OT Toolbox: PLC & Automation

Industrial Calculators & Tools

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

OT Toolbox is a compact collection of practical tools for automation, controls engineering, commissioning, maintenance, and industrial service. Instead of searching through formulas, tables, and separate apps, keep essential OT calculations organized in one place – directly on your iPhone and without an account. NETWORKING AND INDUSTRIAL COMMUNICATION • IPv4 subnet calculator with network, broadcast, host range, and wildcard • IP comparison plus CIDR and subnet-mask conversion • IP planning, device inventory, and port reference • PROFINET device-name validation • OPC UA endpoint builder • Data-rate, transfer-time, and Ethernet frame-budget calculations SIGNALS AND INSTRUMENTATION • Linear scaling for analog values and PLC raw values • 4–20 mA troubleshooting, loop budgeting, and measurement-error estimation • PT100 resistance and temperature conversion • PT100 lead-wire error estimation • RC low-pass and ADC resolution calculations PLC, DATA, AND MODBUS • Binary, decimal, and hexadecimal conversion • Bit masks and two's-complement representation • Modbus address and FLOAT32 data conversion • Register-block planning and RTU timing • PLC time formats, watchdog sizing, memory demand, and cycle-load analysis ELECTRICAL AND ENERGY • Ohm's law plus active, apparent, and reactive power • Voltage drop and cable losses • 24 V DC power-supply sizing with reserve • UPS runtime and capacitor backup estimation • Energy consumption and operating-cost calculations DRIVES AND PNEUMATICS • Motor speed, motor torque, and gearbox calculations • Encoder resolution, positioning accuracy, and conveyor speed • Drive ramps and braking energy • Air consumption, cylinder force, and valve-island reserve SERVICE AND PRODUCTION • Unit, time, and cycle-time conversion • OEE and MTBF/MTTR availability • Maintenance-interval forecasting • Guidance calculation for safety distance • Formula reference for recurring tasks BUILT FOR DAILY FIELD WORK Clear field labels, units, and contextual help show exactly what to enter. Favorites, history, and templates bring frequently used tools back quickly. Colleague Mode presents results clearly and makes technical calculations easier to share. PRIVACY WITHOUT FRICTION Technical inputs stay locally on your device. No account, no tracking, and no ads. A selection of core tools is available for free. OT Toolbox Pro permanently unlocks advanced calculators and productivity features with one in-app purchase – no subscription. Important: Results are calculation aids. Manufacturer documentation, applicable standards, safety requirements, and review by qualified professionals always take priority.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

NEW: COMMISSIONING ASSISTANT WITH OT TOOLBOX PRO • Document plant projects locally with devices, checklists, and measurements • Record PLCs, HMIs, drives, and sensors; check IP addresses, PROFINET names, and port entries • Keep 24 V supply, voltage-drop, analog-signal, and motor checks within each project • Add photos, notes, open defects, and corrective actions to each inspection step • Record the inspector, status, and inspection time; changed technical inputs reopen previous approvals • Export and share complete PDF reports with project summaries, inspection data, and photos iPHONE DUO AND WIDE DISPLAYS View the checklist and selected inspection step side by side. Duo layouts adapt to the device fold. WHAT'S NEW Read the latest changes anytime in Settings. They appear automatically once after an update, without an update popup on first installation.

Version 1.2

The developer, Dominik Gausmann, 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
    Dominik Gausmann
    Size
    9.9 MB
    Category
    Utilities
    Compatibility
    Requires iOS 18.0 or later.
    • iPhone
      Requires iOS 18.0 or later.
    • iPad
      Requires iPadOS 18.0 or later.
    • Mac
      Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
    Languages
    English and 6 more
    • English, Dutch, French, German, Italian, Polish, Spanish
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 DMNK Digital
  • Developer Website
  • Privacy Policy

    • More by Dominik Gausmann

    You Might Also Like