Down Zero

Krumble Labs

About this app

Down Zero is a scorekeeping app for practical shooting training, built around the way scores are actually called on the range: you enter the time and the points down — Charlies, Deltas, misses — and the app does the rest. Alphas are derived, never counted by hand. A clean pass is exactly what it should be: down zero.

BUILT FOR TRAINING
Set up your stages once — paper targets and steel — and record pass after pass with a fast, keypad-first entry screen designed for range use. Impossible entries are blocked before they happen, so scores stay consistent.

REAL IPSC SCORING
Scores follow IPSC Minor scoring math, including no-shoots and procedural penalties. Every pass gets an instant result the moment you save it.

TRACK SHOOTERS AND CHAMPIONSHIPS
Keep scores for multiple shooters, run training championships across stages, and see how everyone stacks up.

PRIVATE BY DESIGN
Everything stays on your device. No account, no ads, no analytics, no internet required — your training data is nobody's business but yours.

Available in English and Spanish.