Dive Like is a simple and straight forward app for dive logging.
This app started as a personal checklist, that I created for myself and friends so we never forget any equipment. Now I believe you could benefit from this checklist.
After the checklist is done, you can create a log draft to be completed after the dive. Or you can simply log a dive.
You can take a picture to be attached to your the logged dive. When taking a picture, the app will ask for your location, so it can place a pin on a map for your reference.