Coriolis Precision

**Coriolis Precision is the ballistics solver and record book for lawful, licensed shooting - built privacy-first, and kept entirely on your device.** Work a firing solution that accounts for the physics most apps skip: gravity, aerodynamic drag (G1, G7 and a rimfire-specific model), spin drift, Coriolis and the Eötvös effect, air density, and shot angle. Tap any factor to see the full working, every constant shown - nothing hidden behind a black box. **A complete record book for the licensed shooter** - Your firearms, optics and equipment - an armoury with photos, serial numbers and fitted kit - Your certificates - Firearms, Shotgun and Explosives - with entitlements, calibres and renewal reminders - Your ammunition holdings, tracked against your certificate's permitted storage - Range sessions - a journal of when, where, what you shot and how it went, with chronograph import - Activity reports - a clean PDF of your holdings and firing record for a renewal or audit **For the handloader** Keep records of your own loads and load-development results - ladders, group analysis and velocity data. Coriolis surfaces and organises your data; it never prescribes a load or a charge weight. The decision, and the responsibility, stay with you. **At the range** - A library of printable target faces - ISSF, service, sighting grids and more - Photograph your target and let the app measure your group - Compare ammunition and settle which load your rifle prefers **Private by design** Your identity, firearms, certificates, ammunition and records stay on your device - never uploaded, never sold, no trackers, no ads. We keep nothing about you on our own systems. (See our privacy policy.) **Who it's for** Coriolis Precision is a comprehensive tool for shooters wanting to maximise their enjoyment, used in line with firearms law in the UK, it allows you to record your "good reason". You must be at least 14 to use it; anyone under 18 should use it with a parent or guardian's consent. Coriolis Precision is a records and reference aid. It does not sell firearms, ammunition or components, and provides no manufacturing instructions. Always shoot safely and within the law; you are responsible for your own decisions.