Trig locks and iOS apps, best results?

Now that i can get midi reliably i/o of my iPad to OT, i’m wondering what your best results have been with different iOS synthesizers and trig locks?

Anyone able to trig-lock patch-change per-step on an iOS synth and get good results?

my current go to iOS synth is DIXIE, an FM type synth, i haven’t been able to figure out how to change pattern/bank yet, finding documentation for some apps is not the greatest, LoL