In search of a do it all app/software management : suggestions and why ?

I am looking into medical spa software that has the most bang for a buck. I currently have FULL SLATE

and am very happy with it , integrates well with google calender for appointments and is great for clients, zero email marketing capabilities. and seems to be booking software unless you want to add certificate purchase on-line which is extra $ ,i can also not find any place for SOAP notes, and how secure would that be ?

. I was using SOAP VAULT for soap notes,which is HIPPA approved and so secure.  they also have a built in scheduler , but it is not user friendly. 

A friend uses VAGARO, with much success, but has a spa  verses the medical massage business I have. 

Any Guidance would be appreciated . I am looking to stay at the $28 a month price mark.