If you want a free and lightweight camera app for you smartphone, Open Camera is the best choice.
It contains a lot of features:
- Option to auto-stabilize;
- Support for focus modes, scene modes, color effects, white balance, ISO, exposure compensation/lock, face detection, torch;
- Video recording (with HD option);
- Handy remote controls: timer (with optional voice countdown), auto-repeat mode (with configurable delay). Option to take photo remotely by making a noise (e.g., voice, whistle), or by voice command “cheese”;
- Zoom via multi-touch gesture and single-touch control;
- Ability to lock orientation to portrait or landscape for photo or video;
- Disable shutter sound;
- Overlay a choice of grids (including “rule of thirds”) and crop guides;
- Apply a date and timestamp, location coordinates, and custom text to photos;
- Support for (some) external microphones;
- Support for Camera2 API: manual focus distance, manual ISO, manual exposure time, RAW (DNG) files;
- Support for HDR and Exposure Bracketing (Camera2 API only);
- Dynamic range optimization mode for better quality photos.
Open Camera might not look like much, given its bare-bones interface, but it’s an awesome app recommend to owners of low and mid-range devices that feel somewhat limited by their stock camera applications.