What you're paying for
Static DA calculators tell you the air. Logbook apps store your passes. ET Engine is the only one that blends live weather with a model that learns your specific car, reads your time slip off a photo, syncs your whole crew, and — nobody else does this — tells you whether the dial you actually used is winning or costing you rounds.
How it stacks up
| Feature | Free DA calculators | DragTuner | HowFast | Crew Chief Pro | ET Engine |
|---|---|---|---|---|---|
| Live weather → DA | Manual only | Yes | Yes | Yes (hardware) | Yes (free API) |
| Learns your car over time | No | No | Yes | Yes | Yes |
| Photo slip-scan logging | No | No | No | No | Yes |
| Multi-car / crew cloud sync | No | No | No | Yes (add-on) | Yes |
| Bracket outcome tracking win/loss, breakout, margin | No | No | No | No | Yes |
| Required hardware purchase | — | None | None | Weather station | None |
| Mobile-first UI | Basic | Yes | Yes | Desktop-era | Yes |
| Typical cost | Free | $34.99/yr | One-time (undisclosed) | $510–2,000+ w/ hardware | $249–999 |
Sources: DragTuner ($3.99/mo, $34.99/yr), HowFast (free download, one-time Pro upgrade), Crew Chief Pro Jr ($509.99 + add-ons, hardware required for real-time weather).
Plans
Every plan starts free. No credit card to try the core predictor.
Free
- Physics-based ET prediction
- One car, on-device only
- No cloud sync, no trend model
Racer
- Blended physics + trend model
- Cloud sync, multi-car profiles
- Photo slip-scan logging
- Bracket performance reports
Crew
- Everything in Racer
- Unlimited drivers & cars
- Shared team code, shared air
🏁 Founder's Lifetime — limited
Reward for testing it before it was finished. Priced below the standing lifetime rate, capped to the first 100 licenses per tier — once they're gone, lifetime reverts to the regular price above.
Ready when you are
Every plan starts on the free tier — no card required.
Open the ET Engine → Read the Beta Guide