# Roll Period vs SIGMA REAL

The clearest difference is device support: Roll Period at 2 against SIGMA REAL's —. SIGMA REAL's advantage is iOS requirement (11.0 vs 15.0). On price and in-app purchases there is nothing between them.

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

## The numbers

| Metric | Roll Period | SIGMA REAL |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 13 months | — |
| Size | 27 MB | 22 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 12+ |
| Developer | [Rob Grin](https://appshunter.io/developer/1835670007) | [ID&A S.r.l.](https://appshunter.io/developer/1446283055) |

## What reviewers say

### Roll Period

[App page](https://appshunter.io/ios/app/roll-period/id6751540867)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### SIGMA REAL

[App page](https://appshunter.io/ios/app/sigma-real/id6758456062)

**In-app purchases:** none


## Frequently asked questions

### Is Roll Period free?

Roll Period is free to download, with no in-app purchases.

### Is SIGMA REAL free?

SIGMA REAL is free to download, with no in-app purchases.

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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.*