Jobber covers the general field-service basics well: scheduling, quotes, invoicing, client hub. Refrigeration contractors hit its ceiling fast — there is nowhere to log refrigerant added or recovered per unit, no commission-based payroll, and no design tool for the cold rooms you build and quote.
Jobber is fine for lawn care and light residential trades. A refrigeration shop needs compliance records, per-unit history and cold room design — that gap is why Low Temp Desk exists.
Custom fields store text; they cannot produce a refrigerant compliance report, deduct truck stock, compute commissions or render a cold room drawing. Those are workflows, not fields.
Yes, via CSV during onboarding — clients, equipment and labor codes.