Skywave: RF Field Kit
Offline ham radio field kit
$0.99 · Designed for iPad. Not verified for macOS.
The whole shack in your pocket: repeaters, band plans, antennas, satellites and CW — all computed on your device, fully offline. No account, no ads, no cloud.
Skywave is a complete amateur-radio and RF reference that runs entirely on your device. Every lookup and every calculation happens locally — so the whole shack works on a summit, in a basement, on a plane, or anywhere the signal drops. No account. No subscription. No cloud round-trips. Nothing you enter ever leaves your iPhone or iPad.
Built for licensed hams, shortwave listeners, preppers, and anyone who wants serious RF tools without ads or logins.
REPEATER DIRECTORY
• 22,000+ repeaters worldwide, searchable offline by callsign, city, or network
• Output and input frequency, shift, CTCSS/DCS access tones, mode and status
• Filter by band, mode, digital-only, tone, or operational status
• Sorted by distance from your location, with bearing, distance and a map for each
BAND PLANS & PRIVILEGES
• Full US HF/VHF/UHF band plan by license class (Novice → Extra)
• Tap in any frequency to see who may operate there, in which modes, at what power
• Grouped by LF/MF/HF/VHF/UHF with per-segment detail
ANTENNA & FEEDLINE MATH
• Dipole, quarter-wave vertical, 3-element Yagi and full-wave loop dimensioning in metres and feet
• Coax loss for a dozen common cable types, including the extra loss from SWR
• VSWR, return loss and mismatch loss from power, or from a complex load impedance
• Propagation: free-space path loss, radio horizon, dBm ↔ watts
GRID & GEODESY
• Maidenhead grid ↔ latitude/longitude conversion
• Great-circle bearing (short and long path) and distance between any two grids or cities
• A bundled database of 230,000+ world locations for instant grid and beam headings
SATELLITES
• On-device SGP4 orbital propagation from bundled amateur two-line elements
• Live look angles — elevation, azimuth, range, sub-satellite point and altitude
• Pass predictions for the next 48 hours from your station, with AOS/LOS and max elevation
• Real-time Doppler shift for any downlink frequency
CALLSIGN / DXCC LOOKUP
• Resolve any callsign or prefix to its entity and continent
• Beam heading, short/long path and distance from your grid
CW / MORSE TRAINER
• Send any text as clean, click-suppressed Morse synthesised on-device
• Koch-method practice with adjustable character sets and group counts
• Full reference chart; adjustable speed, Farnsworth spacing and sidetone
PRIVATE BY DESIGN
Skywave collects nothing and connects to nothing. Location is used only on-device to set your grid and sort nearby repeaters, and it degrades gracefully when unavailable.
Bundled reference data is drawn from openly-licensed public sources (HearHam repeater listing, GeoNames under CC-BY, CelesTrak/AMSAT public TLEs, the ITU call-sign series and the FCC/ARRL US band plan) and is fully attributed in-app.
Skywave is a reference tool. Verify current regulations and refresh satellite elements before operating. Not affiliated with the FCC, ARRL, AMSAT, CelesTrak, GeoNames or HearHam.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Robert Corbin, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Robert Corbin
- Size
- 16.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Robert Corbin
