This How-to is geared toward people with only one smart phone. We use MiRally on all our events which requires a cellular device. If you team has only one this system will be of interest. Jogularity rallies were invented for people with cars with poor or no odometer. A number of references along the course are given to keep you on time. These references specify the time it takes to get there from the start of the jogularity. Get a cheap stopwatch (you can find them for under $10) and start it at you departure time for the jogularity.
Old/Richta way
Drive the course at the prescribed speed. As you pass a reference, split the stopwatch to see how early or late you are. Speed up or slow down as needed to stay on time. It's easy and with practice you will be able to achieve pretty good scores. The Richta app has a clock you can use to gauge your time.
Rabbit Way
If mileages and times are given for eacht point you can enter them in, using the Stage editor in Rabbit 2. This will help you stay on time. Be sure your ideal time display is at 0 when you go by the timing point.