Comparison

Planet Merge vs Stack by Stack!

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

Head to head
About

Planet Merge

Engage in a cosmic merge puzzle inspired by viral drop-and-merge games. Launch celestial bodies into a black hole's gravity field, merging them into larger worlds. Master strategic drops to create the biggest galaxy.

Highlights
  • 360-degree orbit gameplay
  • Unlock new ships
  • Strategic merges
  • Relaxing cosmic visuals
  • Merge-drop puzzle mechanics
Features
Read full description

Discover the most cosmic merge puzzle of 2025. Inspired by Watermelon games like Suika, Planet Merge - Space Puzzle takes the viral drop-and-merge genre into deep space. Launch planets from a rotating spaceship into the gravity field of a black hole. When matching celestial bodies collide, they combine into larger, more powerful worlds. It’s simple to play but hard to master. Drop too fast or too far and your galaxy might collapse into chaos. What makes it special • 360 degree orbit gameplay. Launch planets from any angle around the black hole • Unlock new ships. Collect unique spacecraft with their own visual styles • Strategic merges. Plan your drops to trigger massive chain reactions • Relaxing cosmic visuals. Colorful planets with expressive faces and satisfying effects If you enjoy merge-drop puzzle games, Planet Merge adds a fresh gravitational twist that’s both relaxing and challenging. Can you build the biggest galaxy in the universe?

About

Stack by Stack!

Features
Read full description

Stack by Stack is a clean, satisfying block puzzle where you place three pieces at a time and clear lines with rhythm. Plan ahead, build combos, and keep the board alive as the pace ramps up. Two ways to play: - Endless Mode: chase your best score with smart placement and big clears - Daily Puzzle: a fresh puzzle to solve each day Track your progress with score, lines cleared, combo streaks, and local stats.

Screenshots

Planet Merge4 screens
Stack by Stack!4 screens

Verdict

The call

The clearest difference is in-app purchases: Stack by Stack! at none against Planet Merge's 1. Stack by Stack! also leads on update cadence (every 4 days vs every 6 weeks). Planet Merge's advantage is iOS requirement (13.0 vs 15.1). On price, ads 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. Planet Merge sells 1 one-off in-app purchase. Stack by Stack! asks for nothing beyond the download.

UpkeepUpdate frequency

Planet Merge ships an update every 6 weeks, Stack by Stack! every 4 days. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

Scorecard3 real differences · 6 level
Planet Merge versus Stack by Stack!: the parameters behind the verdict, then further details
ParameterPlanet MergeStack by Stack!
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 6 weeksEvery 4 days — better
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size375 MB94 MB
Age rating4+4+
DeveloperGodspear GamesByeongUk Choi

In-app purchases

1 purchases

Planet Merge

One-time1
  • Remove banner ads$2.99
None

Stack by Stack!

No in-app purchases

Questions

Is Planet Merge free?
Planet Merge is free to download, with in-app purchases available.
Is Stack by Stack! free?
Stack by Stack! is free to download, with no in-app purchases.
Do Planet Merge or Stack by Stack! have ads?
Both Planet Merge and Stack by Stack! show ads.
Which is updated more often, Planet Merge or Stack by Stack!?
Planet Merge ships an update every 6 weeks, and Stack by Stack! every 4 days. Most recently, Planet Merge was updated on October 30, 2026 and Stack by Stack! on November 9, 2026.

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