I've been invited to test ReceiptWave. What do I do?

We're inviting a few people to try new features in the ReceiptWave app before launch. Your invitation email has one button. Tap it, get the test app, and sign in with the same email address.

1. Open the invitation email, ideally on your phone, and tap Accept the invitation.
2. On the page that opens, tap Accept the invitation again, then Get the test app on iPhone or Get the test app on Android. On an iPhone this opens TestFlight, Apple's free app for test versions.
3. Open ReceiptWave and sign in with the email address the invitation came to, using the emailed link or code.
4. That's it. The test features switch on as soon as you've signed in, until the date in your invitation.