In order to get a client to download your app it needs to provide value to them on an ongoing bases. Telling them who you are and what you have to offer like people do on their website doesn't cut it. 

What you need is an “ethical bribe”.
A gift of information that is of value to your client is one kind of ethical bribe.

The information I've shared on lower back pain is yours to use in whole or in part as an ethical bribe to reward your customers for downloading your app. It's yours for free regardless of our future dealings togeather. 

You can use this information in any number of ways. Use it all at once as I have here or use it as part of a drip down campaign. Use the content to script some videos and include them in your app. 

While discounting prices and putting on sales takes away from the value of your services an ethical bribe like this adds value.