Comparison

Hole Busters 3D vs Stack 21

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

Head to head
About

Hole Busters 3D

Control a powerful black hole to swallow objects in various themed environments. Grow your black hole by devouring more items to overcome challenges. This game offers a relaxing yet brain-exercising experience with strategic puzzle-solving.

Highlights
  • Control a powerful black hole
  • Shuttle through different theme maps
  • Rationally arrange swallowing order
  • Black hole grows larger with each swallow
  • Richer theme maps and models
  • Upgrade your black hole indefinitely
  • Excellent physics and graphics
Features
Read full description

Welcome to Hole Busters 3D! You will control a powerful black hole, shuttle through different theme models and maps, rationally arrange the order of swallowing, guiding it to devour objects. Your black hole will grow larger with each swallow, and the more you swallow, the stronger and bigger your black hole will become! Help you overcome more complex obstacles and challenges. This game is perfect for relaxing and challenging yourself. It combines strategy and puzzle solving in a relaxed environment, making it ideal for those who like to relax but exercise their brains. Game features 1. Richer and more beautiful theme maps and models Refuse to repeat the experience day after day. Food shops, clothing stores, department stores, farms, the ocean... More topics to explore. A large number of exquisite models, open to devour the visual feast. 2. Upgrade your black hole indefinitely Bigger black holes if you can. Free props start help, black hole upgrade faster! Bigger! 3. Excellent physics and graphics Smooth engulf a large number of items, flowing like silky decompression. The picture is bright and beautiful, bringing a good mood of the day. 4. A relaxing puzzle solving experience Freedom to control the route of travel. No need to wait, anytime, anywhere open to devour. Relaxing music, gentle sound effects, enjoy the ear spa while eating. Get ready to master black hole physics and enjoy a fun-filled journey!

About

Stack 21

Read full description

Stack 21 is a simple number-stacking puzzle game that’s easy to learn and surprisingly hard to put down. Choose numbered tiles and build your stack toward 21. Hit exactly 21 to clear the stack and build your streak. Go over 21 and you take a strike. Three strikes ends the game. Think ahead, watch the total, and see how high you can score. • Simple, fast puzzle gameplay • Streak bonuses for consecutive clears • Local high-score tracking • Works offline • No account required • No ads • No in-app purchases • No tracking Your game progress and high score stay on your device. Stack 21 is published by Doleman Enterprises LLC.

Screenshots

Hole Busters 3D4 screens
Stack 214 screens

Verdict

The call

The clearest difference is in-app purchases: Stack 21 at none against Hole Busters 3D's 20. Stack 21 also leads on ads (none vs shown). Hole Busters 3D's advantage is chart position (#58 vs unranked) and device support (3 vs 1). On price 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. Hole Busters 3D sells 20 one-off in-app purchases. Stack 21 asks for nothing beyond the download.

Scorecard5 real differences · 6 level
Hole Busters 3D versus Stack 21: the parameters behind the verdict, then further details
ParameterHole Busters 3DStack 21
PriceFreeFree
Rating4.9 (18K ratings) — better—
Positive reviews38.2% of reviews—
Number of ratings18K — better—
Update frequencyEvery 6 days—
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#58 — better—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.6
Further details — not scored
Size825 MB3 MB
Age rating4+4+
DeveloperFUNSEA LIMITEDDoleman Enterprises

Bugs and requests

Hole Busters 3D

Reported bugs

2 issues
  • Items suspended too high to collect in levels 198, 434, and 906
  • Impossible to progress in level 198 due to suspended items

Requested features

3 requests
  • Fix level 198 glitch
  • Fix level 434 bug
  • Fix level 906 suspended items

Stack 21

Not enough reviews yet to summarise bugs or requests.

In-app purchases

20 purchases

Hole Busters 3D

One-time20
  • CoinBundle1$1.99
  • Endless Treasure03$2.99
  • Endless Treasure10$4.99
Show 17 more
  • RemoveAds$4.99
  • BeginnerBundle$4.99
  • Merge Bundle$7.99
  • CoinBundle2$8.99
  • Merge Bundle Silver$9.99
  • Silver Treasure Bundle$9.99
  • Hole Pass$9.99
  • RemoveAds2$9.99
  • MasterBundle$9.99
  • CoinBundle3$13.99
  • MegaBundle$19.99
  • CoinBundle4$27.99
  • GiantBundle$39.99
  • CoinBundle5$54.99
  • UltraBundle$79.99
  • LegendaryBundle$99.99
  • CoinBundle6$99.99
None

Stack 21

No in-app purchases

Questions

Is Hole Busters 3D free?
Hole Busters 3D is free to download, with in-app purchases available.
Is Stack 21 free?
Stack 21 is free to download, with no in-app purchases.
Do Hole Busters 3D or Stack 21 have ads?
Hole Busters 3D shows ads; Stack 21 does not.

Other comparisons