Hatchmark

Name: Hatchmark
Author: Vulcan Systems LLC

By: Vulcan Systems LLC App

Fly Fishing Field Journal

Overview

Apple Apps Store

Version:

1.0

Last updated: 2026-06-02

Ranking

#1,779,759 ▲

Overall

Features & Capabilities

The fly box that fills as you fish. 67 patterns, 12 months of hatch data, an offline knot library, and a journal that remembers every cast.

Hatchmark is a fly fishing field journal built for anglers who care about the details.

Your fly box starts empty. As you log sessions and add the patterns you actually tie, it fills with the flies that matter to you — not a generic reference set. Every entry builds your fishing story.

WHAT'S INSIDE

Your Personal Fly Box

Start empty, fill as you fish
Add patterns by logging a session, or browse the full 67-pattern catalog
Multi-page expansion once your collection grows
Personal notes on every pattern

The Pattern Catalog

67 hand-illustrated fly patterns
Organized by Dry Fly, Nymph, Streamer, Wet Fly, Emerger, Terrestrial, Worm, Egg, and Specialty
Recommended sizes, when to use, and field notes for every pattern

The Hatch Guide

12 months of Rocky Mountain hatch data
Insect identification with scientific names and sizes
Matching fly pattern recommendations for every hatch
Tap any pattern to view the full detail
Works completely offline

The Knot Library

Six essential fishing knots with step-by-step illustrations
Clinch, Improved Clinch, Palomar, Blood, Surgeon's, and Loop
Available offline wherever the river takes you

The Logbook

Capture every session in seconds
Date, water, species, fly used, environmental conditions
Year-filtered statistics and a season heatmap
Your fishing year, visualized

OFFLINE BY DESIGN

Hatchmark stores everything locally on your device. The full pattern catalog, hatch guide, and knot library work without any internet connection. Your sessions and notes belong to you — no servers, no tracking, no telemetry.

HATCHMARK PREMIUM

Hatchmark requires a subscription to access full functionality after a 7-day free trial.

Monthly: $4.99/month
Annual: $39.99/year (save 33%)

Subscription auto-renews unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID subscription settings.