I can’t remember the last time I used my iMac to edit a photo. All my photo editing happens on the iPad Pro.
The iPad is an ideal tool for perusing and editingyour photos. So, in a sense, picking the best photo editing app for the iPad is actually picking the best photo editing app, period.
Two other personal side-notes about Lightroom:
If you are using Lightroom, you should check out the presets that Rebecca Lily has to offer — they are fantastic. I have sets IV, V, and VI. As a long-time VSCO user, there are several bold and moody presets in Rebecca’s Pro Sets V and VI that I think are great.
Paying a few bucks a month for Lightroom cloud storage syncing and backup is worth the price alone to have a second layer of cloud backup for my entire Lightroom catalog.