There are several Apple and Android applications available that support Stop Motion Photography projects. I use stop motion in the classroom to assess student learning by providing PreK-5 learners with a tool they can use to share what they know.
Here are a Few of My Favorites
iMotion iPad App & Lego Story Visualizer
Links are Provided on App Image
Stop Motion Photography Projects
One-to-one Correspondence with Manipulatives
I prefer to use Google Drive on classroom iPads. This allows for easy saving and access to materials. Note: I also love to use Drive on my phone. I snap a photo of something I love or a great idea and I immediately place the image in a folder in my Drive.