I was going to add my own suggestion, but then saw this idea. I would very much like to see this functionality. My phone (Nexus 4) doesn't work in AR mode very well, so I find myself manually scrolling with my fingers. In all of the AR apps I've tried, I get lost very easy in manual mode when the view twists. Keeping the horizon... well.. horizontal... would greatly improve manual mode for me.
The non-AR sky map embedded in Sky and Telescope's "Sky Week" app does this very well. It's a lot easier to use in manual mode, but it's missing all of the features you have. :)
I was going to add my own suggestion, but then saw this idea. I would very much like to see this functionality. My phone (Nexus 4) doesn't work in AR mode very well, so I find myself manually scrolling with my fingers. In all of the AR apps I've tried, I get lost very easy in manual mode when the view twists. Keeping the horizon... well.. horizontal... would greatly improve manual mode for me.
The non-AR sky map embedded in Sky and Telescope's "Sky Week" app does this very well. It's a lot easier to use in manual mode, but it's missing all of the features you have. :)