About Us

Built by a Tool Hand. For the Field.

My TallyBook wasn't born in a tech incubator. It was born on a rig floor, out of frustration with the same problems every crew faces.

The Story Behind My TallyBook

With over 45 years of combined Tool Service Hand experience in the oilfield, our team has seen firsthand the recurring challenges of using paper tally books. Critical measurements — such as depth, tubing, joints, and BHA data — are often compromised by smudged ink, torn pages, and manual calculation errors made under harsh field conditions.

These inaccuracies are more than just an inconvenience; they lead to costly disputes, safety concerns, and operational delays. We knew there had to be a better way, so we built one.

Our team created My TallyBook to establish better accuracy for industry professionals while saving time and reducing errors on the fly. We welcome the opportunity to discuss how this solution can benefit your operations.

"I created My TallyBook to save time, money and errors on the fly while establishing better accuracy for myself and the professionals in my industry."

John Ortegon

Founder & Developer

45+ years of combined oilfield service experience

Company Information

Legal Entity: JAZ 12-16 LLC

Product: My TallyBook

Platforms: iPhone (iOS 15.6+) & Android

Languages: English & Spanish

Contact: [email protected]

What Drives Us

Accuracy First

Every feature in My TallyBook exists to make field measurements more accurate. If it doesn't improve accuracy, it doesn't belong in the app.

Built for Real Work

We don't build features for demos or investor pitches. We build features that field crews actually use, in conditions that actually exist.

Transparency & Trust

When every crew member sees the same numbers, trust goes up and disputes go down. That's the foundation of everything we build.

Want to Learn More?

We'd love to hear from you. Whether you have questions about the app, want a demo, or just want to talk shop — reach out.

Get in Touch