Have you ever had somewhere to be but knew that no matter how fast you drove, walked, or ran, you were going to arrive late? A decision presents itself. Do you text the person you are seeing to tell them that you are going to be late? At what point do you need to do that? When expecting a five minute delay, or ten, or twenty?
ETA is a neat little application that uses your location and a pre-set message to make your apologies for you as and when they are needed. Having to text someone to say you will be late only adds time to your already prolonged journey. No matter how good you may think you are at it, texting whilst walking does slow you down. ETA allows you to focus on the walking, and forget about having to need to send an apology message.