Comparison

Stack Merge vs Keep Sorting

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

Head to head

Stack Merge

Number Stacking Challenge

★ 4.812 ratingsView app →

About

Stack Merge

Features

Read full description

Stack Merge is a fast-paced puzzle game where players stack and merge numbered tiles. Combine tiles of the same number to create higher numbers and clear the board. The game ends when there are no more moves left. Aim for the highest score!

About

Keep Sorting

A casual puzzle game where players slide and release to throw stacks of colored disks. Match disks of the same color to sort them and collect them by matching ten or more. Enjoy a simple yet engaging sorting experience.

Highlights

Slide and release controls
Match same-colored disks
Collect disks by matching 10+
Simple gameplay mechanics
Engaging puzzle challenges

Features

Read full description

How to Play: - Slide left and right to change the aim. - Release the finger to throw stack. - Match the same color disks to sort them. - Match 10 or more to collect them.

Screenshots

Stack Merge4 screens

Keep Sorting4 screens

Verdict

The call

The clearest difference is update cadence: Stack Merge at every 2 weeks against Keep Sorting's every 6 months. Keep Sorting's advantage is iOS requirement (11.0 vs 13.0). On price, ads, 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Stack Merge ships an update every 2 weeks, Keep Sorting every 6 months. The most recent releases landed on September 24, 2026 and October 5, 2026 respectively.

Scorecard2 real differences · 7 level

Stack Merge versus Keep Sorting: the parameters behind the verdict, then further details
Parameter	Stack Merge	Keep Sorting
Price	Free	Free
Rating	—	4.8 (12 ratings) — better
Number of ratings	—	12 — better
Update frequency	Every 2 weeks — better	Every 6 months
Ads	Yes	Yes
In-app purchases	No	No
Monetization	—	Ad-supported
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	13.0	11.0 — better
Further details — not scored
Size	103 MB	102 MB
Age rating	4+	12+
Developer	Rasel Hossain	Rocketship Studios LLP

In-app purchases

None

Stack Merge

No in-app purchases

None

Keep Sorting

No in-app purchases

Questions

Is Stack Merge free?

Stack Merge is free to download, with no in-app purchases.

Is Keep Sorting free?

Keep Sorting is free to download, with no in-app purchases.

Do Stack Merge or Keep Sorting have ads?

Both Stack Merge and Keep Sorting show ads.

Which is updated more often, Stack Merge or Keep Sorting?

Stack Merge ships an update every 2 weeks, and Keep Sorting every 6 months. Most recently, Stack Merge was updated on September 24, 2026 and Keep Sorting on October 5, 2026.