And use something like coconutBattery to check. iOS reports 82% while coconut reports 62% (!) on my 2 year old 6s. Definitely getting that replacement ASAP.
I wouldn't mind seeing a two-tier approach, with authoritative municipal data as a base (see https://openaddresses.io/ for an example of collecting a large number of sources and normalizing it) with user-submitted edits on top.