Settings → Restore Purchases, or the Restore link on the paywall itself. Pro is tied to the Apple Account that bought it, so it follows you to a new iPhone at no further cost — but the device has to be signed in to that same account. If a restore comes back empty, send the address above the email on your Apple Account and the approximate date, and it can be checked.

That is the free calculator working as designed, not a bug. It is a scratchpad: one position, cleared on each launch, which suits a quick what-if on whatever you are watching today. Keeping a ticker and its goal between sessions — and logging the buys and sells against it — is what Pro adds.

Worth reporting, and easy to settle: the arithmetic is deterministic, so the same inputs always produce the same answer. Send the five figures — shares, average cost, exit price, borrow rate, days held — and whether margin was on, and the result can be reproduced exactly rather than guessed at. Interest accrues daily, which is the usual reason a total differs from a calculator that accrues monthly.

Refunds are Apple's to give, not ours — the purchase never passes through Trade Goal. Request one at reportaproblem.apple.com with the Apple Account that bought it. If the reason is something the app got wrong, the address above would still like to hear it.

iPhone on iOS 17 or later. There is no iPad or Mac build yet, and no Android one. Nothing needs a connection, an account or a sign-in, so if it installs, it works.

Ask. Some things are missing because nobody has asked yet, and those are worth hearing about. A few are absent on purpose — live prices, adverts, accounts and anything resembling advice — and the reasons are set out above rather than hidden behind a roadmap.