CRC Calculator vs 74Log

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.

73Log is a modern amateur radio logging app designed for ham radio operators who want to track their contacts (QSOs) easily and efficiently. KEY FEATURES: • Quick QSO Logging — Log contacts in seconds. Band, mode, frequency, and power carry over from your last QSO automatically. • World Map — See your contacts plotted on a map with lines showing your reach. Filter by band or mode. Toggle repeaters, QSOs, and grid squares on and off. • Repeater Directory — Browse, favourite, and contribute to a shared repeater directory. Long-press for quick programming details. Output/Input frequencies clearly labelled. • GPS & Grid Squares — Auto-fill your Maidenhead locator from GPS, or pick grid squares by tapping the map. Live distance and bearing to the other station. • All Bands & Modes — 160m to 13cm, SSB, CW, FM, FT8, DMR, D-STAR, C4FM, and more. • Callsign Book — Save operator info, mark favourite contacts, and look up callsigns on QRZ.com. • Offline First — Log contacts without internet. Everything syncs automatically when you're back online. • Cloud Sync — Your logs sync securely across all your devices. • Search & Filter — Find past contacts by callsign, band, mode, or date. • Distance Units — Choose kilometres, miles, or nautical miles. Whether you're operating from home, portable, or mobile, 73Log makes it easy to keep an accurate log of all your amateur radio contacts. 73!