World Moto Inc. (fka FARE)

[Cueva]

Auto Meter also works for Donkeys, Elephants, etc....

Another advantage of portability is the ability of the meter to be used for non vehicular modes of transport such as when carried by humans or other living creatures. The gate associated with an animal is typically uniform for a given animal and acceleration imparted by the step of that animal, and this input can be used to estimate the distance travelled in such circumstances where the meter has been properly calibrated. This can be used for metering fares involving walking for errand services or transport over extremely difficult terrain in remote areas where even motorcycles are impractical.

http://www.google.im/patents/US20130006722