You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
Most investment experts say you should keep a cash reserve equal to sustaining you 1 to 2 years. I look at the $50 as a cash reserve. It may get 0% interest, but that is not much less than the bank gives on savings or CDs.