Grain: Arrow Weight Matching

Grain builds the tightest-matched arrow set your components can produce. Most tools calculate one arrow at a time. Grain is different: it looks at every component you've weighed — every shaft, point, insert, nock, and fletching — and searches for the exact combination across your whole set that minimizes weight variance. Not an estimate. Not a manual spreadsheet. A real optimization built for competitive archers who take grain-level consistency seriously. HOW IT WORKS - Choose your components — start with the defaults or add your own - Weigh each one (spares welcome — Grain picks the best combination) - Set your tolerance - Get your matched build, arrow by arrow BUILT FOR SERIOUS ARCHERS Grain is made for Olympic and barebow recurve archers competing at the JOAD, collegiate, and USAT/World Archery level — where a few grains of variance matter. FREE TO START Try the full matching engine free, up to 6 arrows in one set. GRAIN PRO - Unlimited arrows per set - Multiple saved sets & quivers - Build history across a season - Custom exact tolerance - Multi-bow profiles Grain Pro is available as a weekly or yearly subscription. No free trial — the free tier is a real, working preview of the algorithm itself, not a countdown. Privacy Policy: https://drommarllc.com/grain/privacy. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/