# Percent Error Calculator vs Electronic Circuits Calc Pro

The clearest difference is price: Percent Error Calculator at Free against Electronic Circuits Calc Pro's $4.99. Percent Error Calculator also leads on update cadence (weekly vs every 2 months) and iOS requirement (13.0 vs 17.0). Electronic Circuits Calc Pro's advantage is chart position (#200 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Percent Error Calculator is free to download; Electronic Circuits Calc Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Percent Error Calculator ships an update weekly, Electronic Circuits Calc Pro every 2 months. The most recent releases landed on October 3, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Percent Error Calculator | Electronic Circuits Calc Pro |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Best chart rank | — | **#200** |
| Size | 40 MB | 19 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Stage Coding](https://appshunter.io/developer/1637068135) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### Percent Error Calculator

[App page](https://appshunter.io/ios/app/percent-error-calculator/id1619680411)

**Features:** macOS Compatibility

**In-app purchases:** none


### Electronic Circuits Calc Pro

[App page](https://appshunter.io/ios/app/electronic-circuits-calc-pro/id1658493129)

**Currently charting:** #200 Top Paid · Utilities (US App Store)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Percent Error Calculator free?

Percent Error Calculator is free to download, with no in-app purchases.

### Is Electronic Circuits Calc Pro free?

Electronic Circuits Calc Pro costs $4.99, with no in-app purchases.

### Do Percent Error Calculator or Electronic Circuits Calc Pro have ads?

Neither Percent Error Calculator nor Electronic Circuits Calc Pro shows ads.

### Which is updated more often, Percent Error Calculator or Electronic Circuits Calc Pro?

Percent Error Calculator ships an update weekly, and Electronic Circuits Calc Pro every 2 months. Most recently, Percent Error Calculator was updated on October 3, 2026 and Electronic Circuits Calc Pro on October 19, 2026.

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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.*