Tactical logging
Call, RST, grid, DUPE, and UTC at type speed. The log is a weapon, not a form.
Field trial · ——:——:——Z
Operate anywhere.
Log everything.
Miss nothing.
Offline-first tactical logging for POTA, SOTA, WWFF, satellite operations and contesting. Not on a store yet — operators first.
- SFI
- 164
- K-INDEX
- 2
- GREYLINE
- OPEN
POTAPark activationoffline · picnic tableSOTASummit rungloves · 10-pointerWWFFFlora & Faunareference on the lineQRPKX2 / 705no laptop in the bagSATISS · AO-91AOS to SAT ADIFFT8WSJT-X companiongrid you never retypeCWPileup rateDUPE at paddle speedFDField Dayclass · section · CabrilloPOTAPark activationoffline · picnic tableSOTASummit rungloves · 10-pointerWWFFFlora & Faunareference on the lineQRPKX2 / 705no laptop in the bagSATISS · AO-91AOS to SAT ADIFFT8WSJT-X companiongrid you never retypeCWPileup rateDUPE at paddle speedFDField Dayclass · section · Cabrillo
02 — Live console
Type a call. Watch the desk answer.
OPS CONSOLE · FN42PR
——:——:——ZRETURN
- Name
- JAMES W HARTER
- Grid
- FN31pr
- Distance
- 199 km
- Azimuth
- 237°
- State
- CT
- License
- Extra
- DUPE
- CLEAR
- Band / Mode
- 20m SSB
SESSION LOG
0 QSO
Empty. Log K1ABC to see rate.
03 — Tactical logging
Capture QSOs faster than pen and paper.
Call entry, UTC, RST, and DUPE on one line. The console is built for a pileup, a summit wind, and a glove. If you can type the call, the QSO is already written.
UTC 14:32:08ZDUPE CLEAR
K1ABC
JAMES W HARTER · FN31PR · 59 20m SSB
04 — Space weather intelligence
Let data choose the best band.
SFI, K-index, A-index, and the greyline are not a sidebar. They drive which band Log73 puts under your fingers next.
SFI
164
K
2
A
8
NOAA
G1
- 40m92
- 20m84
- 15m61
- 10m28
05 — AI decision engine
Know exactly what to work next.
Band openings, park hunts, and the next bird. The engine reads your log, the clock, and the ionosphere — then points.
WORK NOW20m CW · EU long path · 18 min
HUNTK-4556 EM29 · 847 km
SATISS AOS 00:12:04 · 437.800
06 — CAT control
Full radio control in your pocket.
IC-705, KX3, G90, FT-891. Frequency and mode belong to the radio. The log never asks you to retype what the VFO already knows.
14.062.00
IC-705 · CW · CI-V LINK UP
07 — Satellite operations
Track the sky in real time.
ISS, AO-91, SO-50. AOS, TCA, LOS, footprint, and a SAT-mode log that LOTW accepts without a second editor.
ISS12°221°AOS
AO-91—041°00:26
SO-50—188°01:04
08 — Offline power
Built for places without internet.
Local storage is the source of truth. Recovery snapshots survive a dead battery. Sync is a replica you turn on when you get a path.
STORELOCAL · ENCRYPTED
SNAPSHOT#A7C2 · 14:31:02Z
SYNCARMED · WAITING PATH
09 — Global operations map
A control center for worldwide radio operations.
Parks, summits, greyline, aurora, HF paths, satellites, CQ zones, Maidenhead. Switch 2D and 3D without leaving the desk.
10 — Platform
Every surface of a field operation. One OS.
AI decision engine
Next band, next park, next bird. Recommendations from live space weather and your log.
GNSS grids
Maidenhead from the phone GNSS. Distance and azimuth on every callsign.
Satellite ops
ISS, AO-91, SO-50. AOS to LOS with Doppler cues and SAT ADIF.
CAT control
IC-705, KX3, G90, FT-891. Frequency and mode belong to the radio and the log together.
FT8 companion
Decoder-speed capture beside WSJT-X. Grids you never retype.
CW-first rate
A log that keeps up with a paddle. Macros, RST, and DUPE without looking down.
POTA native
Park references, hunter/activator roles, and ten-QSO status on the line.
SOTA native
Summit codes, points, and glove-sized targets on the cone.
Cloud when you say
Encrypted sync is a replica. Offline is the source of truth.
