Using the latest technology, RFinder can help you to find repeaters all over the world based on your current location or a specified location. You can filter the search by sorting by distance or band and radius in miles or kilometers.

With this, you can let other hams know you are on a repeater. Find an EchoLink node in RFinder and call it with one click via EchoLink. You will get updates in real time. 

Please note that this app requires a subscription to the RFinder Worldwide Repeater Directory, but you can try it out first as it has a 30-day free trial subscription.