Phone Number Location Tracker is an iPhone app developed by Marcin Olawski, which allows you to quickly find someone's location by sending them a text message request. It's perfect for those times when someone is lost, running late, or can't explain where they are. The app generates a unique URL that is sent to the person whose location you want to find. If they click on the link, you'll be able to see their location.

The app is easy to use and doesn't require the person whose location you want to find to install any additional apps on their phone. It works with most phones manufactured after 2010 and can be used without any technical knowledge.