Change the sheets, study for your exams, call grandma in the province – there are so many things you don’t want to do but eventually have to. Now there is an effective way for all lazy bums to remind themselves of what they’ve been putting off.

The Last Time app counts the days from when you last read a book or trimmed your fingernails.

The app helps you fight the serious problem of procrastination – something that students are especially prone to.

How it works: First, you finish a disagreeable task like going to the gym. Then you make a brief note in the app, which starts to count the days it has been since you last went to the gym. The count is a constant reminder that your fat belly needs a workout.

Does it actually help? You will have to find out for yourself. Try it out – but call grandma first.

The app is free and available on iPhone and Android.