iOS X-ref App

The fastest X-ray reference and calculators for beamline, diffraction, and lab work — fully offline and in your pocket when you’re in the hutch.

One-time purchase. No subscription, no accounts, no ads, no data collection.

〔Download on the App Store — link to be added once the app record exists〕

Scientific reference tool — not a medical device

X-ref is a reference and calculation app for X-ray physics. It does not capture medical images, diagnose conditions, provide treatment guidance, or measure radiation using your device's hardware.

What it does

Element X-ray data — A periodic table tuned for X-ray work: emission and absorption edges, line energies, and related properties at a glance.

Energy, wavelength, and d-spacing — Convert between photon energy, wavelength, and lattice d-spacing instantly, with the relationships you reach for at the beamline.

Attenuation — Estimate X-ray attenuation through materials to plan filters, windows, and sample setups.

Emission and absorption lines — Look up characteristic line energies and absorption edges across the elements without breaking focus.

Works where you work

X-ref runs entirely on your device. There is no login, no network requirement, and no cloud. It works on an airplane, in the field, and inside a lead-lined experimental hutch with no connectivity: the same places a beamline scientist actually needs it. Buy it once and carry it to any synchrotron.

Who it's for

Beamline scientists and facility staff first of all, plus visiting researchers, crystallographers, structural biologists, materials scientists, XRD/XRF practitioners, and students learning X-ray methods.

Privacy by design

X-ref collects no data, no analytics, no tracking, no crash reporting, no third-party code. There is nothing to opt out of because nothing is gathered. See the privacy policy for the full statement.

Accessibility

X-ref supports system Dynamic Type for larger text, works with VoiceOver for screen-reader users, and follows system Dark Mode and contrast settings. If you rely on an assistive feature that isn't working as you expect, please contact support — accessibility issues are treated as bugs, not edge cases.