Throwing in my 2cents here. When gauging any 'free' software for your practice and software in general - it's important to ask if there are any additional costs outside of the monthly subscription e.g. SMS credits (if you want to use SMS reminders), online bookings, how much each additional user costs etc...

Get the full price so you know the full picture :-).

With Nookal, I am to keep the pricing as up front as possible with pricing directly on our site - Pricing - Nookal. The only additional cost is for SMS credits.