CosmoYum
CosmoYum is made by one person, so answers take a few days rather than a few minutes — but every message is read by a human, not a queue.
If something went wrong, these three lines save a round of questions:
Writing from the app (Settings → “Contact support”) fills the version into the subject line for you; it is also printed at the bottom of the settings screen.
Most of what people ask is already answered on the frequently asked questions page: what you can correct in a record and what you can’t, why the figures differ from another app, what uses up a daily recognition, where photos go, and how to move your diary to a new phone.
To delete your account and everything in it you don’t need us at all: Settings → Account → “Delete account and data”, described in full on the “Delete account” page.