Reelos app icon

Reelos Calculate Every Wrap Before You Spool

Professional drum rigging calculator with automatic fault detection – prevent costly spooling errors in seconds

iOS 2.1
16 Line Types
Offline Ready
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Exclusive Launch Offers

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No Deposit

Instant Access Bundle

Promo Code
REELOS50
  • Full library access – all 16 line constructions unlocked
  • No account required – download and calculate immediately
  • Valid for first 200 downloads only
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Fleet Angle Pack

Advanced Visualization

Promo Code
FLEET75
  • Real-time fleet angle calculations with visual feedback
  • Layer-by-layer wrap table with crush index analysis
  • 12-item lead hardware reference library
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All offers valid for new downloads only. No subscription required. Offline functionality included in all packages. Age rating: 4+.

How Reelos Eliminates Spooling Failures

Blueprint-level precision for marine, industrial, and stage rigging professionals

Reelos transforms drum spooling from guesswork into precision engineering. Before winding a single metre of line, you visualize the entire spool development as a color-coded matrix. Every wrap position is calculated. Every potential fault is flagged. Every fleet angle is verified against acceptable limits.

The app maps nine critical spooling faults automatically – seated wraps, gapped turns, crossed zones, crushed contacts – and links each fault directly to the configuration field causing it. You fix the problem before the line ever touches the drum. No more wasted line. No more damaged rigging. No more paying twice.

Built for professionals who work with yacht recovery drums, industrial hoists, or stage rigging systems, Reelos calculates layer-by-layer wrap patterns using real drum geometry, actual line construction data, and precise lead hardware specifications. The interface is a technical schematic – dark navy backgrounds, blueprint-style diagrams, high-contrast cyan highlights – designed for deck operators wearing gloves in harsh conditions.

Verified Specifications

Platform iOS 2.1
Line Library 16 Constructions
Lead Hardware 12 Items
Bench Tools 6 References
Fault Detection 9 Patterns
Unit Systems Metric / Imperial
Offline Mode Full Functionality
Account Required None
Updated November 2026

Core Capabilities

Professional-grade tools for precise drum and line rigging

⊞

The Board Visualization

Color-coded matrix showing every wrap, every layer, every fault before you spool. Blueprint-style diagrams reveal drum development patterns at a glance – identify crushed contacts, gapped turns, and zone crossings instantly.

↻

Build Configuration

Configure drum geometry, select from 16 line constructions, and set up lead hardware in minutes. Real cross-section diagrams for 6-strand nylon, 3-strand manila, 8-strand plaited, double braid polyester – each with accurate diameter, mass, and crush behavior data.

⊟

Layer-by-Layer Table

Ruled rows show wraps completed, stored metres, cumulative capacity, pitch diameter, line pull, line speed, and crush index for each layer. Export calculations before starting physical spooling work.

△

Automatic Fault Detection

Nine common spooling faults mapped automatically to the exact configuration field causing the problem. Click a fault, fix the value, recalculate – done. No manual troubleshooting required.

✓

Wrap Check Photo Log

Document each layer with timestamped photos, metadata, and status badges. Mark layers as Sorted with green confirmation. Replace or remove frames. Track baseline photos taken during actual spooling operations.

◇

Fleet Angle Calculator

Real-time trapezoid visualization shows acceptable fleet angle band. Adjust sheave distance, lateral offset, and lead height with sliders – watch geometry confirmation update instantly. Verify angles fall within 0.6 to 2.0 degree limits before rigging.

Technical Operation

Precision workflow for industrial and marine rigging professionals

Setup Process

  • Input drum barrel dimensions and groove specifications – milled-grooved, plain-grooved, or welded barrel types supported
  • Select line construction from library – 16 types including 6-strand laid nylon, 3-strand manila, 8-strand plaited, 12-strand single braid, double braid polyester and nylon
  • Configure lead geometry with sheave distance, lateral offset, and lead height sliders for precise fleet angle control
  • Attach lead hardware from 12-item reference library – snatch blocks, roller fairleads, hawse fairleads, bow shackles with SWL and D/d ratings
  • Review the Board matrix showing color-coded wrap patterns before physical implementation

Calculation Features

  • Layer table displays wraps, stored metres, cumulative capacity, pitch diameter, line pull, line speed, and crush index per layer
  • Fleet angle visualization confirms geometry falls within acceptable band using real-time trapezoid diagrams
  • Fault detection scans for seated wraps, gapped turns, crossed zones, crushed contacts, and six other common errors
  • Unit selection switches between metric and imperial measurements – metres/kN or feet/lbf throughout entire interface
  • Photo documentation captures timestamped wrap check images with layer metadata and Sorted status confirmation

About The Developer

Reelos 2.1 was built for deck operators, hoist technicians, and stage riggers who need absolute precision before committing to physical spooling. Version 2.1 introduces smoother animations and refined fault mapping algorithms. The app requires no account, no subscription, and works fully offline – download once, calculate forever.

Start Calculating Now

iOS 2.1 · Offline Ready · No Account Required · Updated 03.11.2026

Download Reelos

Requires iOS device · Age rating 4+ · Contains no ads · Full offline functionality