I love the AB focus pulls. However, I don’t know if it’s my Sigma 18-35 or the app but most of the time the focus pull is far from accurate. Set a good A or B point, then hit the play to focus and it is way out of focus. But then sometimes it works.
Also, the lidar reports wildly different distances (iphone 13 pro max.). Ill focus on something 6 meters away, focus on something closer then go back to the 6 meters and it’ll say it’s 1.5 meters or 8 meters or 4 meters. This is pointing at a focus sheet.
The AB pull might be worth it if you have time to set it up several times in order for it to start working correctly. The one remaining issue is that the pull is instant. There is no option for a slow, cinematic pull.
The tech in this app has some promise but right now it’s not worth the purchase price or, really, free.