# Proximity - Access Card Calc — Access Card Calculator > Access card and fob calculator for binary and hexadecimal conversion. (iPhone/iPad app by Farren Domenici.) - Source: https://appshunter.io/ios/app/proximity-access-card-calc/id774601885 (this page in markdown: same URL + `.md`) - Developer: [Farren Domenici](https://appshunter.io/developer/583666476) - Category: Utilities, Productivity - Price: $1.99 - Rating: 5.00/5 from 1 App Store ratings · 4 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 1 MB - Languages: American English - Released: 2013-12-11 - Data updated: 2026-08-25 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/proximity-access-card-calc/id774601885/reviews.md ## What is Proximity? Have a "naked" access card or fob and need to determine its appropriate number and facility code? If you're able to extract the binary or hexadecimal value then Proximity will do the rest. The first calculator of Proximity works one of two ways: By inputting the raw binary value of the card or by inputting the hex equivalent. To use the binary input, simply tap on the box and type in the binary value. The counter in the lower-right corner of the box will keep track of the amount of digits currently displayed. To use the hex input, tap on the box and enter the hex value. Once complete, select the bit length from the wheel below. This is only necessary when calculating from a hex value. After tapping on calculate, the output will be displayed. If there is more than one system in the same bit length, tap on Next to cycle through the different formats. The second calculator is simply the reverse of the first: 
Input the facility code, card number, select the format, and tap calculate to generate the raw binary value. More formats will be released in future versions so long as the information is acquired. If there's a format not on this app and you have the breakdown information, send it to me and I'll fulfill the request. Currently supports the following formats: 26 bits HID® Standard (H10301) 26 bits Indala 31 bits HID® ADT 33 bits HID® Standard (D10202) 34 bits HID® Standard (H10306) 34 bits HID® Northern (N1002) 34 bits Indala Optus 35 bits HID® Corporate 1000® 36 bits Simplex 36 bits Lenel 36 bits S2 37 bits HID® Farpointe (H10304) 37 bits HID® (no Facility Code) (H10302) 37 bits HID® PointGuard 37 bits Software House 40 bits Casi Rusco 40 bits XceedID 40 bits Honeywell (P10001) 48 bits HID® Corporate 1000® Disclaimer:
 HID® and Corporate 1000® are registered trademarks of HID Global Corporation or its affiliates. This application is not affiliated with nor endorsed by HID Global Corporation. 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 - Binary to number conversion - Hexadecimal to number conversion - Number to binary generation - Supports multiple bit lengths - Supports numerous card formats - Reverse calculation functionality ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/proximity-access-card-calc/id774601885/reviews.md ### 1/5 — App doesn’t work *2020-01-24* 34bit HID Standard does not calculate correctly when using reverse lookup If hexadecimal value input is entered the correct facility code and card number is displayed. **Developer response:** I'm sorry that you're having issues. Firstly, any support should be addressed to me via email and not as a 1 star review stating the app doesn't work. If there are any issues I would greatly appreciate the heads up so that I can address and repair as needed. Secondly, I took a look into the issue but could not find any errors. Keep in mind the reverse lookup does not take into account for parity bits. Please send me an email at phil@locksmithapps.com with details/screenshots so that I can look into this further. Thank you. ### 5/5 — Extremely Handy App to have! *2017-01-30* This is a great tool! handy to have and covers many card formats. **Developer response:** Thanks! Glad you like! ### 1/5 — Doesn't work at all *2016-12-09* I have several card types that I have used on an existing card access system, and know the raw hexadecimal code of my card and its translation to facility code and card number. This app doesn't even get it close and I wasted 99 cents on it. Used it to try and find the fac. code and card number of an unknown card and guess the bit structure, but it's translations are garbage. **Developer response:** Sorry you are having issues! I would love to help but I need to know the following: Which formats are not working for you? Would you be able to provide examples? Also, which device and iOS version are you using? ### 1/5 — Rubbish *2016-03-17* This is junk **Developer response:** I'm sorry to hear! Could you elaborate? ## Frequently asked questions about Proximity ### What is Proximity used for? Proximity is a calculator designed to help users determine the correct number and facility code for access cards or fobs. It can convert binary or hexadecimal card values into usable data, and also generate binary values from provided facility codes and card numbers. ### How does Proximity calculate access card information? Proximity offers two main calculation methods. You can input the raw binary value of the card or its hexadecimal equivalent. For hex input, you also select the necessary bit length from a wheel. ### Can Proximity generate access card data? Yes, Proximity includes a reverse calculator. You can input the facility code, card number, and select the desired format to generate the raw binary value for your access card. ### What access card formats does Proximity support? Proximity currently supports a wide range of formats, including various 26-bit, 31-bit, 33-bit, 34-bit, 35-bit, 36-bit, 37-bit, and 40-bit options from manufacturers like HID®, Indala, Simplex, Lenel, and Honeywell. ### Is Proximity compatible with my device? Proximity is compatible with iPhone and iPod touch devices running iOS 8.0 or later, and iPads running iOS 12.0 or later. It is not available for Android devices. ### How often is Proximity updated? The app was last updated on March 17, 2026, indicating ongoing development. New formats will be released in future versions as information becomes available. ### What is the price of Proximity? Proximity is a paid application, available for $1.99. There are no in-app purchases or subscription fees associated with its use. ### Does Proximity have ads? No, Proximity does not contain advertisements. It is a paid utility application that provides its full functionality without any ad interruptions. ## Version history (last 5 releases) ### 1.5.2 — 2026-03-17 -Under the hood repairs ### 1.5.1 — 2022-03-03 ---Note: This update requires a minimum version of iOS 12.0--- -Under the hood service to maintain a healthy running app ### 1.5 — 2020-06-03 -Under the hood service to maintain a healthy running app ### 1.4.2 — 2019-06-03 ---Note: This update requires a minimum version of iOS 8.0--- -Under the hood improvements ### 1.4.1 — 2017-10-02 -Minor iOS11 related repairs ## Apps similar to Proximity | App | Rating | Price | Category | | --- | --- | --- | --- | | [A-note](https://appshunter.io/ios/app/a-note/id1454807560) | — | Free | Utilities | | [Livly Hub](https://appshunter.io/ios/app/livly-hub/id1464225200) | 4.7 (13) | Free | Utilities | | [TCI Bitacora](https://appshunter.io/ios/app/tci-bitacora/id1464209780) | — | Free | Utilities | | [Miitems](https://appshunter.io/ios/app/miitems/id1464179200) | — | Free | Utilities | | [Pusher for Firebase](https://appshunter.io/ios/app/pusher-for-firebase/id1450720020) | 5.0 (1) | $0.99 | Utilities | | [龙嘉SCM供应商](https://appshunter.io/ios/app/scm/id1459545200) | — | 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 [hid proximity](https://appshunter.io/ios/topics/hid-proximity) · [card calc](https://appshunter.io/ios/topics/card-calc) --- *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 2026-08-25.*