# Instrument Scaling Calculator vs Electrical Tools & Reference

The clearest difference is rating: Electrical Tools & Reference at 4.6 against Instrument Scaling Calculator's 1.0. Electrical Tools & Reference also leads on ratings volume (31 vs 1). Instrument Scaling Calculator's advantage is in-app purchases (none vs 2). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Electrical Tools & Reference sells 2 in-app purchases, starting at $2.99 per month. Instrument Scaling Calculator asks for nothing beyond the download.

Electrical Tools & Reference holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Electrical Tools & Reference has 31 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | Instrument Scaling Calculator | Electrical Tools & Reference |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/instrument-scaling-calculator/id6657973568/reviews) | **[4.6 (31 ratings)](https://appshunter.io/ios/app/electrical-tools-and-reference/id6746714702/reviews)** |
| Number of ratings | 1 | **31** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 19 MB | 88 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Added Value Instrumentation Services Pty Ltd](https://appshunter.io/developer/1764449986) | [Ashvin Kevadiya](https://appshunter.io/developer/1756324971) |

## What reviewers say

### Instrument Scaling Calculator

[App page](https://appshunter.io/ios/app/instrument-scaling-calculator/id6657973568)

This tool simplifies instrumentation setup and scaling needs. It performs accurate conversions between process variables, 4-20mA signals, and percentages with an intuitive interface for quick calculations.

**Highlights:** Converts between 4-20mA, process variables, and percentages, User-friendly interface, Provides instant calculation results, Streamlines instrumentation setup, Supports professionals in control systems

**Features:** macOS Compatibility

**In-app purchases:** none


### Electrical Tools & Reference

[App page](https://appshunter.io/ios/app/electrical-tools-and-reference/id6746714702)

Master electrical concepts, circuits, and wiring with this comprehensive app. It offers detailed diagrams, essential tools, and clear explanations for students, apprentices, and professionals. Learn theory, practice with quizzes, and access a symbol library for real-world electrical work.

**Highlights:** Electrical theory basics, Interactive wiring diagrams, Built-in electrical calculators, Schematic symbols library, Quizzes and electrical tests, Real-world explanations

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Lifetime Premium | $3.99 | one-time |


## Frequently asked questions

### Is Instrument Scaling Calculator free?

Instrument Scaling Calculator is free to download, with no in-app purchases.

### Is Electrical Tools & Reference free?

Electrical Tools & Reference is free to download, with in-app purchases available.

### Which has better reviews, Instrument Scaling Calculator or Electrical Tools & Reference?

Electrical Tools & Reference is rated higher. Instrument Scaling Calculator averages 1.0 out of 5 from 1 ratings, while Electrical Tools & Reference averages 4.6 from 31 ratings.

### Do Instrument Scaling Calculator or Electrical Tools & Reference have ads?

Neither Instrument Scaling Calculator nor Electrical Tools & Reference 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.*