# Pin Head - Lock Cylinder Calc — Lock Cylinder Calculator > Lock cylinder pinning calculator with picking difficulty rating and pin violation checks. (iPhone/iPad app by Farren Domenici.) - Source: https://appshunter.io/ios/app/pin-head-lock-cylinder-calc/id782925810 (this page in markdown: same URL + `.md`) - Developer: [Farren Domenici](https://appshunter.io/developer/583666476) - Category: Utilities, Productivity - Price: $3.99 - Rating: 5.00/5 from 6 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 2 MB - Languages: American English - Released: 2014-01-28 - Data updated: 2026-08-29 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/pin-head-lock-cylinder-calc/id782925810/reviews.md ## What is Pin Head? Pin Head is a simple but powerful tool to calculate the pinning of a cylinder. Calculate 2, 3, or 4 keys at a time with pin lengths of 4, 5, 6, or 7. Easy to use interface: Every text field "autotabs" so there is no need to tap on every box. All master pins are displayed just as a cylinder would be pinned. Picking calculator measures the difficulty from a range of zero (easiest) to ten (hardest) on every chart created. System selector provides the appropriate driver/top pins, checks for any MACS and pin violations by highlighting the offending cuts, grants ability to convert bittings into pin sizes for 3-thousandths and 5-thousandths pin kits, and calibrates the picking calculator. Ability to change the value of zero to equal 10 when not utilizing a system (automatically selects the appropriate value for each system). Landscape mode for a larger readout. Most popular pinning charts are readily available, providing both bottom and top pin sizes as well as key depths. 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 ## Key features - Calculate 2, 3, or 4 keys - Pin lengths of 4, 5, 6, or 7 - Auto-tabbing interface - Master pin display - Picking difficulty rating - Pin violation checks - Bitting to pin size conversion ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/pin-head-lock-cylinder-calc/id782925810/reviews.md ### 5/5 — Security pins would be awesome!! *2020-05-16* Next update, Spool and serrated pins maybe? **Developer response:** Hello! Thank you for the input and feedback. In regards to spool and serrated pins are you asking to implement them into the picking calculator? Shoot me an email at phil@locksmithapps.com to further discuss. ### 5/5 — Simple but useful *2016-10-09* Quick and easy works great! ## Frequently asked questions about Pin Head ### What is Pin Head used for? Pin Head is a utility app designed to calculate the pinning of lock cylinders. It helps users determine the correct pin lengths and configurations for various keys and cylinder types. ### What pin lengths and key configurations does Pin Head support? Pin Head supports calculating pinning for 2, 3, or 4 keys at a time, with pin lengths of 4, 5, 6, or 7. It also displays master pins as they would be in a cylinder. ### How does Pin Head rate picking difficulty? The picking calculator within Pin Head measures the difficulty of picking a cylinder on a scale from zero (easiest) to ten (hardest) for every chart it creates. ### Does Pin Head check for pin violations? Yes, the system selector in Pin Head checks for any MACS and pin violations by highlighting the offending cuts. This ensures accurate and safe cylinder configurations. ### What devices is Pin Head compatible with? Pin Head is compatible with iPhone and iPod touch devices running iOS 8.0 or later, and iPads running iOS 12.0 or later. ### How often is Pin Head updated? The latest version of Pin Head is 1.6.2, which was last updated on March 12, 2026. This indicates a history of updates, though the exact frequency is not specified. ### What is the price of Pin Head? Pin Head is a paid application, available for purchase at $3.99. There are no in-app purchases or advertisements associated with this app. ### How does Pin Head handle different pinning systems? Pin Head allows you to change the value of zero to equal 10 when not utilizing a specific system, automatically selecting the appropriate value for each system. It also provides the appropriate driver/top pins. ## Version history (last 5 releases) ### 1.6.2 — 2026-03-12 -Under the hood repairs ### 1.6.1 — 2022-03-03 ---Note: This update requires a minimum version of iOS 12.0--- -Under the hood service to maintain a healthy running app ### 1.6 — 2020-05-12 -Under the hood service to maintain a healthy running app ### 1.5 — 2019-07-23 -Added conversion of bittings into pin sizes for 3-thousandths and 5-thousandths pin kits -Systems are now checked for pin violations -Added three .552 plug corbin-russwin systems -Added landscape mode for a larger readout -Added Dark Mode -Under the hood improvements and repairs ### 1.4 — 2019-02-25 -Added MACS checker. Now after selecting a system for calculating the top pins, any cuts that violate the MACS rules will be highlighted in orange. ## Apps similar to Pin Head | App | Rating | Price | Category | | --- | --- | --- | --- | | [RConsole](https://appshunter.io/ios/app/rconsole/id6747511290) | 4.0 (1) | $0.49 | Utilities | | [Triton PLUS™](https://appshunter.io/ios/app/triton-plus/id6448079864) | 5.0 (5) | Free | Utilities | | [Meuble Sim](https://appshunter.io/ios/app/meuble-sim/id6759811181) | — | Free | Utilities | | [Entropia Companion](https://appshunter.io/ios/app/entropia-companion/id6762374029) | — | Free | Utilities | | [JMA America](https://appshunter.io/ios/app/jma-america/id1464552449) | — | Free | Utilities | | [Locksmith FieldPro](https://appshunter.io/ios/app/locksmith-fieldpro/id6759275181) | — | Free | Utilities | ## More apps by Farren Domenici - [ServiceCalc](https://appshunter.io/ios/app/servicecalc/id583666473) - [A2Calc](https://appshunter.io/ios/app/a2calc/id589583757) - [LFIC](https://appshunter.io/ios/app/lfic/id595870826) - [Master It](https://appshunter.io/ios/app/master-it/id645920825) - [Biaxial](https://appshunter.io/ios/app/biaxial/id658649763) - [Dialnostics](https://appshunter.io/ios/app/dialnostics/id662583874) All apps by Farren Domenici: https://appshunter.io/developer/583666476 ## Related topics [sledge](https://appshunter.io/ios/topics/sledge) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*