Should have read more, I wasn’t aware that was part of the question. I’m just posting about niche usage apps I like. I don’t use them often, but they’re essential for their niche.

Idk if this counts, but I use the Reminders app on my phone to create packing lists for work travel. Very easy to uncheck everything then re-check off things as you pack them. Keep building a perpetual packing list and you’ll never forget things. Lists in general are awesome for offloading cognitive workload.