By Then: Weight calculator

By Then is an iPhone app for calculating your weight gain/loss over a period of time.

Tell the app your current and target weights, and for a given weekly weight change it will calculate when you will reach your target weight.

And if you already know the target date, the app will tell you what weekly weight change will get you there.

By then; What will you weigh?

I built this app because at various times in my life I’ve needed to either gain or lose weight, but I relied on spreadsheets to do the calculations. With By Then it’s easier than ever to calculate, plus with the widgets I can have a homescreen reminder whenever I need it.

And now you can too. If you have a weight journey you need to embark on, let By Then tell you when you’ll get there.

The app is free to download and use, with a one-time unlock purchase for those who want to see the weekly projected weight changes and try the different colour themes.