One plan. Everything included.
$0forever
No subscription. No trial timer. No locked features.
- All 30+ calculators — compressor, HVAC, electrical
- Sir Pumps-A-Lot AI assistant (free sign-in)
- Guided troubleshooting & diagnostics
- Service guides, NEC reference, glossaries
- Unlimited field logs & invoicing
- Offline mode after first visit
- No ads. Ever.
From the founder
I build AirCompDX myself, between service calls. It's 100% free — no subscription, no paywall, no ads. If it saves you an hour on a job, a one-time tip funds the next round of calculators and controller data.
Like it? Tip the dev.
Tips are one-time and totally optional. They unlock nothing — except a Supporter badge and a spot on the board. That's the whole business model.
Top supporters
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Verified tips only. First name + last initial — nothing else is shown.