Local Lens returns photos/videos to you based on their distance from you, there are no ads and I dont track your location unless you are using the app.
You can post anonymously or under a username.
Use it to catalogue your favorite climbing spot, create a timeline of snowpack in the backcountry, keep in touch with other hikers regardless of if you remembered to trade contact info, and in the city socialize with people in your vicinity, show off your work, advertise your local business, buy and sell your stuff, or broadcast anything you think is important to your community.