Sure it's easier to spend with a a wristband. But i could imagine some smartwatch app(or phone app), that really helps you control spending, even better than c

Sure it's easier to spend with a a wristband. But i could imagine some smartwatch app(or phone app), that really helps you control spending, even better than cash. For example, an app that has a list of things you really really want to buy, and whenever you are about to pay for a an impulse buy, you're shown that list, and asked if you prefer to save towards that.