ADIF & Cabrillo
LOTW, Club Log, POTA, Field Day. Exports that robots accept the first time.
Field security
On-device encryption, snapshots, and no log hostage to a login page.
Localization
Operators are global. The OS speaks more than one language — and still UTC.
11 — Product
Four skins. One log. Any light.
Dark for the shack. Phosphor for the field. Red for night vision. Vintage when you want the radio to feel like 1958 and log like 2026.
LOG7314:32:08Z
CALL
K1ABC
JAMES W HARTER · FN31PR
DIST
187 km
AZ
047°
DUPE
CLEAR
RST
59
14:28ZN7MKT20m CW
14:26ZEA2L20m SSB
14:21ZVK2BYF15m FT8
Log QSO
12 — Field programs
Built for the field. Not a vanity count.
Log73 is in field trial. These are the programs it is built for — not a fake user metric, not borrowed callsigns.
POTA
Park activations
SOTA
Summit ops
WWFF
Flora & Fauna
SAT
ISS & LEO
FD
Field Day
POTA
No cell at the picnic table
The logger that needs LTE dies at the gate. Log73 writes the QSO on the device. Spots wait.
SOTA
Gloves, wind, a 10-pointer
Summit logging is a thumb problem. Large targets, UTC on the line, DUPE before you work the same chaser twice.
CAT
The radio already knows the frequency
IC-705, KX3, G90, FT-891. If the VFO has 14.062, the log should not ask you to type it.
SAT
AOS is not a calendar reminder
ISS and LEO passes are a timeline. SAT_NAME and SAT_MODE belong in the ADIF, not a comment.
FD
Dupe is not a suggestion
Field Day collapses when the sheet is late. Class, section, and identity at type speed — Cabrillo on Monday.
QRP
The laptop stays home
A 705 plus a phone is a station. Log73 is built so the computer in your pocket is enough.
13 — Comparison
Paper is honest. The cloud is late. Log73 is first.
| Capability | Log73 | Paper | HAMRS | QRZ | Generic |
|---|---|---|---|---|---|
| Offline-first log | Partial | ||||
| On-device GPS / Maidenhead | Partial | ||||
| AI band & target engine | |||||
| Satellite passes + SAT ADIF | |||||
| CAT (705 / KX3 / G90 / 891) | |||||
| Native POTA references | Partial | ||||
| Native SOTA references | Partial | ||||
| Field Day dupe + Cabrillo | Manual | Partial | Partial | ||
| Recovery snapshots | |||||
| Red-night / tactical themes |
Partial means the feature exists in a limited or add-on form.
14 — Field notes
How operators actually log in the field.
All field notes
15 — FAQ
Straight answers.
Can I download Log73 from the App Store today?+
Not yet. Log73 is in a controlled field trial. Request access with your email and callsign. When a slot opens, we send credentials — there is no fake store button.
Is Log73 just another ham radio logbook?+
No. Log73 is a tactical operations layer: logging, GNSS, CAT, space weather, satellites, and offline sync in one OS. The log is the core, not the product.
Does it work without internet?+
Yes. Logging, DUPE, GPS grids, CAT, and cached satellite elements run on the device. Sync and spots resume when you have a path.
Which radios are supported?+
Field CAT profiles ship for Icom IC-705, Elecraft KX2/KX3, Xiegu G90, and Yaesu FT-891, with ADIF-friendly operation for any radio.
Can I export to LOTW, POTA, and Club Log?+
ADIF and Cabrillo export from the device. SAT, park, and summit fields are included so the upload is not a second project.
Is there a desktop version?+
The same log and operations map are built for phone, tablet, and desktop. Field-first, shack-capable. Trial slots open by surface.
How is this different from HAMRS or QRZ Logbook?+
HAMRS is a capable portable logger. QRZ is a cloud logbook. Log73 is the operations system around the log: AI band choice, CAT, satellites, and offline as the default.
Do you support WWFF and contesting?+
WWFF references, Field Day exchange, and contest DUPE/Cabrillo are in the same OS as POTA and SOTA.
What happens if the app is killed mid-activation?+
Every QSO is written locally as it is entered. Recovery snapshots restore the activation if the process dies.
Field trial
Bring a radio. Tell us what broke in the field.
No store listing. No fake download. Request a slot and operate when it opens.
No App Store listing yet. Operators first.