Support

Email pipebooktheapp@gmail.com and a human answers — the same one who wrote the app.

Think a number is wrong? Say so first. Accuracy reports jump the line, every one gets investigated against the published standards, and the fix ships to everyone.

Common questions

Does it need signal? No. Everything works fully offline, forever. There is no sign-in and no license check.
Where do my starred sizes live? On your phone only. Nothing leaves your device.
What does the † mark mean? That value hasn't finished our dual-source verification yet. Verify against the spec before cutting.
How is the data verified? Every dimension is extracted from two independent published sources, machine-compared, and disagreements are hand-resolved against a third before shipping.
Can you add a table or calculator? Probably. Email what you need and where you'd normally look it up; requests from working fitters set the roadmap.