No freaking way this is worth $10/mo, especially when creating your own by embedding your Google Calendar in a web page (or in the case of my example, a Google Site page) and sharing the link is free.
I've included a link to that in my email signature for the last couple of years to solve specifically this problem and it works great. It's not particularly beautiful, but it solved the problem. There are a plethora of other apps providing the same service (here's one: http://www.scheduleonce.com/pricing), so you're going to have to differentiate yourself somehow.
No freaking way this is worth $10/mo, especially when creating your own by embedding your Google Calendar in a web page (or in the case of my example, a Google Site page) and sharing the link is free.
The link you provided doesn't accomplish the same thing as their product.
Your link is just a read-only view of your calendar (unless I've missed something). The real utility comes when people can actually schedule something on your calendar without your help.
I've been wishing for exactly this recently, and am excited to try the app.
Also, since I'd use this for work (saving me real time) on a company credit card, $10/month is without question a completely negligible amount.
In summary: I disagree with everything you've said. :)
No kidding. Besides that, the people scheduling the appointment will probably want to schedule it from their calendar, not some third party app. The most valuable use case is determining when someone is available, not creating the appointment.
I think $10 a month is fine. Those who value this service wont change their mind because of a few bucks.
Remember - people who will use this service will probably do it for business, they wont be teenagers, and a $10 will be nothing if the service provides any type of value at all.
I'd have liked to see some sort of screenshot tour (or a product video as there is presumably a real-time component) before signing in - there's very little detail available, which might be good for conversion, but it meant I didn't click the button.
(When I did, I was given a "sign in with Google" chooser - did you consider telling people what is going to happen before they do that? It might seem obvious, but it might put people off too.)
Also, have you considered per-domain pricing? With the demise of Appointment Slots, this could be something you could sell to a Google Apps for Business customer for all their users.
I'd suggest dropping the requirement for payment info in order to start the free trial.
I was going to try it out on my calendar - with a colleague in mind. I don't schedule enough appointments to make it worth it to me, and I'm not really interested in giving you my CC details just to test it for someone else.
At the very least, you should make the demo link easier to find.
As a Google Calendar user, I'm used to being able to drag down on a time period to book an event, and then enter event details. I can't do that on your demo.
That seems really interesting, however a working demo would be great, especially because you are asking the credit card before anything else (not saying it's bad, just that I'm not comfortable with giving my payment information after one screenshot only)
As another commenter noted, your site doesn't really give much away, I too would need to see screenshots or a product video.
Also when I click on the Pricing link at the top it's not immediately obvious I just jumped past your product feature blurb to a #anchor. It says "All this for only $10 a month. Checkmate." and I thought, "All what?", then realised I needed to scroll up.
I have this pain point. I was hoping for API docs and a live chat or contact us section...
In my case, I'd like to allow customer service candidates who have passed initial skills test screeners to be prompted to select a primary and secondary scheduling slot and have those selections pushed to gcal.
https://sites.google.com/site/elliottally/
I've included a link to that in my email signature for the last couple of years to solve specifically this problem and it works great. It's not particularly beautiful, but it solved the problem. There are a plethora of other apps providing the same service (here's one: http://www.scheduleonce.com/pricing), so you're going to have to differentiate yourself somehow.
You really need a free tier.