KeepTrack is great in it's free basic plan but you can get much more by subscribing to the pro plan.

Unlimited parameters

The basic plan is limited by default to 10 parameters. Need more? get the pro! With the pro version all limits on the app are removed and you get add as many parameters as you like. 

Widgets

Nothing helps tracking something better than seeing it in front of you. Use our widget to place your most important parameters right on your home screen.
The widget also works as a quick way to input new entries or access your parameter's data.

Goals

Collecting all this data is one of the best tools to reach your goals and our our Our goal management feature lets you define a goal for each of your parameters.
Set a target to reach which could be an aggregation over a period of time and track its progress on a dedicated screen and in the graphs.