HamClock is targeted for portable amateur radio operators.
It displays time/date and user notes related to various portable locations on a single screen.

Notes are used to record location name, QTH locator, callsign, activation details for SOTA, WCA, WFF or other activities, event info etc.

Main screen is divided into three sections, which can show one of the following:

Local date / time
GMT date / time
User notes
Reminder to transmit callsign every 10 minutes
Simple Maidenhead grid (QTH) calculator

To change content, just scroll that section left or right.