Here is how you can share your client's upcoming appointment list:
on Mobile app:
Menu > Client profile > tap on "share upcoming appointments" > Send by message/ email
You can also preview the list appointment before you send out the list.
When your clients received the message, they can click on the link to view the details of all future appointments.
A short screen recording for your reference:
No need to bother your clients to download app, or register account or remember password... Just share the upcoming appointment list through message, eeeeeasy😌😌😌