I would pay for one app&#x2F;service that does 80% of what all other apps&#x2F;services do.<p>One app which I can use to sell things, buy things, send messages, review things, control things, get notifications, track my health, learn things, etc.<p>This doesn&#x27;t seem like something that would be too hard to do, considering that all apps pretty much do the same things. But that would make people&#x27;s life so much better.