# CRC Calculator > Generates cyclic redundancy check (CRC) bytes from input data. (iPhone/iPad app by Firmtronics Pty. Ltd..) - Source: https://appshunter.io/ios/app/crc-calculator/id984488943 (this page in markdown: same URL + `.md`) - Developer: [Firmtronics Pty. Ltd.](https://appshunter.io/developer/1318424787) - Category: Utilities, Productivity - Price: $0.99 - Age rating: 4+ - Requires: iOS 17.6 · 1 MB - Languages: American English - Released: 2015-04-28 - Data updated: 2026-09-01 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/crc-calculator/id984488943/reviews.md ## What is CRC Calculator? CRC Calculator generates cyclic redundancy check byte(s) using the remainder from a polynomial division on the input data. The supported generated check byte(s) are 8, 16, 32 & 64. Data can be manually entered in hexadecimal format or can be sourced from a file that is uploaded through the integrated document explorer. CRC check values can be generated in a normal (most significant bit first) or reversed (least significant bit first) format. This is an essential tool for any developer or software engineer. ## Key features - Generates 8, 16, 32, & 64-bit CRC bytes - Input data via manual entry (hex) - Source data from uploaded files - Supports normal and reversed CRC formats - Integrated document explorer ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/crc-calculator/id984488943/reviews.md ### 1/5 — 程序打不开 *2015-08-16* 购买的这个程序打不开，咋办？ ### 4/5 — Better than any online calculator *2015-05-04, version 1.0* This package was great for checking the checksums while I was debugging some USB transactions. It was good to have a native calculator that doesn't rely on an Internet connection. Great to have all CRC byte lengths in the same package. ### 5/5 — Fantastic app! *2015-04-30, version 1.0* This tool was great for generating the CRC checksum on my serial network packets. I simply copied and pasted in the whole network packet and put in the CRC poly and the tool cracked the checksum out with ease. The reversed (LSB) is a great feature as i haven’t come across another calculator tool that can handle this notation yet. ### 5/5 — Great tool for embedded systems development *2015-04-29, version 1.0* This utility came in handy for verifying that my code was storing the correct CRC checksum in an EEPROM memory chip. Great simple easy to use interface. ### 4/5 — Great app!! *2015-04-29, version 1.0* Fantastic little app. Was debugging a network the other day and this handy little tool calculated the CRC 64 checksum perfectly for me to verify the processor was working correctly. Definitely recommend it for anyone needing to calculate a CRC checksum. ## Frequently asked questions about CRC Calculator ### What CRC Calculator versions are supported? CRC Calculator is available for Mac, iPhone, iPad, and iPod. It was last updated on April 13, 2026, with version 3.1. ### How does CRC Calculator generate check bytes? CRC Calculator generates cyclic redundancy check bytes by performing polynomial division on the input data. It supports generating 8, 16, 32, and 64-bit check bytes. ### Can I input data from files into CRC Calculator? Yes, CRC Calculator allows you to source data from a file through its integrated document explorer. You can also manually enter data in hexadecimal format. ### What CRC formats does CRC Calculator support? CRC Calculator supports both normal (most significant bit first) and reversed (least significant bit first) formats for generating CRC check values. ### What is the age rating for CRC Calculator? CRC Calculator has an age rating of 4+, making it suitable for a wide range of users. ### Does CRC Calculator have ads? CRC Calculator does not contain advertisements, providing an uninterrupted user experience. ### What is the price of CRC Calculator? CRC Calculator is available for a one-time purchase of $0.99. ### How often is CRC Calculator updated? CRC Calculator was last updated on April 13, 2026, indicating regular maintenance and potential feature additions. ## Version history (last 5 releases) ### 3.1 — 2026-04-13 1) Rewrite application to use Auto Layout to give more optimised UI layout for specific device constraints 2) Rewrite custom hex keyboard to now include system like delete and backspace button functionality 3) Fixed possible bug when reflecting the output result 4) Changed iOS minimum deployment target from 14.0 to 17.6 ### 3.0 — 2023-06-30 This version now includes functionality to calculate a CRC on a file with any size or extension. The file can be selected through the integrated document explorer. ### 2.1 — 2023-03-28 1) Update app for macOS compatibility 2) Update app to latest App Store Connect submission standard ### 2.0 — 2020-02-14 1) Custom hexadecimal keyboard for quicker CRC data input 2) Stores favourite CRC polynomials between app sessions 3) New setting to reflect input data and output data 4) User interface improvements ### 1.4 — 2018-01-11 Application name changed for iTunes store to make it less verbose. ## Apps similar to CRC Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Ford PATS Incode Calculator](https://appshunter.io/ios/app/ford-pats-incode-calculator/id1583179610) | 2.8 (28) | $1.99 | Utilities | | [TextUtils: Tools & Generators](https://appshunter.io/ios/app/textutils-tools-and-generators/id6477532053) | — | Free | Utilities | | [Insect & Bug Identifier](https://appshunter.io/ios/app/insect-and-bug-identifier/id6748840011) | 5.0 (2) | Free | Utilities | | [URLtoQR extension](https://appshunter.io/ios/app/urltoqr-extension/id1601259733) | 5.0 (3) | Free | Utilities | | [ESPHome-WLED Device Manager](https://appshunter.io/ios/app/esphome-wled-device-manager/id6754686752) | — | Free | Utilities | | [Bug Identifier: InsectAI](https://appshunter.io/ios/app/bug-identifier-insectai/id6743463658) | 4.9 (33) | Free | Utilities | ## Related topics [crpc 1973](https://appshunter.io/ios/topics/crpc-1973) · [ssrc ti](https://appshunter.io/ios/topics/ssrc-ti) --- *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 2026-09-01.*