Powershop daily power usage
This one might be a bit niche I suspect, but I’ll roll with the suggestion anyway! Powershop has an API (https://github.com/powershop/powershop-api/wiki/Welcome-to-Powershop's-API) for getting you’re daily power usage. I already track this in their app, but having it linked into Exist’s data and goals (trying to get below average usage etc) would be awesome.
I’m sure other power providers possibly also have APIs, although the local nature of power companies probably makes this very niche and wouldn’t benefit a huge range of users.