If you are the type of person who likes keeping track of things in your life, then WhenDidI is the app for you. You can log pretty much anything you want with WhenDidI, whether it be the last time you had a haircut, when you walked the dog, how much you have been spending on lunch, Petrol expenditure, etc. If you can measure or track it, then it can be inserted and recorded in WhenDidI.
On a diet and keeping track of how many calories you have been eating? Want to keep track of how much you have been walking every Day? Want to keep track of your sleeping habits, check out WhenDidI!
WhenDidI is fully customisable, and include graphing functionality, a modern UI (ICS Style) and a number of handy widgets. All in all, if you are the type of person who likes keeping a good record of life, then WhenDidI is the app for you.
In the words of the developer:
Keep a log of all your important events with this fully customizable app.