chrono Dragon$9.99
  • Event Pack 02$9.99
  • Crystal 03$9.99
  • AD Skip Ticket Pack 5$14.99
  • Chrono Dragon Pack$18.99
  • Crystal 04$19.99
  • Crystal 05$47.99
  • Crystal 06$99.99

Questions

Is Underdark free?
Underdark is free to download, with in-app purchases available.
Is DDDigger free?
DDDigger is free to download, with in-app purchases available.
Which has better reviews, Underdark or DDDigger?
Underdark and DDDigger are both rated 4.8 out of 5 on the App Store, from 4.1K and 18K ratings respectively.
Do Underdark or DDDigger have ads?
Both Underdark and DDDigger show ads.
Which is updated more often, Underdark or DDDigger?
Underdark ships an update every 4 days, and DDDigger every 9 days. Most recently, Underdark was updated on October 16, 2026 and DDDigger on October 14, 2026.

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