If you are used to processing images at your desktop with an image processor that offers a gazillion options which enable you to enhance your raw images or quite possibly convert them into nightmare renditions of what you originally envisioned when you clicked the shutter then you more than likely have been somewhat disappointed by the great many offerings available for IOS and Android.
Most of what you find available in image processing apps can be pretty limited but there are a few that offer capable processing options. One of these is surprisingly complete and shines on the Ipad Pro for those who want their desktops to appear on their late model Ipad or Ipad Pro tablets and this article by Mr. Carlson explains how this app can provide you with a virtually complete processing option.
Affinity Photo for iPad succeeds where previous iOS software has failed: it provides non-destructive editing but doesn’t feel like a watered down version of the desktop app.
Source: Affinity Photo for iPad Review