# Bolt Merge vs Stack Up Circle

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.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

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.

## The numbers

| Metric | Bolt Merge | Stack Up Circle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 6 days | **Every 5 days** |
| Size | 97 MB | 87 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FEELCRAFTERS OYUN YAZILIM LIMITED SIRKETI](https://appshunter.io/developer/1691256089) | [Rootcraft](https://appshunter.io/developer/1370994577) |

## What reviewers say

### Bolt Merge

[App page](https://appshunter.io/ios/app/bolt-merge/id6471973015)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stack Up Circle

[App page](https://appshunter.io/ios/app/stack-up-circle/id6473114736)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*