Onda is a free Android application developed by Mr. Luo in the Utilities & Tools category. It provides users with a wide range of features for entertainment and photo editing purposes.

The app allows users to take pictures through the camera and obtain images directly. Additionally, it supports selecting pictures from the photo album and images from files, enabling users to access their images easily. Onda also offers batch image selection, allowing users to conveniently work with multiple images at once.

One of the key features of Onda is its image compression and batch image compression capabilities. Users can compress their images to reduce file size without compromising on quality. The app also supports image cropping and batch image cropping, enabling users to crop their images to their desired dimensions.

Onda provides automatic correction of photo rotation angle, ensuring that images are displayed correctly regardless of their original orientation. The app also offers automatic permission management, eliminating the need for users to worry about granting permissions related to the SD card and camera.

Users can personalize the cropping and compression parameters according to their preferences. Onda also includes a built-in cropping tool as an optional feature. The app supports intelligent selection and crop exception handling, making it easier for users to select and crop their images accurately.

Furthermore, Onda supports automatic recovery after the photo activity is recycled, ensuring that users can resume their editing tasks seamlessly. The app is compatible with Android 8.1 and supports multiple compression tools as well as multiple image selection tools.

With its comprehensive set of features, Onda is a versatile app that caters to users' entertainment and photo editing needs on the Android platform.