ProximiT is a real-time personal assistant for all your bus and subway needs in and around Boston. Developed by Jeff Lopes, this travel and navigation app is perfect for those who want to save time and money while getting around the city.

The app provides you with real-time arrival times for your favorite stations as you approach them, without even opening the app. You can see down to the second predictions, so you'll know exactly when to rush or take your time and get a cup of coffee. Additionally, you can locate nearby stations in a new part of town, and they are sorted by distance and show upcoming arrival times, so you can decide which is your best bet.

ProximiT also keeps you updated about service alerts such as delays, construction, and elevator outages. The app is easy to use and helps you plan your commute better. However, it's worth noting that continued use of GPS running in the background can dramatically decrease battery life.

Overall, ProximiT is a great app for anyone traveling around Boston. It's not affiliated with the MBTA, but it's an excellent tool to have on hand to make sure you never miss a bus or train again.