InvoicePro 2.0.3 (227)

Open this page on the iPhone it was prepared for.

Install

1. Open this page in Safari on the iPhone it was prepared for.
2. Tap Install, then Install again when iOS asks.
3. Wait for the icon to appear on the home screen.
4. Settings → Privacy & Security → Developer Mode → turn on → restart the phone → confirm. The app will refuse to open until you do.
5. Open the app.

The Developer Mode row only appears after this app is installed, so step 4 cannot be done first. There is no "trust the developer" step — that belongs to a different kind of build. This one does not update itself; each new version is a fresh link.