1. Easy to use.
2. Will be FREE forever.
3. Ranking (You can know which car is more fuel saving) Note that Ranking is still in test stage so that uploading function is only available for those users whose language setting is Chinese. We apologize for this inconvenience.
4. You can ask any question in English in our fag page.
If you are willing to help revise the English, please contact with the developer. I deeply appreciate your kindness and help.