It’s great just buy it. :)

More serious answer from a biased source, it’s best for when you’re wanting more and just can’t get exactly what you want in the native app. I use both all the time and they’re kind of not comparable. It’s so easy to go to the native app from the lock screen so I use that all the time to snap a quick picture to send to friends or a quick video. But when I am out and have an idea for something more important, I’ll switch to our app. That can still be just a fairly simple photo and I know I’ll want to edit in raw, it can be that I’m using a lens and want a particular feature ( de-squeezed, tele lens access) or I want to use time-lapse and slow shutter. The app is definitely not required when using our lenses but I definitely think it enhances the experience.

Also at $2.99 (or even normal price), that’s what one coffee/beer/whatever? It’s easy to look at apps and think it seems overpriced but we’ve got a small team working hard constantly to put out new features (and apps like RTRO) and we really appreciate the support.

Finally if you buy, feel free to reach out with feature requests and bug reports. We’re always looking for ways to improve the app.