# Electrical Calculation Tools vs Scientific Calculator 991EX

The clearest difference is price: Scientific Calculator 991EX at Free against Electrical Calculation Tools's $1.99. Electrical Calculation Tools's advantage is in-app purchases (none vs 1) and iOS requirement (13.0 vs 17.0). On ads and device support there is nothing between them.

Scientific Calculator 991EX is free to download; Electrical Calculation Tools costs $1.99 up front. Scientific Calculator 991EX sells 1 one-off in-app purchase. Electrical Calculation Tools asks for nothing beyond the download.

## The numbers

| Metric | Electrical Calculation Tools | Scientific Calculator 991EX |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Size | 37 MB | 10 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) | [Murad Yaghi](https://appshunter.io/developer/1740110475) |

## What reviewers say

### Electrical Calculation Tools

[App page](https://appshunter.io/ios/app/electrical-calculation-tools/id6446797237)

**Features:** macOS Compatibility

**In-app purchases:** none


### Scientific Calculator 991EX

[App page](https://appshunter.io/ios/app/scientific-calculator-991ex/id6801710317)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $14.99 | one-time |


## Frequently asked questions

### Is Electrical Calculation Tools free?

Electrical Calculation Tools costs $1.99, with no in-app purchases.

### Is Scientific Calculator 991EX free?

Scientific Calculator 991EX is free to download, with in-app purchases available.

### Do Electrical Calculation Tools or Scientific Calculator 991EX have ads?

Neither Electrical Calculation Tools nor Scientific Calculator 991EX 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.*