Best sleep training clock?

[TheDrswife]

There seems to be quite a range, just looking for a fairly simple one that changes colour when it’s time to get up for DD 3.5. Any recommendations? TIA

GroClock. Can usually pick them up cheaply second hand and there's not much to go wrong. I like that there's 2 settings, I use one for weekdays and another for weekends!

Thank you!