iRAW is a manual and automatic camera app. It has two modes of operation, one for newer iOS devices that support RAW photography, and one for previous iOS devices that did not.

On newer devices (like the iPhone SE and 7), all photos are stored in DNG (digital negative) RAW format, which if correctly processed can result in very nice photographs.

On less current devices (like the iPhone 5s and 6), photos are stored in lossless, compressed TIFF format, which is better than JPEG.

On all iPhones the front camera provides TIFF images, not DNG.

iOS devices that support RAW require about 15 MB per DNG file, whereas TIFFs are larger.

iRAW lets you upload photos to DropBox or send them as email attachments.

When running on older devices iRAW has more features including digital zoom and color filters. I'm in the process of adding these features to iRAW for newer iOS devices, too.

In manual mode, iRAW provides sliders to control shutter speed and ISO. There is an optional 2-second delay.

There is a live histogram to help you take better photos.

There is a live level in landscape mode to help you take perfectly horizontal shots, and it can be calibrated from the menu.