Syncing Appointments+ with IOS

Currently I use Acuity Scheduler, but would love to switch to Appointments+ if it can do what I want, as it's so much more accessible. Currently, when a client schedules an appointment through Acuity Scheduler, this appointment comes up on my IOS calendar, which is the only calendar I use. Also, if there's something on my IOS calendar, that time is also blocked out on Acuity. Is there any way to replicate this functionality with Appointments+ without being forced to used Google Calendar?