Keeping a vehicle log book is a bind. Inland Revenue requires you to note your opening odometer reading and closing odometer reading over a three month period. It will allow you to record your business trips only, over that period. Unfortunately, if you overlook a business trip, it will become a private trip by default. Apps are now coming onto the market to solve the problem. They will keep a track of all your trips and help you to analyse them. We obtained a quote for using LogbookMe. A 12-week license costs $248 + GST and a 52-week license costs $480 + GST. There will be other logbook apps on the Internet. You may be able to put the life book app to other uses to get the best value out of it.