Log4OM modern user interface runs on PC, Windows Tablet and can be started also from an USB key with limited resources.

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Fully customizable

Over a hundred options makes Log4OM your best friend, easily following all your needs.

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Integrated with LOTW, EQSL, QRZ, HAMQTH, Clublog, HRDLog, SOTA, IOTA it's your unique interface to external world.

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Your log is always available and automatically uploaded to external services and exported in ADIF everytime you use the software.

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Log4OM 1.21.0 released

Release notes for 1.21

• Antenna offset now working correctly with PST Rotator

• Added option to disable cluster Keep Alive message to enable users to connect to the SOTA cluster

• Country identification optimized to recognize DXCC entity for historic QSO’s

• SOTA CSV merge now imports QSO’s that are not already present in the logbook.

• Correct solar data is now displayed

• Added sunspot number to solar data displayed in main form header

• Fixed double refresh on cluster double click

• Fixed missing leading zero issue in contest exchange

• Prevented creation of Log4OM log into program folder

• All lookup options added to recent QSO’s

• Fixed lost focus on MODE change

• Added an option to prevent a refresh on QSL MANAGER screen while saving QSO information

• Changed field order of QSL fields in edit screen

• Changed the LOTW member lookup to for greater accuracy


New Log4OM home

Welcome to the new Log4OM website.

Our forum has been updated and moved here.

Log4OM @ DXCoffee Party 2015 in Florence

Log4OM will be presented at the DXCoffee Party in Florence (ITA) in April during the Florence Hamfest. A nice opportunity to meet the author.


Log4OM 1.20 available for download

New features

• Added capability to set custom SQL queries in log searches.

• New solar flux data charts and displays added in menu and recorded with logbook entries.


• “-” separator removed from contest auto-generated SENT value

• ROS mode displays the RST as dB

• Fixed incorrect data being saved on QSL sent/rcvd status under some conditions

• A & K indexes set on QSO using planetary data

• LAT/LON now being updated on lookup and added to log entry

• CW Skimmer and RBN now displaying in cluster correctly