To have a solid budget for a month helps us greatly to spend money evenly and reasonably
It's definitely rational to take money out from a set budget than to throw it away and realise that there's no more in the half of the month.
Seeing how much and on what I spend money would help me a lot
1. Decision
2. Discussion
3. Agreement
4. Planning
Using Prototype On Paper allowed me to quickly prototype the key interaction from the concept – dialogue between the both sides of a couple on how much money they will invest in their relationship.