Pulley Mech Advantage

Rope & Rigging Calculator

Only for iPhone

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

iPhone

Enter load weight, set rope segments, get instant mechanical advantage and effort — great for rescue, rigging, sailing, and stage. Stop guessing how much force your pulley system needs. Pulley gives you the exact mechanical advantage ratio and required effort in seconds — offline, every time. — KEY FEATURES — • Instant MA calculator: enter load weight (kg) and number of rope segments; get the mechanical advantage ratio and effort required immediately • Live rope-path diagram that redraws as you adjust segment count — see fixed and movable pulleys update in real time • Color-coded effort indicator: green (under 25% of load), orange (25–50%), and red (over 50%) so you know at a glance whether your rig is right • Eight classic pulley reference systems — Fixed, Movable, Block & Tackle 2:1/3:1/4:1, Compound, Gun Tackle, and Luff Tackle — each with MA ratio, rope segment count, use-case notes, and a diagram • Save unlimited load scenarios: name the lift, set the weight, pick the system, add notes, and Pulley stores the calculated effort alongside every entry • Five real-world seed scenarios (engine block, rescue litter, sail boom, stage counterweight, garage bike hoist) ready to explore on first launch • Supports up to 12 rope segments for compound and multi-block configurations • Fully offline — no account, no ads, no network access required Pulley is designed for riggers, sailors, rescue technicians, stage crews, and anyone who needs to plan a lift or understand how a block-and-tackle system works. Use it in the field, on deck, or backstage — no signal needed. — Pulley Mech Advantage PREMIUM — Premium unlocks the full Pulley experience: save unlimited load scenarios, access all eight reference rigging systems, build compound rigs up to 12 segments, and use every feature completely offline with no ads. Subscription options: • Weekly — $9.99 / week • Yearly — $49.99 / year (includes a 3-day free trial) Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the period. Manage or cancel anytime in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://pnkl26.web.app/privacy-policy

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Version 1.0 • Mechanical advantage and effort calculator: enter load weight and rope segment count for an instant MA ratio and required effort in kg • Live rope-path diagram that updates with each segment change, showing fixed and movable pulley positions • Color-coded effort indicator (green / orange / red) based on effort-to-load ratio • Eight reference pulley systems: Fixed, Movable, Block & Tackle 2:1/3:1/4:1, Compound, Gun Tackle, Luff Tackle — each with use-case notes and a diagram • Save and manage unlimited load scenarios with name, weight, system selection, and notes • Five pre-loaded seed scenarios across rescue, sailing, automotive, theatre, and home use • Fully offline — no account or internet connection required

Version 1.1.0

The developer, Linh Phan Nhat Khanh, 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
    • Linh Phan Nhat Khanh
    Size
    • 785.4 KB
    Category
    • Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 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
    • Pulley Mech Advantage Weekly $9.99
    • Pulley Mech Advantage Yearly $49.99
    • Learn More
    Copyright
    • © 2026 PNKL
  • Developer Website
  • Privacy Policy

    • More by Linh Phan Nhat Khanh

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