Could be a good app but the ability to save settings in admin is broken - the support team didn't seem to be aware of this nor do they seem to have dedicated developers to fix it. I can't recommend this app developer.
Their proprietary counter is giving false numbers on the amount of shares. This can be shown from the website replays (I'm not seeing even half of the people clicking the button). Other than that, the button works just fine and does its job.
Thanks for your review, apologies for any share count error you have encountered. We'd be happy to look into this more deeply, please send us an email at firstname.lastname@example.org and we'll try to reproduce your issue and get to the bottom of it.