MAGNIFYING GLASS

If you’ve ever misplaced your reading glasses, your phone can save the day. If you have an iPhone, turn on Magnifier (go to settings/general/accessibility); on an Android, download the free Magnificent Magnifier app to zoom in on menus or pill bottles. Jack Noftsger of marketing company Content Harmony does this to magnify small-print labels in tough spots like low store shelves. “It’s less strain on my back to bend down to take a photo and stand up to study the text.”

Use the camera on selfie mode to see if there’s hair dye in your ear or a rash on your neck.