How can I get Apple Watch style Activity reminders on iPhone / iPad Example: watchOS reminds users to that it’s “Time to stand!”.

Is there any way to leverage the default apps provided by Apple to get these notifications on iOS devices?

The default reminders app is a bit too tedious for this and 3rd party apps seem to require you to open them regularly to prevent their notifications from being disabled.

Preferably, this can be accomplished without owning an Apple Watch, but I'll accept an answer which requires one if no other options exist.
For now I think you'll have to get an Apple watch or look into 3rd party apps.