# ZonergyPro vs ElectroCalc Pro

The clearest difference is in-app purchases: ZonergyPro at none against ElectroCalc Pro's 1. ZonergyPro also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 3 months). On price and device support there is nothing between them.

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

ZonergyPro ships an update every 3 weeks, ElectroCalc Pro every 3 months. The most recent releases landed on November 3, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | ZonergyPro | ElectroCalc Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 55 MB | 27 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DELTA NETWORKS (XIAMEN) LTD](https://appshunter.io/developer/1033104954) | [DONGSOO LEE](https://appshunter.io/developer/1868670088) |

## What reviewers say

### ZonergyPro

[App page](https://appshunter.io/ios/app/zonergypro/id1638251713)

**Features:** macOS Compatibility

**In-app purchases:** none


### ElectroCalc Pro

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

**Features:** macOS Compatibility, iPhone Duo support

**In-app purchases (1)**

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


## Frequently asked questions

### Is ZonergyPro free?

ZonergyPro 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 ZonergyPro or ElectroCalc Pro have ads?

ElectroCalc Pro shows ads; ZonergyPro does not.

### Which is updated more often, ZonergyPro or ElectroCalc Pro?

ZonergyPro ships an update every 3 weeks, and ElectroCalc Pro every 3 months. Most recently, ZonergyPro was updated on November 3, 2026 and ElectroCalc Pro on November 2, 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.*