Derrick: Oilfield Rotation
Hitch calendar & crew change
About
This app helps oilfield workers accurately track their work and time off rotations for years to come. It offers features like glanceable countdowns, full-month calendars, and crew sharing via QR codes. An optional one-time purchase unlocks advanced planning and financial tracking tools.
What's New in Derrick
1.3.0
July 29, 2026
What's new in 1.3 • My Crew keeps your rotation and adds one spouse or crewmate from their Crew Pass — no more replacing your own schedule. • See both schedules together and the next day you're both home, all offline. • Free, private, and fully offline — no account or subscription.
MoreIn-App Purchases
$29.99
Derrick Pro — Lifetime
Plan life around your hitch + track payday & overtime.
Developer apps
FAQ
How does Derrick handle different rotation schedules?
Derrick allows you to pick your rotation once, such as 14/14, 14/7, or custom on/off periods, and it will accurately paint your ON and OFF days for years without drift or errors, even across new year rollovers.
Can I share my schedule with my crew using Derrick?
Yes, Derrick features 'Crew Pass' which lets you send your rotation to your crew or family as a code or QR. They can then import your entire schedule with a single tap, eliminating the need for re-typing dates.
Does Derrick require an account or internet connection?
No, Derrick is 100% offline and does not require an account or sign-up. Nothing leaves your phone, ensuring your data remains private.
What features are included in Derrick Pro?
Derrick Pro, available as a one-time unlock, offers a full-year view on one page exportable as a PDF, the ability to plan personal events around your hitch, and detailed financial tracking for pay, per-diem, and days worked in various currencies.
How often is Derrick updated?
The latest version, 1.2.0, was last updated on July 11, 2026. Updates aim to improve reliability and add features based on user needs.
What devices does Derrick support?
Derrick is currently supported on iPhone devices.
What is the age rating for Derrick?
Derrick has an age rating of 4+, making it suitable for a wide range of users.
Does Derrick have ads?
No, Derrick is ad-free. The developer explicitly states 'No ads' for both the free and Pro versions.