Pick your material and thickness below for tungsten type/size, amperage, and gas - plus when to switch on pulse. Works for mild steel, stainless, and aluminum.
Starting points for DC on steel/stainless and AC on aluminum, standard tungsten ground to a point. Always fine-tune on scrap - your machine, polarity, and cup size all shift these numbers.
DCEN (electrode negative) for steel and stainless - it puts most of the heat into the workpiece. AC for aluminum and magnesium - it breaks up the oxide layer on every cycle so the arc doesn't wander.
Thoriated (red) or lanthanated (gold) for DC steel and stainless work. Pure (green) or zirconiated (white/brown) for AC aluminum on transformer machines - though lanthanated also runs fine on modern AC inverters.
Pulse cycles between a high peak amperage and a lower background amperage, letting the puddle cool between pulses. That cuts heat input and warping - especially useful on thin stainless and aluminum.
Most welders prefer a foot pedal over fixed amperage because you can taper down at the end of a weld or react to a changing gap in real time, without stopping to adjust the machine.
The app's full TIG settings tool includes pulse frequency and percentage recommendations for thin stainless, aluminum, and titanium - not just amperage. It works offline, so it's there when you're under a hood with no signal.