https://www.dpreview.com/news/4985268136/canon-launches-dpp-express-app-for-ipad
Canon has ported a large chunk of its Digital Photo Professional (DPP) Raw processing software's feature set to mobile and launched the DPP Express app for Apple's iPad.
The new app works in conjunction with Canon's Camera Connect app and offers a wide range of processing functions for Canon .CR3 Raw files and JPEG images. Files can be viewed, adjusted and saved to the cloud, a computer or your camera - all wirelessly.
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The app is compatible with newer iPads and iPad Pro models running iOS 11. For more information on compatibility and features have a look at the Canon website. You can download DPP Express from the iOS App Store.