There is nothing to download, on any device just go to app.one.site in a web browser and follow the on-screen prompts. It’s really that simple.
Just go to app.one.site and click forgotten password, as if by magic an email will appear for you to reset your password.
You mean you forgot 4 digits? It must be a Monday morning...log into your account and navigate to your profile from the top left find the site access pin where you can update it there.
Sometimes it ends up in the junk, if it’s not there drop us a message and we’ll have a look.