Since finding out that I’m losing my job soon I needed to look outside of Apple a bit into free services. I’ve cancelled a lot of my subscriptions now and when looking at to do apps that were free and worked on Android and iOS I struggled more than I thought.
I tested a few apps including TickTick and Todoist but I found that their free tier was unusable for me as they were too limited. You couldn’t do things like repeating dates or reminders.
Google doesn’t offer a To Do app worthy of using cross platform so the only choice I’ve found is Microsoft To Do.
On iOS it’s lacking more than on Android, for example there is no widget on iOS. If you are ok with this then jump in on To Do.