# A2Calc vs Door Pilot 2

The clearest difference is price: Door Pilot 2 at Free against A2Calc's $6.99. A2Calc's advantage is chart position (#180 vs unranked) and iOS requirement (12.0 vs 16.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Door Pilot 2 is free to download; A2Calc costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

A2Calc ships an update every 3 months, Door Pilot 2 every 2 months. The most recent releases landed on September 30, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | A2Calc | Door Pilot 2 |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | **[4.7 (10 ratings)](https://appshunter.io/ios/app/a2calc/id589583757/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 93.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Paid | — |
| Best chart rank | **#180** | — |
| Size | 2 MB | 21 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Farren Domenici](https://appshunter.io/developer/583666476) | [dormakaba International Holding GmbH](https://appshunter.io/developer/1370142205) |

## What reviewers say

### A2Calc

[App page](https://appshunter.io/ios/app/a2calc/id589583757)

**Currently charting:** #180 Top Paid · Utilities (US App Store)

This app assists locksmiths by automatically calculating pinning charts for A2 SFIC systems. It supports 6 or 7 pin systems and includes features like a randomize function, control finder, and project saving. Projects are encrypted and can be shared via AirPrint or email.

**Highlights:** Automatic pinning chart calculation, Supports 6 or 7 pin systems, Randomize chart generation, Control Finder for lost control keys, Save up to 16 projects, Encrypted and passcode-protected projects, Share projects via AirPrint or email

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

**In-app purchases:** none


### Door Pilot 2

[App page](https://appshunter.io/ios/app/door-pilot-2/id6476268387)

**In-app purchases:** none


## Frequently asked questions

### Is A2Calc free?

A2Calc costs $6.99, with no in-app purchases.

### Is Door Pilot 2 free?

Door Pilot 2 is free to download, with no in-app purchases.

### Do A2Calc or Door Pilot 2 have ads?

Neither A2Calc nor Door Pilot 2 shows ads.

### Which is updated more often, A2Calc or Door Pilot 2?

A2Calc ships an update every 3 months, and Door Pilot 2 every 2 months. Most recently, A2Calc was updated on September 30, 2026 and Door Pilot 2 on October 10, 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.*