RadioBook
A channel reference for your radios — add each radio you own, then its channels with whatever programming info you actually have. Real accounts, a live Transmit Map (DX spots, POTA activation, real elevation/coverage search, community-added repeaters), band conditions from real solar data, and six switchable color themes.
This file is served straight from my own server — not a third-party app store, no middleman. Want to run your own copy end to end, server included? See the self-host guide.
- Add radios and their channels — frequency, offset, tone, mode, power, whatever your radio's manual uses
- 🗺️ Transmit Map — live DX spot great-circle lines by band, a real day/night grayline, and a USGS topo layer with real elevation contours, all in one map
- 🏕️ POTA on the map — see who's activating a park right now, or tap one to activate it yourself and log contacts on the spot (they land in your Logbook, POTA-tagged, ADIF-ready)
- 📡 Tap-to-scan elevation search — pick a spot and a radius, and it scans real USGS elevation data plus OpenStreetMap roads/trails to mark the best nearby high ground you could actually park or walk to
- 🗼 Add your own repeaters/towers to the map, public (everyone sees it) or private (just you)
- 🧰 Go Boxes — put radios in a box, stick a printed barcode on it, and scan to see what's inside; one-tap Scan button on the home screen
- 🎚️ Presets per radio (JOTA, SKYWARN, whatever you name them) and Export for CHIRP to program the radio from a computer
- 📖 A graphical US band chart with Extra / General / Technician privileges, a "What band is this?" lookup, and a 🎧 Listening List of frequencies worth hearing
- 📦 Works with InventoryBook, a barcode inventory app — it can bring your Go Boxes and radios over, and tapping a radio there opens its channels here
- Band Conditions — 10m rated from live solar flux/K-index data and a terrain-aware 2m/70cm range calculator
- 📒 Logbook and 📇 Phone Book — log contacts, export ADIF/CSV
- 🔔 Net Schedules with a real calendar, custom recurrence (weekly, biweekly, monthly), and per-net colors
- 📚 Repeaters — import a CSV, or sync live from your own installed RepeaterBook app
- Tap any callsign anywhere in the app to open it on QRZ.com
- ⚙️ Settings → Themes — six color palettes, applied instantly, app-wide
- Real accounts, reachable by anyone — no Tailscale or invite needed; your radios stay local, an account just backs them up
- Download the APK above on your phone, then install it — Android will ask you to allow "Install unknown apps" for your browser the first time
- Open the app and create an account — any username/password, reachable by anyone, no invite needed
- Tap + to add your first radio, then tap into it to start adding channels
DT Prep
An emergency-preparedness planner that works with no internet, ever. Build a plan for each scenario — house fire, hurricane, bug-out — out of the sections it actually needs, and hand it to someone else’s phone by QR code with no Wi-Fi or signal at all.
Served straight from my own server — no app store, no account, no tracking. The app itself has no internet permission at all.
- 📻 PACE communication plans — Primary, Alternate, Contingency, Emergency — saved as defaults you can drop into any plan
- 🚗 Evacuation and 🏠 shelter-in-place plans, meeting points with GPS pins, and distance + compass direction to them from GPS alone
- 🎒 Supply checklists from editable templates (bug-out bag, severe weather, hurricane, winter, wildfire, vehicle, a one-day HT comms bag) with your own gear presets
- 👪 Set your household size and quantities like “1 gal/person/day” are worked out for you; have/need tracking and expiry reminders
- 🚨 A one-tap emergency screen — where to meet, who to call, how to get out — plus a home-screen widget
- 📤 Share a whole plan phone-to-phone by QR code, back everything up to a file, or export a plan as a PDF to print
- 📖 Built-in offline reference: first aid, water, fire, shelter, signaling, communication, sanitation, evacuation
- Download the APK above on your phone, then install it — Android will ask you to allow “Install unknown apps” for your browser the first time
- Open DT Prep — a short walkthrough runs the first time; tap + to create your first plan
Bug report or feature idea? Get in touch.