# Physics Toolkit Pro vs Reliability of systems

The clearest difference is price: Reliability of systems at Free against Physics Toolkit Pro's $1.99. Physics Toolkit Pro's advantage is in-app purchases (none vs 1) and iOS requirement (11.2 vs 13.0). On ads and device support there is nothing between them.

Reliability of systems is free to download; Physics Toolkit Pro costs $1.99 up front. Reliability of systems sells 1 one-off in-app purchase. Physics Toolkit Pro asks for nothing beyond the download.

## The numbers

| Metric | Physics Toolkit Pro | Reliability of systems |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/physics-toolkit-pro/id1353781414/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 18 months |
| Monetization | Paid | — |
| Size | 15 MB | 4 MB |
| Requires iOS | **11.2** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Electronial](https://appshunter.io/developer/1350247180) | [Siu Yuen Ho](https://appshunter.io/developer/814088527) |

## What reviewers say

### Physics Toolkit Pro

[App page](https://appshunter.io/ios/app/physics-toolkit-pro/id1353781414)

This app provides a comprehensive suite of physics calculators, tables, and formulas for students and professionals. It covers a wide range of physics concepts, from basic mechanics to electromagnetism and quantum physics, offering quick access to essential information.

**Highlights:** Extensive physics calculators, Comprehensive formula library, Element and periodic table data, Unit and constant reference, Supports students and professionals

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

**In-app purchases:** none


### Reliability of systems

[App page](https://appshunter.io/ios/app/reliability-of-systems/id6443837301)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro feature | $1.99 | one-time |


## Frequently asked questions

### Is Physics Toolkit Pro free?

Physics Toolkit Pro costs $1.99, with no in-app purchases.

### Is Reliability of systems free?

Reliability of systems is free to download, with in-app purchases available.

### Do Physics Toolkit Pro or Reliability of systems have ads?

Neither Physics Toolkit Pro nor Reliability of systems 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.*