# Electronic Formulator vs Metal Calculator A1 Pro

The clearest difference is update cadence: Electronic Formulator at every 9 days against Metal Calculator A1 Pro's every 6 months. Metal Calculator A1 Pro's advantage is iOS requirement (15.0 vs 26.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Electronic Formulator sells 1 one-off in-app purchase and Metal Calculator A1 Pro sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Electronic Formulator ships an update every 9 days, Metal Calculator A1 Pro every 6 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Electronic Formulator | Metal Calculator A1 Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (5 ratings)](https://appshunter.io/ios/app/metal-calculator-a1-pro/id1589637862/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 6 months |
| Monetization | — | Free |
| Size | 19 MB | 94 MB |
| Requires iOS | 26.2 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Binary And Bricks Pvt Ltd](https://appshunter.io/developer/1587170688) |

## What reviewers say

### Electronic Formulator

[App page](https://appshunter.io/ios/app/electronic-formulator/id675036997)

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

**In-app purchases (1)**

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


### Metal Calculator A1 Pro

[App page](https://appshunter.io/ios/app/metal-calculator-a1-pro/id1589637862)

This app simplifies metal quantity calculations for various projects. It offers tools for calculating quantities, shapes, joints, and performing material tests. Supports both Imperial and Metric systems, with a wide range of metal types and converters.

**Highlights:** Quantity calculations for pipes, bars, sheets, and beams, Shape customization for metal bars, Detailed joint calculations (welded, bolted, riveted), Material testing (fatigue, bend, hardness, impact, tensile), Unit converters (length, volume, density), Support for various metal types and materials, Detailed reporting and user-friendly interface

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Metal Monthly Subscription | $1.99 | per month |
| Metal Yearly Subscription | $12.99 | per year |
| Pro Version | $12.99 | one-time |
| Pro version | $12.99 | one-time |


## Frequently asked questions

### Is Electronic Formulator free?

Electronic Formulator is free to download, with in-app purchases available.

### Is Metal Calculator A1 Pro free?

Metal Calculator A1 Pro is free to download, with in-app purchases available.

### Do Electronic Formulator or Metal Calculator A1 Pro have ads?

Neither Electronic Formulator nor Metal Calculator A1 Pro shows ads.

### Which is updated more often, Electronic Formulator or Metal Calculator A1 Pro?

Electronic Formulator ships an update every 9 days, and Metal Calculator A1 Pro every 6 months. Most recently, Electronic Formulator was updated on October 29, 2026 and Metal Calculator A1 Pro on October 25, 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.*