App crashing due to memory pressure on iPhone 13.. but works fine on iPhone 12, iPhone 11

I have a camera app that has some intensive processing. Each photo can require between 300-500MB of memory to process all the CIFilters, depth blur etc.

This has been working fine on my older test devices, iPhone 11 & 12, but I had some crash reports from users and I noticed that they were always iPhone 13 / 13 mini users. After purchasing a 13, I can confirm that after taking 2-3 photos sequentially the app crashes due to memory usage.

What I don't understand is that I can take many photos sequentially on the iPhone 11 / 12 and they do not crash. The memory usage is certainly high, but all the images save and the app does not crash. Here's what the memory usage looks like when using the iPhone 11:

All the devices have 4GB of RAM, so why should the iPhone 13 not be able to handle it? One option would be to try and reduce the memory usage of the application, but it's a challenge when processing 12MP images. Here's what the memory debugger looks like, not very useful!

Any pointers greatly appreciated! Alex

App crashing due to memory pressure on iPhone 13.. but works fine on iPhone 12, iPhone 11
 
 
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