Store Download
The Digital Tally Book

Every calculation.
One app.
No signal required.

MudMan replaces the paper tally book with an offline-first field calculator built by a fluid tech who got tired of doing math in the mud. Enter your rig specs once. Every calculation updates automatically.

Offline First
Android · Google Play
iOS · Coming Soon
Field Calculators
Rig-Aware

The Old Way

Paper tally books that get soaked in mud
Re-entering rig specs into every calculator
Separate apps for pump output, annular volume, bottoms up
No signal at the rig site means no cloud apps
Scratching formulas on a whiteboard

The MudMan Way

✓ Everything on your phone, rain or shine
✓ Enter rig specs once, used everywhere
✓ All calculations in one app, derivations chain automatically
✓ Works with zero connectivity, built for dead zones
✓ Live results pinned to your home screen
Built-In Calculators
Field calculations that chain together automatically
Pump Output
bbl/stroke from liner + efficiency
Annular Velocity
ft/min per section
Bottoms Up
strokes and time from bit
Total Circulation
full system volume
Annular Volume
multi-section cased + open hole
Pipe Capacity
drill pipe + BHA volumes
Weight Up / Down
barite and dilution calcs
Alligation
mixing ratios and parts
Cuttings
volume and retention factor
Vis Cup Flow Rate
Marsh funnel bbl/hr
And More
the library keeps growing
See It In The Field
Built for the rig, not the boardroom.
MudMan Hub screen showing the active well card, drilling update, and quick access drawer
Hub
MudMan Calculators screen showing categories for Pump & Circulation, Volume & Capacity, Pressure, Mud Weight, and Reference
Calculators
MudMan Tally Book screen showing saved calculation cards and print/export option
Tally Book
MudMan Profiles screen showing Operators, Rigs, Pads & Wells, and Tank Farms
Profiles

Enter it once. Used everywhere.

MudMan follows the DRY principle: Don't Repeat Yourself. Your rig specs, interval geometry, and SPM flow into every calculation automatically. Change your bit depth and watch bottoms up, circulation time, and annular volumes update in real time.

Operator → Rig → Well → Interval. One data hierarchy. Every calculation reads from it. No re-entering numbers you already typed.

The field tool you wish you'd had ten years ago.

Get MudMan

MudMan is live on Google Play. iOS support is on the way.

Get it on Google Play
iOS coming soon