Litrato is an app for editing photos and saving those changes to the gallery.

Filters and effects:

• 14 presets to quickly apply a filter (without any parameters).
• Transformations such as rotation, crop, flip...
• Essentials tools such as luminosity, contrast, gamma, saturation...
• More advanced filters that use convolution or blending two or more images.
• Almost all filters are using RenderScript, which accelerates the calculations.

User interface:

• The UI is simple and intuitive, with menus, separate interfaces, and the preview of each filter.
• Dark and light theme.
• Zoom and scroll: it is possible to zoom on the image using two fingers or with a double tap, and then move around with one finger.

Tools:

• “Color Picker”, a tool to select a hue directly from the image.
• "History" gives the user the ability to revert to any prior state of the image.
• A setting menu where the user can tweak some parameters. Those values are saved on the phone.
• An menu to view most EXIF values of the image, such as the ISO, f-number or where the photo was taken.
• Ability to only apply a filter to a part of the image. This "mask" is drawn by the user using its finger.

Load and save:

• Take or select an image: images can be obtained from the gallery, or directly from the camera.
• It is possible to save the image in its original resolution, and have a smaller resolution while using the app.

An extensive description can be found in the project’s Readme.

Anti-Features:

• ApplicationDebuggable: APK files of this application are compiled for debugging („application-debuggable“). For details, see e.g. What are the security implications of using an app built “for debug”.
• NonFreeComp (the application includes non-free components):
  ⇒ contains libraries of Google Mobile Services and Google Maps
• NonFreeNet (this application promotes/depends a non-Free network service):
  ⇒ connects to Google servers (Maps)