I actually built the iOS app to export compressed 10-bit HDR HEIFs from Lightroom Mobile (with Gain Maps!)
Hey everyone,
A week ago, I complained here about the Lightroom Mobile HDR export workflow on iOS.
If your iPhone library is packed with RAW photos—whether you shoot and process ProRAW on your phone, or use your iPad/iPhone on light travel to quickly edit camera RAWs—and you want a quick way to save a super lightweight copy on your device, the solution is finally here!
I’ve struggled with this pain point myself. I compared Lightroom's HDR JPEG XL exports with Mac Photos' full-size HEIF exports. Mac Photos achieves incredible quality at a tiny fraction of the size (compressing 40MB down to just 2MB). But this capability was completely missing on iOS, which is why I spent the last week coding a tool to bring it to iPhone and iPad.
My app, **RAW to HEIC Pro**, is now officially live on the App Store!
How it works:
It integrates directly into your iOS Share Sheet:
Export your HDR TIFF/DNG from Lightroom Mobile.
Share it directly to `RAW to HEIC Pro`.
The app uses a local 10-bit half-float Core Image pipeline to compress the image down to a ~1.8MB HEIF, while perfectly preserving the 10-bit HDR gain map.
When you open it in the Apple Photos app, the highlights still glow natively. Everything is processed 100% locally on your device. No accounts, no ads, no trackers.
To thank this community for the awesome feedback on my last post, **I’m giving away 50 lifetime unlock codes in this thread!**
If you want to try it out and give some feedback, just leave a comment and I'll DM you a lifetime code.
App Store search: **RAW to HEIC Pro**