# VoltLab vs Virtual Hydraulic Test Rigs

The clearest difference is iOS requirement: Virtual Hydraulic Test Rigs at 13.2 against VoltLab's 15.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. VoltLab sells 7 in-app purchases, starting at $3.99 per month and Virtual Hydraulic Test Rigs sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | VoltLab | Virtual Hydraulic Test Rigs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (381 ratings)](https://appshunter.io/ios/app/voltlab-interactive-physics/id1461701360/reviews)** | — |
| Number of ratings | **381** | — |
| Positive reviews | 96.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 125 MB | 11 MB |
| Requires iOS | 15.0 | **13.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Denis Gladkii](https://appshunter.io/developer/1851726380) | [Gary Molton](https://appshunter.io/developer/1193080103) |

## What reviewers say

### VoltLab

[App page](https://appshunter.io/ios/app/voltlab-interactive-physics/id1461701360)

This app simplifies learning electricity through interactive lessons and visual experiments. It offers offline access, quizzes with detailed solutions, and a reference guide for formulas. Ideal for students and educators seeking to understand electrical concepts.

**Highlights:** Interactive circuit building, Visual experiment results, Self-paced learning, Quizzes with step-by-step solutions, Offline access to lessons, Reference guide for formulas

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VoltLab Pro One Month | $3.99 | per month |
| VoltLab Pro One Year | $12.99 | per year |
| VoltLab Pro One Year | $6.99 | one-time |
| VoltLab Donat | $10.99 | one-time |
| VoltLab Pro | $39.99 | one-time |
| VoltLab Donate | $49.99 | one-time |
| Awesome VoltLab Donat | $99.99 | one-time |


### Virtual Hydraulic Test Rigs

[App page](https://appshunter.io/ios/app/virtual-hydraulic-test-rigs/id1523830315)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access all virtual test rigs | $7.99 | one-time |


## Frequently asked questions

### Is VoltLab free?

VoltLab is free to download, with in-app purchases available.

### Is Virtual Hydraulic Test Rigs free?

Virtual Hydraulic Test Rigs is free to download, with in-app purchases available.

### Do VoltLab or Virtual Hydraulic Test Rigs have ads?

Neither VoltLab nor Virtual Hydraulic Test Rigs 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.*