# VOOL vs RigCalc

The clearest difference is price: VOOL at Free against RigCalc's $1.99. RigCalc's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.6). On ads and in-app purchases there is nothing between them.

VOOL is free to download; RigCalc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | VOOL | RigCalc |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 125 MB | 26 MB |
| Requires iOS | 17.6 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MultiCharge OU](https://appshunter.io/developer/1625724556) | [COVENTIFY (PRIVATE) LIMITED](https://appshunter.io/developer/1833652665) |

## What reviewers say

### VOOL

[App page](https://appshunter.io/ios/app/vool-smart-ev-charging/id1669222009)

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

**In-app purchases:** none


### RigCalc

[App page](https://appshunter.io/ios/app/rigcalc-drilling-calculator/id6809601879)

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

**In-app purchases:** none


## Frequently asked questions

### Is VOOL free?

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

### Is RigCalc free?

RigCalc costs $1.99, with no in-app purchases.

### Do VOOL or RigCalc have ads?

Neither VOOL nor RigCalc shows ads.

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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.*