LFIC Calculator

Farren Domenici

Designed for iPhone

    • 3.7 • 3 Ratings
    • $5.99

iPhone Screenshots


LFIC: Large Format Interchangeable Core Calculator

Automatically calculates the pinning charts for Corbin-Russwin (System 70 & Non-System 70), Sargent (Standard and Degree), Medeco 32 Series, and Assa (Sargent & Yale / Corbin-Russwin).

Obeys required rules set by Corbin-Russwin, Sargent, Medeco, and Assa respectively.

Randomize function will generate completely random charts each time it is triggered while obeying any applicable MACS rules.

Easy to use interface: Every text field "autotabs" so there is no need to tap on every box.

Freeze inputs and functions by tapping the Lock/Unlock toggle to prevent unwanted changes.

MACS chart provided in information page for Medeco.

AirPrint or Email systems.

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: phil@locksmithapps.com

What’s New

Version 1.6.1

---Note: This update requires a minimum version of iOS 12.0---

-Under the hood service to maintain a healthy running app

Ratings and Reviews

3.7 out of 5
3 Ratings

3 Ratings

Phoenix,AZ ,

A "must have" for Facility Locksmiths!

Phillip D., you keep making incredibly useful apps in for the locksmith community. If you have a Sargent or Corbin large format system then you must get this. I encourage everyone I train on buying this app.

Developer Response ,

So glad you like! Thank you for your kind words!

Neomikin ,

Does not work in all situations

Does not work if your master key cuts are deeper than your control key cuts, returns negative pin numbers

Developer Response ,

If you're referring to Corbin Russwin (both sys70 and non-sys70) you will indeed return negative pin numbers any time the control bitting is less than a master or change bitting. This is how the these systems were designed. If you would like more information or need any help feel free to contact me.

App Privacy

The developer, Farren Domenici, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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