Open Camera is a completely free Camera app. Features:
* Expose your camera’s functionality: support for scene modes, color effects, white balance, ISO, exposure compensation/lock, selfie with “screen flash”, HD video and more.
* Handy remote controls: timer (with optional voice countdown), auto-repeat mode (with configurable delay).
* Option to take photo remotely by making a noise.
* Configurable volume keys and user interface.
* Upside-down preview option for use with attachable lenses.
* Noise reduction (including low light night mode) and Dynamic range optimisation modes.
* Options for on-screen histogram, zebra stripes, focus peaking.
* Focus bracketing mode.
* Completely free, and no third party ads in the app (I only run third party ads on the website). Open Source.