borrow your kitchen timer from home!
When you have used it in anger you will know EXACTLY what features you really want and then you can go around the cook shops till you find one you like at a price you are prepared to pay.
I have a cheap stopwatch velcro'd to my dash, impulse buy from Maplins because it is exactly the same shade of yellow as the aircraft is. It has an alarm which is not loud enough to hear in the cockpit but is useful during stopovers. I do tend to just glance at the time and remember it rather than set the stop watch for in flight navigation timings. Can't be bothered with pressing fiddly buttons and multi options. Look, note, remember, sorted.