Android App Modification + Reskin

Hello, I'm looking to develop an app similar to "Power of Stocks" (available on Google Play). You can download and view the source code of the app for better understanding. I am majorly looking for the following features.. 1. Sign up using email and mobile number (mobile has to be verified using OTP) 2. In app purchase of video course using a payment gateway link 3. Once purchase confirmed, the video will be accessible to the buyer for a period of 60 days. 4. The purchase will be locked to the mobile hardware ID, so no other mobile device can play the course video 5. Course video will automatically be removed from users account after 60 days. 6. Dynamic watermark will run on videos (name of customer, mobile number and IP address) - please check the candlestick video on Power of stocks app to understand this). 7. Send customized push notifications. I believe, since we can get the source code from power of stocks app itself, all we need to do is re skin it, modify some codes to integrate our payment gateway method, video source, backend settings, etc. The above ones are the priority ones and on the top of my list. Few more changes, minor ones though, might be here and there during the course of development. I truly expect the freelancers to read the whole description before applying to the job. If you have read the whole description and wish to apply for the job, please write "I love Android 98610" on the top of your response. Job posts without the above note will not be taken into account. Thanks