Log a QSO in a few taps: callsign, frequency, RST. QSO-LOG fetches the operator's name and city from QRZ.com or QRZ.ru, works out the distance and path, and exports the log to ADIF or a contest report.
Big buttons and type, so you can log during the contact. The phone and computer versions do the same things.
A new card opens with the cursor in the callsign field; UTC date and time are filled in, mode and frequency carry over from the last QSO.
From the fourth letter the app looks the station up and fills in the name, city and grid locator. It calculates bearing and distance and draws the path on a map. Another map shows every station you've worked.
Everything found goes into the search history, so a card can be filled from it offline.
CONTEST MODE: callsign and exchange on a big keypad — and on to the next. Serial numbers count up by themselves or a fixed exchange is sent (MO69, EU); any QSO can be fixed later.
Your log in charts: QSOs per day, bands, modes, countries, hours on the air, distances. Period and filters in one row, and the result can be shared as a picture.
Hold "Add QSO" and speak — the note stays with the QSO and can be shared to a messenger.
The Morse tab has the code table, plays any text at 5–40 WPM, and trains sending (on-screen or real key, iambic A/B) and receiving.
Space, Enter, ↑ to fix the last QSO, commands like "20m" or "CW" right in the callsign field.
QSOs from phones and the computer meet in your own Google Sheet when you press "Sync".
ADIF, CSV, Cabrillo and ЕРМАК. Only new QSOs are exported by default, and each card keeps a dated mark.
Band plans, Q-codes, phonetics, cables and SWR, antennas, country and region by callsign.
A dark theme for night operating, large type and a screen that stays on during a QSO.
The log lives on your device, no sign-up and no cloud. The source code is on GitHub.
On the phone — Android 8.0 or newer. Tap a picture to enlarge it.
Current versions: Android 0.40.2, desktop 1.18.0. Files are downloaded from GitHub.
Android: open the downloaded APK and allow installs from that source — the app is not on Google Play yet. macOS and Windows: the builds are unsigned, so the system warns on first launch; on a Mac, right-click the app → Open. See the install guide on GitHub; older versions are on the releases page.
Yes. It is free, with no ads or subscriptions, and open source under the MIT license.
Android 8.0 or newer, Windows 10 and 11, macOS 11 or newer (Apple M and Intel) and Linux (Ubuntu 22.04+, Debian 12, Mint). The phone and computer versions do the same things.
QSO-LOG looks the callsign up on QRZ.com and QRZ.ru and fills in the name, city and grid locator. If both are silent, HamQTH gives the country and region. Accounts are added in Settings.
ADIF and CSV for the log, Cabrillo and ЕРМАК for contest reports. A log can be imported from ADIF too.
Yes, through your own Google Sheet: QSOs from every device meet there when you press "Sync".
No. The log, reference and calculators work offline. The internet is only needed for QRZ lookups, maps and sync.
The desktop builds are not signed with a paid certificate. On a Mac open the app with right-click → Open; on Windows choose More info → Run anyway.