PhotoAffix is in beta it's still being developed. It's also open source! https://github.com/afollestad/photo-affix

PhotoAffix allows you to combine photos together in vertical or horizontal orientation to create one single image. A common use case for this is to create multiple device art screenshots of an app and combine them together to make a showcase image.

Icon by Eduardo Pratti. Play Store feature graphic by RB Designs. Thank you for the graphics guys!

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Please don't rate this app badly because features are missing or it doesn't work. It's open source – please report issues to me and contribute if you can.