You can count logs with your smartphone instead of using field notes. Tap the diameter of the end to count, and if you make a mistake, tap the (-)-to lower the count. It even works for logs longer than 6 meters. Currently, there is no data saving function, so if necessary, please send results to a memo pad app that can share data. You can count and add up quickly without taking a pen in and out of your pocket. After inputting, you can send the data to an office or client by email or social media immediately!