P: Lightroom iPad/iPhone Device overheats & brightness dims

Yup, I mentioned that was my original workflow. I originally imported photos through Lightroom Classic Desktop and then have it sync the previews to the cloud. But the biggest issue I would face multiple times is that my edits would start being undone when I open Lightroom Classic to have everything synced. But I digress and that is a completely separate issue. I'm hoping Adobe can fix the Lightroom Mobile performance issue soon.

I've got the iPad Pro M2 and have been experiencing this ever since we started Lightroom CC on mobile. I shoot with a Nikon Z9 and editing the raws with the iPad Pro is sluggish. The screen dims every 5-10 min with just simple color corrections. I have to go back to editing on the PC to not experience this.

When I was originally syncing my RAWS through Lightroom Classic for Desktop, the smart previews would just sync to Lightroom CC from my understanding. That workflow was far better in performance than having the ipad try to render full resolution. I highly suggest the developers allow us toggle our library to smart previews only. I personally do not need the orignal file to be rendered real time on the iPad.

The reason I switched to Lightroom CC exclusively was because that at random time when Lightroom Classis would sync with the edits from Lightroom CC, all of the editing would be magically be erased. This was an absolute nightmare to go through.

Btw, I bought a cooling pad for small computers and attached to the back of my iPad, it seems to work...not ideal but yeah, while I switch to another app

Thank you for that tip @Pictorial Alchemist, I will give it a try, Lightroom is such a P in the A, adobe is such a big company and yet can't fix this issue, time so stop giving them money with subscriptions and switch to another editor, more customer oriented.

This actually makes more sense. It's incredible. I've been using Affinity now.
JUST for comparison guys,

 5 photos, 2 hours.
Used up about 17% battery from 100% 

(cloning, healing brushes, liquifying, having 5+ layers, lighting)

I think until then, I'll just have to pick up a few new habits. Sorry, Adobe. 

M1 iPad Pro User. 

here's my suspicion. Lightroom mobile was one of the first adobe apps ported to iOS. They were still hot on Flash and Air. I bet this is an Air app running in emulation. Needs to be rebuilt from the ground up. 

私も同様の現象が発生しています。

Hey Adobe, i have a iphone 14 pro and the moment i open lightroom and lightroom only, after about 5 minutes of starting to edit photos my phone heats up and then dims the screen and runs extremely slow, this doesn't happen with any other app other then, lightroom Mobile and it's really a struggle 

Hardware Limitations

I got lots of issues with Adobe (not a fanboy) and I don't mean to propagate consumerism or gear lust, but if you want to process RAW images quickly without generating as much heat, I'd recommend getting more powerful hardware like the new series M of apple silicon or a newer phone. It's the reality of computing. 

CPUs in computers, macs, laptops, phones, & ipads generate heat when they handle large amounts of data quickly. 

Processing raw images has historically been done on computers with fans and cooling systems to dissipate this heat. They've been known to generate quite a bit of heat in order to keep up with the speed at which creatives manipulate their images or data etc. 

If you refer to recommended system specs for PCs here: 

https://helpx.adobe.com/sg/lightroom-cc/system-requirements.html

You'll realise that older iPhones like the iPhone 7 or XS do not meet the minimum hardware requirements. Importantly in RAM, Processor & GPU. I'd compare it to towing a trailer with a car that's underpowered. You'll use a lot more fuel (battery) and generate a lot more heat, trying to punch above your device's weight. 

Software Limitations/Safeguards 

Further to this issue, Apple has engineered safeguards to prevent thermal runaway from your processor from affecting the lithium ion battery inside your iPhone/iPad (which is highly flammable AND inefficient at higher temperatures). These safeguards lower your screen brightness in an attempt to prevent overheating over a certain temperature. Older logic boards (motherboards) sometimes short circuit with age, generating excess heat. Older batteries are less efficient as well & generate more heat for the same energy expenditure - it's just li-ion battery chemistry. 

Potential Solution

Some mobile gamers who put a big strain on their phones during long gaming sessions have started strapping aftermarket cooling solutions to their phones to prevent this drop in performance & screen brightness. I've tried something like this to prolong the life of my hardware & increase how quickly I can process images. It's a bit of trouble but I think it's well worth it to make sure your phone performs well and its battery lives a long life - they're not cheap. 

I got lots of issues with Adobe (not a fanboy) and I don't mean to propagate consumerism or gear lust, but if you want to process RAW images quickly without generating as much heat, I'd recommend getting more powerful hardware like the new series M of apple silicon or a newer phone. It's the reality of computing. 

I guess we can choose to have the option to be able to cook an egg on our tablet while working in Lightroom, or work in battery saver mode. Because Adobe already has our money and doesn't care about fixing the actual issue. I guess when the subscription runs out it is time to find a better alternative that doesn't turn my tablet into a radiator.