I have an existing android home budgeting app. The app involves a large amount of calculations and requires the user to input a lot of data. At the moment, all the calculations are correct and the app functions acceptably in the short term. However, it tends to crash if left open for several hours, it is also slow to recalculate, the chart is cumbersome and it has to be uninstalled and reinstalled to upgrade to a new version. I am looking for an experienced coder to review and make changes to the app to overcome these limitations.