Apps
There are many different Apps to be used with handheld devices such as smart phone and PDAs. Working with App developers you can collect exactly what you need, or you can use one of the many options out there. Some companies offer free apps that do the basics, and offer options to upgrade for more functionality. If you think you want to use an App make sure you know exactly what you want to get out of it, and think getting one that can do everything you want, and more in case you suddenly have the ability to collect more information than you expected.
I-Tree application
I-Tree application