Android
You're inside WhatsApp's browser — the button below jumps you to real Chrome (sign-in only works there).
Open the portal in Chrome
1
Sign in with the email your invite was sent to (Continue with Google).
2
Tap the Install banner inside the app — or Chrome's ⋮ menu → Install and create shortcut.
3
Done — open Crème ERP from your home screen from now on.
iPhone
You're inside WhatsApp's browser. Tap ⋯ (bottom-right) and choose Open in Safari first — installing only works from Safari.
Open the portal
1
Make sure you're in Safari (not the WhatsApp browser).
2
Sign in with the email your invite was sent to.
3
Tap the Share button ⎋ (square with the up-arrow) → Add to Home Screen → Add.
4
Done — open Crème ERP from your home screen from now on.
Sign in with the same email address your invite was sent to.
Problems? Message Ken on WhatsApp.