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

Fully customizable

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


Integrated with LoTW, eQSL,, HamQTH, QRZCQ, Clublog, HRDLog, SOTA, IOTA it's your unique interface to external world


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

Log4OM 1.31.0 Released

Release notes Version 1.31.0

– Added IOTAMAPS.ORG support on IOTA panel.
– Added more controls on TCP incoming calls to check payoad before deserialization (trace mode)
– Added checks to WAS import in order to try fixing non coherent data for USA, Alaska and Hawaii. Improvements on WAS award recognization
– Updated historic SCL file
– New log4om.status/ communicator.status files created in INI format on C:\ (for portable version) or settings folder (for installed version) in order to provide auto-configuration informations to JTAlert and other software.
– Fixed mysql query issue on statistics (thanks Dom M0BLF for the catch)
– Fixed an issue with Communicator that prevented under some circumstances the restart of TCP services after a previous stop
– Fixed a label inversion in Settings – CAT & Cluster (italian version only)
– Bandplan files updated (Region 1). Note: User modified bandplan (_user.xml) prevent use of official files
– Fixed refresh button on locator statistics map

Log4OM 1.30.0 Released

Due to the high amount of requests to manage “DATA” mode in LOTW download, following recent FT8 digital mode release, we exceptionally released a new version of Log4OM with the following features:

Release notes Version 1.30.0


– LOTW user list now retrieved directly from LOTW website. Small enhancements in retrieval functionality.

– Log4OM now reads LOTW “DATA” mode as generic digital mode and matches all QSO in digital modes made with the indicated station on +-30′ range, same band


Log4OM 1.29.0 released

Release notes Version 1.29.0



– LOTW download doesn’t change the gridsquare if something it’s already saved on the QSO

– Implemented great circle representation when drawing QSO on map

– Winkeyer Lead-In and Tail value increment changed from 10 to 1 per click.

– Hamlib libraries updated to main revision 3.x

– Changed residual dates from LOCAL to UTC on all software features.

– Fixed DXCC export statistics

– LOTW QSO download now updates country if different from log.

– DC reference removed from WAS list

– Fixed code in the awards management to be more compliant with awards.xml file

– Added support to 4m awards in ARRL / CQ awards

– Fixed counter in GRIDSQUARE statistics

– New bands supported in IOTA award (6m and upper)

– 2 new advanced options in SETTINGS – CAT (mainly Elecraft users)

– Send FREQUENCY command before MODE command when changing both parameters

– Add delay (fixed 500 ms) between FREQ and MODE subsequent messages (or MODE FREQ according to previous parameter)

– Added transverter support under program settings – CAT menu (add/remove amount in KHz) working at low level near CAT subsystem.

– Added JT9, FT8 mode support

– Small performance improvements in datagrid QSO visualization