I have previously used this app on my android mobile. It is quite good as a tracker for food, weight, exercise and I had the free version, which has some limitations but is still useful.
I was able to log the foods I ate, the exercise I did and link it to my fitness band to record steps.
The only downside was there were too many different versions of foodstuff to choose from, many had been input by users and weren't accurate with their calorie count or composition of carbs, fat, sugar etc.
For a freebie, it was absolutely fine for a beginner like me.