Comparison

Bolt Merge vs Stack Up Circle

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

Head to head

Match and Stack

About

Bolt Merge

Features

Read full description

In this riveting game, players strategically place bolts with varying numbers from their team toolbox into corresponding slots on wheels, piecing together the wheels of diverse cars. Upgrade bolts by combining three, but beware of the limited assembly space. Complete all wheels to advance levels, but be precise – a misstep and you lose. Get ready for a challenging, bolt-assembling adventure that accelerates your skills and thrills!

About

Stack Up Circle

Features

Read full description

Throw the stack in the middle onto the circle and try to match the same colored ones! Get to the goal faster with one-shot combo matches.

Screenshots

Bolt Merge4 screens

Stack Up Circle4 screens

Verdict

The call

Bolt Merge and Stack Up Circle are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Bolt Merge ships an update every 6 days, Stack Up Circle every 5 days. The most recent releases landed on September 22, 2026 and September 13, 2026 respectively.

ScorecardNo meaningful differences

Bolt Merge versus Stack Up Circle: the parameters behind the verdict, then further details
Parameter	Bolt Merge	Stack Up Circle
Price	Free	Free
Update frequency	Every 6 days	Every 5 days — better
Ads	Yes	Yes
In-app purchases	No	No
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	12.0	11.0 — better
Further details — not scored
Size	97 MB	87 MB
Age rating	4+	4+
Developer	FEELCRAFTERS OYUN YAZILIM LIMITED SIRKETI	Rootcraft

In-app purchases

None

Bolt Merge

No in-app purchases

None

Stack Up Circle

No in-app purchases

Questions

Is Bolt Merge free?

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

Is Stack Up Circle free?

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

Do Bolt Merge or Stack Up Circle have ads?

Both Bolt Merge and Stack Up Circle show ads.

Which is updated more often, Bolt Merge or Stack Up Circle?

Bolt Merge ships an update every 6 days, and Stack Up Circle every 5 days. Most recently, Bolt Merge was updated on September 22, 2026 and Stack Up Circle on September 13, 2026.