PPI defines the print quality of the photo, often called ‘Image Resolution‘. PPI, Pixel Per Inch, means how many pixels will be printed on each inch of paper.
The more pixels is the better for printing in quality. When you print a photo to a Letter size paper with recommended 300 ppi, the file size must be at least 19.4 MB 2250 pixels x 3000 pixels. However, this is not always necessary when you print to a big size wall art with the Image Splitter that you enjoy in distance. 75 PPI may be enough.
Image Splitter App displays the estimated PPI on the bottom of the preview.
PPI is calculated based on the image that fits in the ‘Target Photo Size’. When Original Photo Size is in high resolution, PPI is high. When you zoom in, PPI decreases.