One of the first definitions of Controlling states that Control of an undertaking consists of seeing that everything is being carried out in accordance with the plan which has been adopted, the orders which have been given, and the principles which have been laid down. Its object is to point out mistakes in order that they may be rectified and prevented from recurring.
The first principle is taking the accounting of incomes and outcomes is that you need a budget, planning of your revenues and costs. So in this app, you can easily define a quarterly budget and then check the variation of your actual figures from the budget defined. Another important principle to improve your management is that not all flows are equal and it's important to be able to divide them by importance and urgency. After, if you want to optimize your business, you can easily find on which flows you have to act first. And last but not least, never forget the past but consider it to take advantage of your future decisions.