Startup readings, refrigerant recorded properly, and a service history per unit that survives the technician who set it up leaving. $59, once.
Not a generic service form with a notes box at the bottom. The fields are the ones that matter on this job, and the document at the end is the one your customer expects.
Each piece of equipment is its own record — make, model, serial, install date, and everything ever done to it.
Suction, liquid, superheat, subcool, temperature split, static pressure. Numbers with units, the way a real startup sheet looks.
What went in, what came out, how much. Recorded, not remembered.
Interval on the unit, so the reminder comes to you rather than the customer noticing first.
Equipment make, model and serial · readings with units · refrigerant type and amount added or recovered · parts with numbers · findings and recommendations · service interval and next due · technician and certification · customer signature.
It doesn't do Manual J, load calculations or duct sizing. Those run through approved software and an engineer's judgement — Sterling records the result and attaches the document.
Do the whole job offline — photos and all — and it syncs itself when you're back in range.
There's a button inside every work layer that sends me a message. I read all of them myself. When a fix ships because someone told me, it goes in the changelog with a thank-you.