Megapix is an in-development photography app designed to take naturalistic photos with greatly reduced post-processing while saving them in HEIC format. Below is a cropped sample comparing the result from the built-in Camera app vs Megapix.
The above example is done by taking a photo in 48-megapixel ProRAW and converting it to HEIC, which is relatively straightforward.
Where things really get interesting is on iPhones (and iPads) that don’t support ProRAW. More on that… eventually.