I've just got the AB Quantum app and I have to say I'm impressed generally but I need Kestrel compatibility because of all the custom gun profiles the I've created using the Kestrel 5700 Elite and the Kestrel Link Ballistics app.
Here's what I posted in the optics section about my thoughts on the Sig Kilo 10K, the Sig BDX app, and the AB Quantum app:
www.snipershide.com
Here's what I posted in the optics section about my thoughts on the Sig Kilo 10K, the Sig BDX app, and the AB Quantum app:

Spotters - Sig Kilo10K Gen 2, AB Quantum app, Sig BDX app first impressions and comments
I just got an Sig Kilo10K Gen 2 and my first impressions of the are very favorable. The past few years I've been using a Leica 3200.com 10x42 except for the Nightforce ELR match when I bring my old trusty Vectronix Terrapin. I use a Kestrell 5700 Elite for my ballistic solutions. I used to have...