AppMarketSpy › Sports › Grain: Arrow Weight Matching
Grain: Arrow Weight Matching
Calibrate & Balance Your Set
JEFFREY JACE CALLOR · Sports
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App info
- Developer
- JEFFREY JACE CALLOR
- Category
- Sports, Utilities
- Released
- Oct 9, 2026
- Version
- 1.0 (Oct 9, 2026)
- Price
- Free
- Size
- 40.6 MB
- Requires
- iOS 16.4
- Age rating
- 9+
- Languages
- English
In-app purchases
| Grain Pro Weekly | $2.99 |
| Grain Pro Yearly | $39.99 |
Current prices, App Store US.
🔒 Price history2 snapshots: when prices changed and new plans appearedGet Pro access
About 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…
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