This homemade app does not require any permission, pls feel safe to use. It has kept running for 5 years since early 2013, and it will continue to run. I know many of you are still using this app, and I would like to say 'thank you'. During 5 years, a lot of issues happened, and the most critical one was Yahoo stopped providing it's data api and charts, which made this app un-usable in the second half of year 2017. In order to make it work again, in the end of Year 2017, I rent a server