I am almost embarrassed to post this here because so much of what is in the Android app is shared code with my desktop NM Collector CP application. However, no matter how it was created, the Android version is now available on Google Play.
One of the best ways to use NM Collector CP is to enter your data using the desktop application and then transfer it to your Android device to take with you wherever you go. Since your Android device has a camera you can easily add images to your items on your Android phone or tablet and then transfer those pictures and any other updates back to your desktop application. I have a blog post describing how to do it.
Currently I just use file explorer to transfer data. Perhaps in the future I will implement a more end-user friendly approach if there is a demand for it.
Thanks