There are only free completely free Camera app with all the features. Below listed top 3 Android camera apps to choose.
A Better Camera
This is a all purpose full featured Android Camera app. This app freely available for download via Google Play Store. Click below link to download this Android camera app for free.
B612 Camera APK
This is the most customizable Android Camera app. There are lots of filters, stickers, beauty effects and more. If you want to unique photos with different look and feel then go for B612 Camera App.
Simple Camera app with all the features. Works mostly on all Android devices. Feel free to try this camera app. Completely free Android camera app that work on all phones.