Rezzize is a free iPhone app developed by La Fappbrica S.A.S. de C.V. that allows users to resize image dimensions and compress file sizes. With the native resizing functions available on your device, the app offers fast processing times.

One of the key features of Rezzize is its native share screen, which allows users to save images into the camera roll, Files app (with renaming capabilities), send them via email, use them in a printer, and more.

The app offers three different modes for resizing images: Aspect Ratio, Stretch, and Crop. With Aspect Ratio, users can resize either the height or width of an image and let the app calculate the other dimension to maintain the same aspect ratio. Stretch allows users to choose any aspect and have the image fill the available space. Crop mode allows users to change the size of an image by cutting or adding space, and they can reposition the image within the available space to their liking.

Rezzize supports three output formats: JPG, HEIC, and PNG. Both JPG and HEIC formats allow users to reduce the output quality and achieve smaller file sizes.

Additionally, Rezzize offers batch processing functionality, allowing users to resize and compress up to 100 images at once. Users can apply general settings to all images or tweak each one individually. Please note that the batch processing feature requires the Pro version of the app.