In France you have the possibility to get tax reductions if you donate for charity or associations.

This app was made to help you calculate how much you can donate using those tax deductions and how much your donation will really cost you.

By simply filling in your reference tax income (Revenu fiscal de référence) and the amount of income tax you paid last year, this will give you the maximum deduction and donation you can have.
You will also be able to choose the amount you want to donate to know how much it will really cost after the tax deductions!

This application has no tracker and doesn't use internet connection.