Having tried the other contenders (H/F Engage and CK) I have happily settled on PDT. It's stable, well thought-out, flexible, easy to use, tracks all the most important values.

Ease of use and not having to traverse numerous screens is important: the straightforward and intelligent way PDT allows you to log your food and exercise is actually an incentive.

Such features as duplicating, intelligent guesses and simplicity of adding your own food etc make it a pleasure to track results.

Nor does it have the more arcane values that perhaps only a doctor or specialist would want.

Perfect for the every day enthusiast. Will tell you all that matters. Well priced and recommended.