Should I install it myself or hire a locksmith?

If you are replacing a standard single-cylinder deadbolt on a common hinged door, most people can do it with a screwdriver in 20–40 minutes by following the template. Take your time aligning the bolt so the door does not bind, and test the mechanical key and manual operation before relying on the app. Call a locksmith if your door has a mortice lock, a multi-point system, an unusual thickness, or if you are cutting a new bore — those jobs need the right tools and experience to avoid damaging the door.