hooks from
16 makers

Fly Tying Inventory

Woolly Bug keeps track of every material on your bench, every pattern you tie and every hook you could swap in.

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Free on iPhone and iPad

Woolly Bug inventory screen listing materials grouped by type

Material inventory

Every feather, bead and spool, with sizes, colours, quantities and exactly which box it's in.

Hook Finder

Search 700+ hooks by shank, wire, gape and eye, then see the closest match from every other maker.

More about Hook Finder

Pattern Keeper

Save the full recipe for every fly you tie, from hook and thread down to the ribbing.

What can I tie tonight?

Woolly Bug checks each pattern against your stash and shows exactly what's missing.

Never buy the same spool twice

Build a shopping list at the bench and tick it off at the shop. Anything you already own is flagged before you pay for it again.

Bring your spreadsheet

Import an existing list from Excel, Numbers or Google Sheets. Export the lot whenever you like.

At the bench or in the shop

Syncs between iPhone and iPad through the cloud, or directly over Wi-Fi when there's no signal.

Made at a tying bench

Woolly Bug started with a cluttered bench, a scribbled materials list, and one too many trips to the shop for a spool that was already in a drawer. It's the tool we wished existed, built around how fly tyers actually work.

Add materials in secondsSizes, colours and quantities are suggested as you type.

See what you can tieEvery saved pattern is checked against what's on your bench.

Backed up automaticallyYour stash syncs to the cloud, so a lost phone isn't a lost inventory.

No signal neededEverything works offline, at the bench or at the river.

Built the way a tyer would want it

Works without signal

Everything lives on your device, so it works at the river. It syncs when you're back online.

Your data stays yours

Export your whole inventory to CSV any time, and open it in any spreadsheet.

Free to start

Download free and add your first materials today. Upgrade when you need more room.

Questions

Is Woolly Bug free to download?

Yes. Woolly Bug is free to download from the App Store, so you can start cataloguing your materials right away. The free version has some usage limits, with an upgrade available when you're ready for more.

Do I need an internet connection to use Woolly Bug?

No. Woolly Bug stores everything on your device, so it works fully offline at the bench or on the water. When you're back online, your data syncs securely to the cloud as a backup.

What kinds of fly tying materials can I track?

Everything on your bench: hooks, threads, dubbing, hackle, feathers, beads, wire, flash and more. Each item supports sizes, colours, brands and quantities, so your records match real life.

Can Woolly Bug tell me what I can tie right now?

Yes. Save your patterns with their full recipes and Woolly Bug cross-checks them against your stash, showing at a glance which flies you can tie and which materials you're missing.

Which devices does Woolly Bug support?

Woolly Bug runs on iPhone and iPad with iOS 17 or later. Your inventory syncs across devices, so you can add materials on your phone at the shop and browse patterns on your iPad at the bench.

Tie more.
Worry less.

Free on the App Store for iPhone and iPad.