Comparison

Galaxy Defense vs DropGem

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

Head to head
About

Galaxy Defense

Engage in classic random tower defense with a twist. Summon, swap, and merge mythical allies from three unique races to annihilate relentless waves of enemies. Prove your strategic skills to save the galaxy.

Highlights
  • Random Tower Defense gameplay
  • Summon, Swap, and Merge heroes
  • Three unique races: Humans, Mutants, Aliens
  • Strategic hero defense
  • Challenging stages
Features
Read full description

"You want a piece of me, Boy?" Relentless waves of powerful Voids are closing in from all directions. A lone commander, armed with nothing but a single gun, stands against them! That unmistakable thrill—classic Random Tower Defense gameplay! Now easier, more exhilarating, and irresistibly fun! Enjoy Galaxy Defense : Coop TD! on mobile! Summon, Swap, and Merge! Summon mighty Mythical Allies and annihilate your enemies! ** Three Unique Races! ** - Humans! – Master advanced technology for wide-range attacks! - Mutants! – Crush foes with deadly tentacle strikes! - Aliens! – Harness psionic energy for devastating area attacks! ** Random Tower Defense Mechanics! ** - Summon! – Find the perfect spot for your defenses! - Swap! – Adapt to the situation in real time! - Merge! – Fuse heroes to unleash overwhelming power! Can you save the universe from the Voids? Do you have what it takes to become the ultimate commander? Answer the call and fight back the void—right now! The entire galaxy is waiting for you! A perfect blend of strategy and luck in a thrilling hero defense game! Challenge intense stages and prove your commanding skills! Plus, your cute workers are good to go sir!

About

DropGem

Features
Read full description

Meet Drop Gem — your next puzzle challenge! Merge matching gems to discover 12 sparkling types, and work your way up to the ultimate prize: the Pink Diamond. How high can you score? Put your skills to the test and climb the leaderboard! Drop. Merge. Shine.

Screenshots

Galaxy Defense4 screens
DropGem4 screens

Verdict

The call

The clearest difference is ads: DropGem at none against Galaxy Defense's shown. On price, update cadence, in-app purchases and device support 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. Galaxy Defense sells 10 one-off in-app purchases and DropGem sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Galaxy Defense ships an update weekly, DropGem every 2 weeks. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 9 level
Galaxy Defense versus DropGem: the parameters behind the verdict, then further details
ParameterGalaxy DefenseDropGem
PriceFreeFree
Rating4.6 (21 ratings) — better—
Positive reviews86.2% of reviews—
Number of ratings21 — better—
Update frequencyWeekly — betterEvery 2 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size531 MB245 MB
Age rating9+4+
DeveloperTeamsparta Inc.Sigma10 Games

In-app purchases

10 purchases

Galaxy Defense

One-time10
  • sd_drizzle_key_1$0.49
  • sd_drizzle_key_2$0.99
  • sd_drizzle_key_3$1.99
Show 7 more
  • welcome_package$1.99
  • 7d pass$2.99
  • sd_drizzle_key_4$3.99
  • Newbie package$3.99
  • sd_drizzle_key_5$5.99
  • sd_drizzle_key_7$9.99
  • VVIP$9.99
4 purchases

DropGem

One-time4
  • Item Pack 1$0.99
  • Item Pack 2$2.99
  • Ad Remove Package$3.49
Show 1 more
  • Item Pack 3$7.99

Questions

Is Galaxy Defense free?
Galaxy Defense is free to download, with in-app purchases available.
Is DropGem free?
DropGem is free to download, with in-app purchases available.
Do Galaxy Defense or DropGem have ads?
Galaxy Defense shows ads; DropGem does not.
Which is updated more often, Galaxy Defense or DropGem?
Galaxy Defense ships an update weekly, and DropGem every 2 weeks. Most recently, Galaxy Defense was updated on November 4, 2026 and DropGem on October 31, 2026.

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