Understanding Mono vs Fluoro Leaders
When to choose each, and how diameter affects turnover and stealth.
Leader calculators, gear checklists, AFFTA sizing, and a fishing log that works with or without reception.
Everything you need for a smoother day on the water.
Build basic & advanced leaders with clear step‑by‑step guidance.
Never forget tippet, nippers, or spare leaders again.
Understand rod/line ratings and match setups quickly.
Works anywhere. No sign‑up. No reception required.
Start free. Upgrade when you're ready.
| Feature | Free | Pro |
|---|---|---|
| Basic Leader Calculator | ✓ | ✓ |
| Advanced Leaders (multi‑discipline) | — | ✓ |
| Save & Load Profiles | — | ✓ |
| Export / Import & Share | — | ✓ |
| Fishing Log | — | ✓ |
Hi, I'm Tony. I built Fly Fishing Toolbox to cut through the confusion around leaders, line ratings, and on‑water prep — so you can focus on the cast, not the calculations.
A clean interface that works on and off the grid.
Quick answers to common questions.
Yes. FFT is offline by design. No account, no reception required. Your data is stored locally on your device.
In the Pro version, open About → Export/Import to save an encrypted backup file. Keep copies on another device or cloud drive for safety.
AFFTA is a standard that maps fly line weights (e.g. 5‑wt) to actual grain weights, so you can match line and rod properly.
Tips, updates, and stories from the water.
When to choose each, and how diameter affects turnover and stealth.
Small items that save a day on the river — and how to pack them.
A quick look at the newest improvements and what’s next.
Ready to simplify your next trip? Download the free app now, and upgrade to Pro anytime.