# Electronic Circuits Calc Pro vs Questar Installer

The clearest difference is price: Questar Installer at Free against Electronic Circuits Calc Pro's $4.99. Questar Installer also leads on iOS requirement (13.0 vs 17.0). Electronic Circuits Calc Pro's advantage is update cadence (every 2 months vs every 4 months). On ads, in-app purchases and device support there is nothing between them.

Questar Installer 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.

Electronic Circuits Calc Pro ships an update every 2 months, Questar Installer every 4 months. The most recent releases landed on October 27, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Electronic Circuits Calc Pro | Questar Installer |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Size | 19 MB | 3 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [ALG Software Lab](https://appshunter.io/developer/1650561236) | [QUESTAR AUTO TECHNOLOGIES LTD](https://appshunter.io/developer/916723518) |

## What reviewers say

### Electronic Circuits Calc Pro

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

**Features:** Vision Pro support

**In-app purchases:** none


### Questar Installer

[App page](https://appshunter.io/ios/app/questar-installer/id6751549009)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Electronic Circuits Calc Pro free?

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

### Is Questar Installer free?

Questar Installer is free to download, with no in-app purchases.

### Do Electronic Circuits Calc Pro or Questar Installer have ads?

Neither Electronic Circuits Calc Pro nor Questar Installer shows ads.

### Which is updated more often, Electronic Circuits Calc Pro or Questar Installer?

Electronic Circuits Calc Pro ships an update every 2 months, and Questar Installer every 4 months. Most recently, Electronic Circuits Calc Pro was updated on October 27, 2026 and Questar Installer on October 7, 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.*