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Tie more consistently, calculate proportions faster, and keep your fly-tying references in one place. This fly-tying utility is designed as a practical bench companion for fly tyers who want accurate, repeatable measurements without relying on mental math, memorised proportions, or scattered reference charts. Select a pattern style and hook size, and the app calculates key fly proportions—including tail, body, wing, and hackle measurements—in clear millimetre or inch values. Each measurement also shows the proportion it is based on, making the results easy to understand and follow while tying. Key Features Proportion Calculator Calculate fly proportions based on your selected pattern style and hook. Measurements update automatically when you change the style or hook size, helping you maintain consistent proportions across different sizes. Pattern Library Create and organise your own fly patterns with hook, style, target species, calculated proportions, and tying details. Create, rename, duplicate, edit, and delete patterns with ease. Material Proportion Reference View key measurements in a clear, bench-friendly format. Pin a pattern as your active reference so the measurements you need remain easy to access while tying. Hook Size Reference Cross-reference hook sizes with gap and shank measurements. Search and filter hook data to quickly find the information you need. Pattern Notes Keep step-by-step tying notes, material choices, adjustments, and other details with each saved pattern, making successful flies easier to reproduce. Thread Reference Get practical guidance on thread denier, applications, and bobbin tension, including considerations for fine-wire and heavier hooks. Material Weight Calculator Estimate the finished weight of a fly using the selected hook and materials, with a relative sink-rate indication to help compare lighter and heavier builds. Dubbing Blend Calculator Create repeatable dubbing mixtures by entering colours, ratios, and a target batch weight. The app calculates the required amount of each colour and lets you save blends for future use. Batch Tying Log Record tying sessions, patterns, quantities, materials used, and quality ratings. Premium access provides unlimited batch history. Seasonal Pattern Guide Explore pattern guidance organised around season and water type, helping you plan which styles to tie for different fishing conditions.