There are multiple apps I "can't live without" but they are all default apps. (Not really "can't live without" but that, to me, justify the cost of buying and

There are multiple apps I "can't live without" but they are all default apps. (Not really "can't live without" but that, to me, justify the cost of buying and the routine of wearing.) I do sometimes want to track or do some things in a certain way that the default apps don't... but I can ever seem to find an existing app to do it either. The apps exist but don't work the way I want any better than the built-in ones. (Since I'm a developer, I sometimes whip up a prototype watch app myself, though I have to admit that while some have proved useful for a while, none have become a killer app for me, no matter how much I thought I wanted it originally. I do like my couch to 5K app.)