Thanks for the recommendations. I'll look into those. Our local music store didn't have any electronic metronomes. So for now I'll try the apps.
Using Metronome apps
I'm using Soundbrenner on an Android phone at present (just the free app not the gadgets that can go with it). It is OK and easy to use.
Most importantly, I searched for one with a 'tap' button - and I use that all the time to set the speed. It means I can hum a tune and easily tap in exactly the speed I want to play it at.
I use two. Both free. MetroTimer and Pro Metronome. Why two? Because I am lazy. The MetroTimer is always left in 4/4, Pro Metronome is always left in 6/8. I play a lot of Irish music but it takes several keystrokes to convert either metronome from 4/4 to 6/8. If you really want to use just one Pro Metronome seems easier to adjust and set up. I often convert it to 9/8 for slip jigs and hop jigs. I may simply think it is easier because I change it more. MetroTimer has been in 4/4 from day one.
MertoTimer has an easier timing function, if you want to set it for two minutes or three minutes or whatever. That might be more useful for a drummer. Pro Metronome does have a timer and it works, it simply takes a couple more keystrokes to invoke it.
updated by @pondoro: 11/02/18 09:15:38PM