# ProEye ACS vs ElectroCalc Pro

The clearest difference is in-app purchases: ProEye ACS at none against ElectroCalc Pro's 1. ProEye ACS also leads on ads (none vs shown) and update cadence (fortnightly vs every 2 months). ElectroCalc Pro's advantage is iOS requirement (13.0 vs 15.6). On price and device support there is nothing between them.

Both are free to download. ElectroCalc Pro sells 1 one-off in-app purchase. ProEye ACS asks for nothing beyond the download.

ProEye ACS ships an update fortnightly, ElectroCalc Pro every 2 months. The most recent releases landed on October 21, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | ProEye ACS | ElectroCalc Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 13 MB | 28 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AirNet](https://appshunter.io/developer/1321825811) | [DONGSOO LEE](https://appshunter.io/developer/1868670088) |

## What reviewers say

### ProEye ACS

[App page](https://appshunter.io/ios/app/proeye-acs/id1585793586)

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

**In-app purchases:** none


### ElectroCalc Pro

[App page](https://appshunter.io/ios/app/electrocalc-pro/id6758211193)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is ProEye ACS free?

ProEye ACS is free to download, with no in-app purchases.

### Is ElectroCalc Pro free?

ElectroCalc Pro is free to download, with in-app purchases available.

### Do ProEye ACS or ElectroCalc Pro have ads?

ElectroCalc Pro shows ads; ProEye ACS does not.

### Which is updated more often, ProEye ACS or ElectroCalc Pro?

ProEye ACS ships an update fortnightly, and ElectroCalc Pro every 2 months. Most recently, ProEye ACS was updated on October 21, 2026 and ElectroCalc Pro on October 8, 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.*