This app was mentioned in 5 comments, with an average of 1.20 upvotes
Heres the Google Play store equivalent: https://play.google.com/store/apps/details?id=com.hogdex.TtcRider&hl=en_CA
I use the app all the time and although it saves minutes, they really add up! It's simple and intuitive, and even has a fun fact about each station!
Just a note that there is an Android app available that helps with this.
Handy to have installed on your phone since it works offline.
https://play.google.com/store/apps/details?id=com.hogdex.TtcRider
I love the TTC efficiency app
I made the Android app https://play.google.com/store/apps/details?id=com.hogdex.TtcRider
And other Toronto-ific stuff http://www.hogdex.com