# A3Calc vs Locksmith FieldPro

The clearest difference is price: Locksmith FieldPro at Free against A3Calc's $1.99. A3Calc's advantage is iOS requirement (12.0 vs 15.1). On ads, in-app purchases and device support there is nothing between them.

Locksmith FieldPro is free to download; A3Calc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | A3Calc | Locksmith FieldPro |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | — |
| Size | 2 MB | 44 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Farren Domenici](https://appshunter.io/developer/583666476) | [Kyle Barnard](https://appshunter.io/developer/1877820702) |

## What reviewers say

### A3Calc

[App page](https://appshunter.io/ios/app/a3calc/id1340952531)

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

**In-app purchases:** none


### Locksmith FieldPro

[App page](https://appshunter.io/ios/app/locksmith-fieldpro/id6759275181)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is A3Calc free?

A3Calc costs $1.99, with no in-app purchases.

### Is Locksmith FieldPro free?

Locksmith FieldPro is free to download, with no in-app purchases.

### Do A3Calc or Locksmith FieldPro have ads?

Neither A3Calc nor Locksmith FieldPro shows ads.

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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.*