If you're looking for a versatile and completely free camera app, Open Camera is your go-to choice. This powerful app is designed to enhance your photography experience with a wide array of features that cater to both beginners and seasoned photographers.

One of the standout features of Open Camera is its auto-leveling option, ensuring that your pictures are perfectly level regardless of the angle at which you're shooting. Dive deeper into your camera's capabilities with support for various scene modes, color effects, white balance adjustments, ISO settings, exposure compensation and lock, selfie enhancements with "screen flash", and even HD video recording.

Open Camera also offers practical remote control options, including a timer with an optional voice countdown and an auto-repeat mode with a configurable delay. You can also take photos remotely just by making a noise, adding a fun and interactive element to your photography.

Customize your experience further with configurable volume keys and a user-friendly interface. If you use attachable lenses, the upside-down preview option is particularly useful. For those who value composition, overlay grids and crop guides are available to help you frame your shots perfectly.

Geotagging enthusiasts will appreciate the option to tag photos and videos with GPS location data, which includes compass direction for photos. You can also add date and timestamps, location coordinates, and custom text to your photos, and store date/time and location as video subtitles in .SRT format.

For privacy-conscious users, there's an option to remove device exif metadata from your photos. Open Camera also supports advanced photography techniques like panorama shooting (including with the front camera), HDR with auto-alignment and ghost removal, and Exposure Bracketing.

The app leverages the Camera2 API, offering manual controls with optional focus assist, burst mode, RAW (DNG) file support, camera vendor extensions, slow motion video, and log profile video. Enhance your images further with noise reduction features, including a low light night mode, and dynamic range optimization modes.

Visual aids such as on-screen histograms, zebra stripes, and focus peaking are available to help you fine-tune your shots. For those interested in focus stacking, the focus bracketing mode is a valuable addition.

What's more, Open Camera is completely free and devoid of third-party ads within the app itself (ads are only on the website). Being open-source, it offers transparency and the potential for community contributions.

Please note that some features may not be available on all devices due to hardware or camera capabilities, or the Android version you're using. Before relying on Open Camera for important events like a wedding, it's advisable to test it thoroughly on your device.

For more information and to access the source code, visit http://opencamera.org.uk/. The app icon is designed by Adam Lapinski, and Open Camera uses content under third-party licenses, details of which can be found at https://opencamera.org.uk/#licence.