It’s good to know where you stand. In this chapter—literally. A mobile app that helps you with that can be priceless: from being able to summon a taxi by just sending your location to the taxi company (useful when leaving drinking establishments in a not entirely verbal state) to finding your way to the family picnic before your cousins get to the marshmallows.
One of my friends laughed uncontrollably when he saw me using my phone as a spirit level to hang a picture on the wall. But, ...