the app dazz cam is reaaaally good, i dunno if its on android, i use it on ios.
about the camera u know what, using one of those bootleg gopro cameras from amazon can cost u like 10$ w great results and the wonky lens effect gives it an extra touch. i customized mine and it looks really cute w stickers inside the plastic case it brings , also i love the pics it takes. no flash tho, but i just turn my phone flash and thats it-
u can also go to any thrift stores, charity shops or flea market. specially in the latest, there usually are a lot of old digicams around, just make sure it works right there. some used to work with AA batteries so u can carry a few to test them right there. and a SD card, (:
heres some pics i took w the gopro. video looks similar :