iPhone Screenshots


Rigger Ref is a reference and calculation utility for riggers. Keep specifications of ropes, hardware, slings, and material densities at your finger tips. Quickly figure safe working loads, line sag, amount of line on a drum, and bridle calculations.

Calculation features:
-Figure Catenary curves based on line tension, weight, line weight, and tower heights.
-Figure amount of Line on a Drum using Drum Calc
-Estimate weights based on volume and materials using Load Calc
-Figure sling tension, and angles for different bridles
-US and Metric units / on the fly conversion

Reference Features:
-Common Rope Specifications
-Common Hardware Specifications
-Common Sling Specifications
-Search Specifications and Comments
-Automatically figure Safe Working Loads

Customization Features:
-Add your own Ropes or Hardware
-Set your own Safety Factors for figuring Safe Working Loads
-Track which ropes and hardware you've got on hand.
-Create manifests of frequently used equipment to automatically total weights or costs.
-Track when a manifest or equipment exceeds or falls short of a weight budget.
-Mail manifests of equipment or labor quickly.
-Easily import manifests onto other devices running Rigger Ref.

What's New

Version 2.0.0

Updated Look and Feel
Support for Dynamic Text Sizes
Support for iOS 11

Ratings and Reviews


Rigger's dream

Outstanding simple interface for referencing sling and hardware capacities. I have tried others but find this app to be the most clear and usable in the field.


Not what I was looking for

Does not give any useful information.


Gumball Labs LLC
7.9 MB
Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Gumball Labs 2017


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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