Android user here.
Habits to track my habits and get reminders to do things. I've got things as simple as brushing my teeth in here and have them spread across multiple areas. You can set different goals such as every day, 3 times a week, etc.
Google keep for short reminders/quick access info. The search is good and it integrates with my Google home devices to add items to my lists such as my grocery list
Todoist for task management. I love that I can use natural language when creating a task. I keep both work and personal tasks in here and plan out my day every morning using task time estimates. I've got labels for 5, 15, 30 minutes and higher for estimates for how long a task will take. Helps when I've got 30 minutes between meetings and need to find something productive to do during that time.
Notion for notes. I jumped on the hype train and thus far have found I don't use it to it's full potential. I could probably get by with something simpler but I don't want to migrate again (came from onenote)
Journey for journaling. I try to use it daily and include pictures if possible. This has really helped with my poor memory of past events. They will remind you of throwback entries which are always fun to go back and look at. I also record what I ate for the day (not tracking macros so this is good enough) and also things I'm grateful for here.
Google calendar for work and personal. Wife and I add each other to events which has helped immensely when juggling shared things, doctors appointments, kids events, and more.
Insight Timer for meditations. I try to meditate in the mornings and the premium features gives you access to some courses that I've found really great. It also has sleep meditations which don't always work for me but come in handy on occasion.
Those are the big ones. Every year around Christmas when I take some time off work I try to evaluate my productivity tools and process, and so far these have all been what I've settled on
The habits app is super quick to update. Takes me 30 seconds when I plug in my phone for bed. I do try to pick something to focus on each week, but the nice thing about the app I use is you don't have to do the things every day. Most of my goals are set to some number of times per week.