Saving Cents Everyone who has ever wanted to save money over all usually follows a very simple tried and true formula which is to track your spending, make a budget, and then find ways to stay with in that budget by making small changes, Since the days of pen and paper to apps, the system remains the same. One way of tracking spending for free is with the Spending Tracker app that you can find for free on Google Play. The free version is nice, but it plays ads and limits how many categories you can use. I have used the premium version for a while, but I never paid for it. I earned money via Google Opinion Rewards by filling out surveys and uploading reciepts. To date, I have earned almost $100 from the Google Opinion Rewards app which I have used for various premium apps.