Hi,
My name is Hernán, 27 years old and i would like to offer my services to provide you the app. Though i have no big experience in Android, i think i can help you with your project.
First of all, i would initiate the app with a picture of you and your daughters as a splashscreen. Then appears the main screen where you will see the three pictures of them with the balance (here you can choose where to include the number), the plus green button with its number on the left and the minus red button on the right.
Each button adds (or rest) a point to the balance and taggs the date and time. Here we can add an option to include a brief summary of the point (e.g.: plus side, "Get an A in math exam" - 30.09.2016 - 17.00 hs).
Then, touching on each picture you will see the list of positive and negative points (including or not the optional brief summary). On the bottom of the screen you will see the button that deletes all.
The app could be developed whether in english or spanish.
As i anticipated, i have no big experience developing in Android, in fact this would be my first project in Nubelo so i am really excited with the subject. In other words, i am pretty interested in continuing learning and developing so i will make my best and offer much time to make you the best app.
What is more, in case you are not 100% sure of my android knowledge, the professors of the coding school i studied are willing to help me, however please feel confident.
The app will be delivered in 2-3 weeks. Please find attached a basic model of the app.
Yours faithfully,
Hernán