So you want to track birds and other objects from a distance on your smartphone? Space Navigator App-Enhanced Binoculars have you covered. They allow you to use your smartphone to watch nature, the moon, and objects in the sky. The smartphone mount expands from 2.25″ to 3.5″ to fit most smartphones.
These binoculars are lightweight and compact. They feature 7x 50mm coated optical glass lenses. They are compatible with iOS and Android devices. Sets you back under $40 at this time.