I've used COL Reminder (I'm on android) app for repeating reminders and keeping track of tasks. Now, I just put it on my phone calendar as a repeating meeting with a reminder, that ends up being easier on me since it is linked to my google calendar.
I included:
Cage cleaning - general
Cleaning specific cage items
Supplement schedules
Feeder cycles
UV bulb replacement
Watering certain plants
Misting feeder bins
Cleaning feeder bins
Feeding feeders
Expiration dates for supplements
Reminders when to order more feeders
And a long list of other things
Maybe a little overkill, but it helps me keep track of everything.
For tracking husbandry issues, temps, RH, eating, shedding, weight, etc, I'm embarrassed to say I do all that by hand in a notebook I keep next to the enclosure. Low maintenance method but not very slick tech-wise.