Mobile Photoshop is nifty af, but mobile LR is just nasty. So is the "new" Lightroom, which is all cloud and shit, with the emphasis on "shit".
Wise people use LR Classic on the desktop (which, in recent releases, just seems to have become MUCH more performant - finally exercising the fancy-pants GPU I've got, for example) because it's much nicer, notwithstanding its pants-on-head approach to catalogue upgrades (you get a new catalogue every time a new version comes out - not a massive issue if you just have one catalogue, but I have about ten).
ETA: The ridiculous approach to catalogue upgrades, for the no people who are interested:
Wise people use LR Classic on the desktop (which, in recent releases, just seems to have become MUCH more performant - finally exercising the fancy-pants GPU I've got, for example) because it's much nicer, notwithstanding its pants-on-head approach to catalogue upgrades (you get a new catalogue every time a new version comes out - not a massive issue if you just have one catalogue, but I have about ten).
ETA: The ridiculous approach to catalogue upgrades, for the no people who are interested:
- You have LR v1.0, and a catalogue called, say, "Record Shots.lrcat"
- You upgrade to LR v2.0. Your catalogue needs to be upgraded. LR does this, and now you have two catalogue files: "Record Shots.lrcat" (v1.0) and "Record Shots-2.lrcat" (v2.0)
- This goes on and on, for each catalogue that you have. So if you thought you'd be Mr P Whysall Esq., Organised Photographer Extraordinaire, and have a link to your catalogue files on your desktop (e.g. here's your record shots, here's that client, here's this event, etc.), well. Adobe would like you to know that you can go fuck yourself, and also that you can inadvertently upgrade the same old catalogue file multiple times ("Record Shots-3.lrcat", etc; no check is made whether you have already upgraded this catalogue), leading to situations where you need to do some extraordinary farting about to merge changes from multiple instances of catalogue files, made even more fucktastically difficult by the fact that Lightroom absolutely will not open more than one catalogue file at a time, and running multiple instances of Lightroom can generate behaviour charitably described as "undefined".
- One reason this is so obnoxious is that in the same directory as the .lrcat file, Lightroom creates a bunch of other files and directories, and they're not pretty.
- Also there are strong reasons to work with separate catalogues, to do with presets and stuff you might want to do to all images in the catalogue, such as metadata wankery.