Derrick: Oilfield Rotation

Keep your rotation and add your spouse or crewmate's with one Crew Pass — see the next day you're both home. Offline, private, pay once, no subscription.

Derrick is the rotation calendar built for oilfield hands — and it actually keeps your hitch straight.

Pick your rotation once (14/14, 14/7, 7/7, 21/21, 28/28, or a custom on/off), set the day your hitch starts, and Derrick paints your ON and OFF days correctly — for years. No drift. No "off by a day." No blank calendar when the new year rolls over. That sounds basic. It's the thing every other oilfield calendar gets wrong.

NEW — Crew Pass. Send your rotation to your crew or your spouse as a code and a QR. They scan or paste it and import your whole schedule in one tap — no re-typing dates, no getting a day wrong. Free, offline, no account.

FREE • Big, glanceable countdown — HOME IN __ DAYS / BACK IN __ DAYS • Today at a glance — "On hitch · Day 9 of 14" • Full month calendar with your ON/OFF days in color — scroll years ahead or back • Agenda of your upcoming hitches and time off, with exact dates • Crew Pass — share your rotation as a code/QR; your crew imports it in one tap • Home Screen & Lock Screen widgets • Crew-change reminders the evening before • Day & night shifts • 100% offline. No account, no sign-up, nothing leaves your phone.

DERRICK PRO — one-time unlock (no subscription) • Whole year on one page — export a clean, printable PDF (one year per page, not 12 separate months) • Plan your life around your hitch — add birthdays, weddings, hunting season, the kids' games, and see instantly whether you'll be home or working • Track your money — pay, per-diem, days worked & overtime, in your currency (USD, CAD, GBP, AUD, NOK, EUR & more)

Buy Pro once and keep it. No subscriptions. No ads. No data collection.

Crew change shouldn't be this hard to track. Now it isn't.