# Electrical Calculator ElecCalc vs Duct Sizer Calc HVAC

The clearest difference is price: Electrical Calculator ElecCalc at Free against Duct Sizer Calc HVAC's $0.99. Duct Sizer Calc HVAC's advantage is chart position (#184 vs unranked) and iOS requirement (13.0 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Electrical Calculator ElecCalc is free to download; Duct Sizer Calc HVAC costs $0.99 up front. Electrical Calculator ElecCalc sells 2 in-app purchases, starting at $2.99 per month and Duct Sizer Calc HVAC sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Electrical Calculator ElecCalc ships an update monthly, Duct Sizer Calc HVAC every 3 weeks. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Electrical Calculator ElecCalc | Duct Sizer Calc HVAC |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Best chart rank | — | **#184** |
| Size | 2 MB | 34 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Osman Seven](https://appshunter.io/developer/1875631963) | [Rizvan Adzhoian](https://appshunter.io/developer/1891746079) |

## What reviewers say

### Electrical Calculator ElecCalc

[App page](https://appshunter.io/ios/app/electrical-calculator-eleccalc/id6758902534)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ElecCalc Pro Monthly | $2.99 | per month |
| ElecCalc Pro Yearly | $19.99 | per year |


### Duct Sizer Calc HVAC

[App page](https://appshunter.io/ios/app/duct-sizer-calc-hvac/id6764646921)

**Currently charting:** #184 Top Paid · Utilities (US App Store)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Unlock | $2.99 | one-time |


## Frequently asked questions

### Is Electrical Calculator ElecCalc free?

Electrical Calculator ElecCalc is free to download, with in-app purchases available.

### Is Duct Sizer Calc HVAC free?

Duct Sizer Calc HVAC costs $0.99, and also offers in-app purchases.

### Do Electrical Calculator ElecCalc or Duct Sizer Calc HVAC have ads?

Neither Electrical Calculator ElecCalc nor Duct Sizer Calc HVAC shows ads.

### Which is updated more often, Electrical Calculator ElecCalc or Duct Sizer Calc HVAC?

Electrical Calculator ElecCalc ships an update monthly, and Duct Sizer Calc HVAC every 3 weeks. Most recently, Electrical Calculator ElecCalc was updated on October 31, 2026 and Duct Sizer Calc HVAC on October 28, 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.*