# PP+ Joule Heating vs Measure Volume with Precision

The clearest difference is price: Measure Volume with Precision at Free against PP+ Joule Heating's $1.99. Measure Volume with Precision also leads on device support (3 vs 1) and iOS requirement (12.0 vs 18.0). On ads and in-app purchases there is nothing between them.

Measure Volume with Precision is free to download; PP+ Joule Heating costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | PP+ Joule Heating | Measure Volume with Precision |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 31 months | — |
| Size | 125 MB | 26 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Polyhedron Learning Media, Inc.](https://appshunter.io/developer/458882328) | [Science Education Institute](https://appshunter.io/developer/1439710468) |

## What reviewers say

### PP+ Joule Heating

[App page](https://appshunter.io/ios/app/pp-plus-joule-heating/id804719524)

**Features:** macOS Compatibility

**In-app purchases:** none


### Measure Volume with Precision

[App page](https://appshunter.io/ios/app/measure-volume-with-precision/id6504663199)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PP+ Joule Heating free?

PP+ Joule Heating costs $1.99, with no in-app purchases.

### Is Measure Volume with Precision free?

Measure Volume with Precision is free to download, with no in-app purchases.

### Do PP+ Joule Heating or Measure Volume with Precision have ads?

Neither PP+ Joule Heating nor Measure Volume with Precision 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.*