A precise 3-DoF firing solution is just one piece of the picture — and you can make it dead-on, truing it easily against your real field data or another calculator. Design your stages and run them live, manage every rifle, load and DOPE, and call holds hands-free by voice — with sharing gear and data across your peers on the way. It runs in your browser, installs like an app, and keeps working with no signal at the range.
Early access — this is pre-beta. Range Day is under active development: features will change, your data may reset between updates, and you'll hit rough edges. Use it, lean on it at the range, and tell us what breaks.
A real solver and field-ready tools, not a stripped-down calculator.
3-DoF point-mass RK4 with G1/G7 drag, full-vector Coriolis, spin drift, aerodynamic jump, and a humidity-aware atmosphere model.
Local-first and offline-capable: the calculator and your data live on your device, so it keeps working with no connection.
Hands-free holds, wind calls, and engagement logging — ask for a solution and keep your eyes on the target.
Build stages and props, run them, record stage audio, and keep a full DOPE log of every engagement.
Multi-distance muzzle-velocity / BC fits, drop-scale bands for the transonic, and first-round hit probability (WEZ).
Runs in any modern browser and installs as an app on phone or desktop — no app store, no waiting on updates.
An honest look at where Range Day shines — and where established tools still lead.
| Feature | Range Day | Competitors |
|---|---|---|
| 3-DoF solver (Coriolis, spin drift, aero jump) | Yes | Yes |
| Humidity-aware atmosphere | Yes | Yes |
| Hit probability (WEZ) | Yes | Yes |
| Truing (multi-distance MV/BC, drop-scale) | Yes | Yes |
| Custom bullet-specific drag models | G1 / G7 | Yes |
| Hardware integration (Kestrel, rangefinders) | Planned | Yes |
| Free tier · runs in any browser · installable | Yes | Paid · native app |
Comparison reflects typical competing ballistic apps based on publicly available information as of June 2026; features vary by product and may change. Product and company names are the property of their respective owners. Verify current features with each provider.
On the math we hold our own — but the solver is just one piece of the picture. Most ballistic apps stop there; Range Day is the whole system you shoot with around it.
Profiles, rifles, barrels, scopes and loads — plus DOPE logs, shot groups, and barrel round-count & maintenance, all in one place.
Build stages with props and positions, run them live, and score every engagement against your data.
Record and play back stage audio with transcription — review your run and your calls afterward.
Ask for holds, wind calls and logging out loud, eyes on the target.
Share gear, DOPE and stages with your squad — build and shoot from the same data.
Natural-language coaching and queries over your own data — ask questions, get answers.
Your data backed up and synced across phone, tablet and browser.
No Kestrel or rangefinder integration today like some established tools have. It's on the roadmap — for now you enter conditions and ranges yourself.
Start free. Upgrade when you want the field tools.