Write to me from inside the app
Open Tortuba, then About → Contact a human → Send Feedback.
This is the route I'd pick myself. The message arrives already carrying your app version, your device and its iOS version, and your language — so I can usually answer the question instead of asking you three of my own first.
Or send me a DM
If the app won't open, or you'd just rather not write an email, I'm sowenjub nearly everywhere. A DM on any of these lands with me.
Whichever one you pick, it's me reading it — Goodwhale is one person, and that person is me.