Support
Something not clear, or not right? Tell us.
Get in touch
Write to feedback@exacalc.app.
Report a problem
The quickest way is from the app: open Settings (at the top, or behind ⋯ when the text is large) and choose Report a Problem. The sheet shows the whole report before anything is sent: your words, the app and device facts, and the state of the calculator. It goes by Mail, only when you press Send.
Please say what you typed, what you expected and what you saw. See Privacy for exactly what a report holds.