TallyRig: Well Control Calc

Oilfield Calcs + Saved History

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

New in 1.1: 17 oilfield calculators, faster and cleaner. Kick Tolerance, Kill Sheet, Hydrostatic, Hydraulics, ECD & more — search, arrange, save & share. 17 oilfield & drilling calculators — with a digital tally-book history. TallyRig is a focused, field-ready calculator set for drilling and well control workflows. Run the essentials fast, save every result, and share a clean record when you need it. DESIGNED FOR THE RIG • Sunlight Mode: high-contrast screens you can read outside • Glove-friendly: big targets, minimal tapping • Offline-first: works without a signal • Trust the math: review the formula / show-work for each result 17 FIELD CALCULATORS, ORGANIZED BY CATEGORY • Well Control: Kill Sheet (Wait & Weight), Kick Tolerance, Gas Migration, Trip Fill, BOP Check (API Std. 53) • Pressure: Hydrostatic, EMW from Pressure, ECD • Fluids: Mud Weight-Up (barite), Slug, Cementing • Tubulars: Pipe Tally, Buoyancy, Capacity, Stuck Pipe (Free Point) • Hydraulics: Pump Output, Flow, Annular Velocity, Bottoms-Up • Utilities: Oilfield Unit Converter FIND TOOLS FAST Search, category filters, and a drag-to-arrange dashboard so your most-used calculators are always on top. HISTORY THAT'S ACTUALLY USEFUL • Save any calculation to a clean history timeline • Share a result card or a history record with your team • Sync across devices via iCloud (when enabled) UNITS Switch between Imperial and Metric (SI) where supported. WHO IT'S FOR Drilling engineers, toolpushers, drillers, mud engineers, wellsite supervisors, and well control trainees who want a fast, reliable pocket reference. IMPORTANT TallyRig is a calculation aid for reference and cross-checking. Always verify inputs and outputs and follow your company procedures and training.

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TallyRig is now a 17-calculator oilfield suite. • 13 new calculators since launch — Kick Tolerance, Hydrostatic, EMW, Hydraulics, ECD, Buoyancy, Capacity, Mud Weight-Up, Slug, Gas Migration, Trip Fill, Pipe Tally + a full Unit Converter • New dashboard: search, category filters, and drag-to-arrange so your most-used tools stay on top • Tougher, unit-aware math — every calculator is proven across Imperial and Metric • Polished result views with show-work formulas, saved history, and one-tap share • Bug fixes and performance improvements Like TallyRig? A quick rating genuinely helps a small team keep building. Thank you.

Version 1.1.0

The developer, 嘉炜 丰, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • 嘉炜 丰
    Size
    • 33.8 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 13.0 or later.
    • iPhone
      Requires iOS 13.0 or later.
    • iPad
      Requires iPadOS 13.0 or later.
    • iPod touch
      Requires iOS 13.0 or later.
    • Mac
      Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Andy Feng
  • Privacy Policy

    • More by 嘉炜 丰

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