Both my husband and I use the Digit app. For swipe happy people like us, $3 here, and $5 there add up. Basically Digit takes several "little" amounts from your account, and before long you realize that they add up. For instance, it took $1.72 yesterday and $5.62 two days ago. The amounts vary based on expected bills and the balance of your account. You can tell Digit to stop for a period if you need to (I made Digit stop for a week until my checks for camp cleared, I didn't want Digit seeing a huge balance and not anticipating any bills so I let it know to hold off for a week). After a few months we both have several hundred dollars in our digit accounts to use for spending money, and we didn't even feel it. Digit gets use to the type of spending you do, the bills you pay etc. and guarantees no over draft fees. The interest rate sucks, but it is better than saving it in a coffee tin (both interest wise and it reduces the chances of me dipping into it). I get alerts everyday on my checking balance, but my husband doesn't get them as frequent as he changed his settings. To withdraw the money, all you have to do is text "withdraw" and within 2 days you have the money you saved. We now have about $1K with us to pay for character meals, travel expenses (we are driving) and whatever else for our family of 4.