---
title: "Big Brown ToolKit — App Overview"
url: https://marlvel.ai/apps/com-stealthproductions-ups-toolkit
category: Reference
developer: Stealth Productions Limited
platforms: ios
rating: 5.0 (6 ratings)
pricing: paid
report_level: overview
generated: 2026-04-23
last_verified: "2026-04-23T07:50:45.455Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** This app serves as a specialized, all-in-one reference toolkit for flight crews to manage regulatory compliance and flight performance calculations.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Reference |
| Rating | 5.0 ★ (6) |
| Pricing | paid |
| Platforms | iOS |
| Latest Version (iOS) | 2.3 |
| Developer | Stealth Productions Limited |

<!-- SECTION: Summary -->
## What is Big Brown ToolKit?

Big Brown ToolKit is a comprehensive utility suite designed to assist aircrew with operational calculations and regulatory compliance. It consolidates essential aviation tools, including duty period calculators, meteorological decoders, and performance metrics, into a single mobile reference application.

<!-- SECTION: Key Features -->
## Key Features

- **Duty and Rest Management**: Calculates domestic and international duty periods, required rest, and crew rest timing.
- **Aviation Decoders**: Provides tools for decoding 8-digit runway states, SNOWTAM reports, and meteorological data.
- **Performance Calculators**: Includes cross-wind/head-wind analysis, density altitude, turn rate/radius, and low-temperature altimetry.
- **Operational Utilities**: Features unit conversions, exchange rate calculations, fuel volume/weight math, and a sick day tracker.

<!-- SECTION: Target Audience -->
## Who is it for?

Commercial and private aircrew members requiring rapid access to aviation-specific calculations and data decoding.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/big-brown-toolkit/id6475022221?uo=2)
- [Full Intelligence Report](https://marlvel.ai/apps/com-stealthproductions-ups-toolkit)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/com-stealthproductions-ups-toolkit).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*