Hacker's Diet Offline — Open Source Productivity App

The Hacker's Diet, published by John Walker, founder of Autodesk, Inc, and co-author of AutoCAD, as a handy Android app. You can track your weight and excercise and get a weighted moving average of your weight's change over time. The app can be used completely offline, with local backups being created as well. You can also optionally synchronise your weight to the Hacker's Diet Online at https://www.fourmilab.ch/cgi-bin/HackDiet which has additional features like weight gain/loss goals, Trend calculations, graphs over long periods and more.