This app was mentioned in 3 comments, with an average of 1.33 upvotes
i use Call Levels to monitor my investments. they will send notifications when price levels are triggered. quite easy to use.
My Budget Book is good too although it's paid app.
Call Levels sounds like it could work. It is free and it doesn't require an account. https://play.google.com/store/apps/details?id=com.calllevelsapp or https://itunes.apple.com/sg/app/call-levels-free-simple-time/id937109871?mt=8
an article on the app http://www.forbes.com/sites/edmundingham/2016/03/15/fintech-firm-call-levels-making-sure-buy-low-sell-high-gets-the-24-hour-treatment/#2e8ecf87181a