If you're looking for a way to upgrade weapons in Dave the Diver, then you probably haven't unlocked the ability yet. You need to get to a certain point in the story before you can strengthen your weapons, and once you do, the option to upgrade will be added to the Weapon Shop on your phone.
There's an avalanche of systems and activities to keep you busy in Dave the Diver, which has hit one million sales in 10 days. If you're just diving in to see what the fuss is about, our Dave the Diver tips guide will help steer you in the right direction.
