HamHub is the all-in-one amateur radio companion for Android. Whether you're a newly licensed Technician or an experienced Extra class operator, HamHub puts essential ham radio tools in your pocket.

LOGBOOK
• Log QSOs with callsign, frequency, mode, RST, and notes
• Track contacts on an interactive map by grid square
• Import and export standard ADIF files
• Filter and search your contact history

REPEATER FINDER
• Search thousands of repeaters from RepeaterBook
• Filter by band, mode (FM, DMR, D-Star, YSF, P-25, NXDN)
• Find repeaters near your location or any grid square
• View repeater details including offset, tone, and status

PROPAGATION CONDITIONS
• Real-time solar data: SFI, sunspot number, A-index, K-index
• HF band condition forecasts (day/night)
• Signal noise levels and geomagnetic field status
• Data refreshes automatically from NOAA/SWPC

ISS TRACKER
• Track the International Space Station in real-time
• View current position, altitude, and grid square
• Plan your next satellite contact with NA1SS
• Powered by N2YO satellite tracking API

CALLSIGN LOOKUP
• Search the FCC ULS database via Callook.info
• View license class, name, address, and grid square
• Check grant and expiration dates
• Look up previous callsigns

CONTEST CALENDAR
• Browse upcoming amateur radio contests
• View contest dates, times, and rules
• Filter by timeframe (this week, this month)
• Data from WA7BNM Contest Calendar

BAND PLANS
• Complete US amateur band allocations
• Mode segments and license class privileges
• Quick reference for all HF, VHF, and UHF bands
• Based on current FCC Part 97 regulations

CALCULATORS & TOOLS
• Dipole, vertical, and loop antenna length calculator
• Wavelength and frequency converter
• Power (watts to dBm) calculator
• SWR and return loss calculator
• Grid square distance calculator

REFERENCE
• ITU Q-codes with meanings
• International Morse code chart
• NATO phonetic alphabet
• RST signal reporting system
• Band frequency quick reference

OTHER RADIO SERVICES
• CB radio channels and regulations
• FRS/GMRS frequencies and power limits
• MURS channel assignments
• NOAA Weather Radio frequencies
• Marine VHF channel guide

FEATURES
• Modern Material Design 3 interface
• Dark mode support
• Works offline (except live data features)
• No ads, no tracking
• Free and open source

HamHub is designed by hams, for hams. We welcome feedback and feature requests from the amateur radio community.