# A4Calc

> SFIC Calculator

Canonical page: [https://chrome-stats.com/d/id734140182](https://chrome-stats.com/d/id734140182)

## Overview

- **ID:** `id734140182`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Farren Domenici
- **Category:** Utilities
- **Version:** 1.2.3
- **Last updated:** 2026-03-11
- **First published:** 2013-11-12
- **Size:** 1.80 MB
- **Data as of:** 2026-09-22
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/a4calc/id734140182)
- **Website:** [http://www.locksmithapps.com](http://www.locksmithapps.com/)
- **Privacy policy:** [http://www.locksmithapps.com/info.html#priv](http://www.locksmithapps.com/info.html#priv)

## Description

A4 Small Format Interchangeable Core Calculator
(sister app of A2Calc and A3Calc)

---Programmed by a Locksmith, for Locksmiths---
Automatically calculates the pinning chart for A4 SFIC. Built for 6 or 7 pin systems, however, less can be achieved by using a decimal to erase a chamber.

Minimum of a control and master key are required to make a chart. Additional change key available for all devices; 2 change keys available for 16:9 screen devices.

Randomize function will generate completely random charts each time it is triggered.

"Lock/Unlock" toggle disables/enables all inputs and functions to prevent unwanted/lost changes.

Control Finder is an added bonus by reverse engineering a core to determine the control key's bitting. This is perfect when needing to remove multiple cores in a building when the control key has been lost. There are two methods for achieving the control key: 1. using the master, control, and bottom pins, or 2. using only the top/driver pins.

Up to 16 different projects can be saved at any one given time.

All projects are encrypted and protected with a passcode when stored on your device.

All projects can be exported via AirPrint and Email.

Compatibility: iPhone / iPod touch on iOS 8.0 or later and iPad on iOS 12.0 or later.

Found a bug? Something not working? Have a suggestion? Feel free to contact me via email: farren@phoxlocks.com

## Rankings

- #1,064,576 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id734140182)