# Spectral Calculator

> Spectral Calculator (iPhone/iPad app by Mark Zieg.)

- Source: https://appshunter.io/ios/app/spectral-calculator/id1528209782 (this page in markdown: same URL + `.md`)
- Developer: [Mark Zieg](https://appshunter.io/developer/795891558)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 8.0 · 33 MB
- Released: 2020-08-19
- Data updated: 2026-06-01
- User reviews in markdown: https://appshunter.io/ios/app/spectral-calculator/id1528209782/reviews.md

## What is Spectral Calculator?

One of the coolest parts of Raman spectroscopy is seeing the same chemical signature returned in relative wavenumber space irrespective of the laser excitation wavelength.  However, converting between wavelength and wavenumber can be cumbersome, especially when trying to compare spectral ranges between spectrometer models.

The Wasatch Photonics Spectral Calculator is designed to let you quickly and easily convert between wavelength and Raman shift in wavenumbers for a given laser wavelength, and also to let you easily determine the spectral range of a system in either wavelength or wavenumber space.


## Version history (last 1 release)

### 1.3 — 2021-03-13

Added animations to indicate the order of calculations, and a new "Explain This" button to walk the user through the equations.

## Related topics

[spectral calculator](https://appshunter.io/ios/topics/spectral-calculator) · [spectral vision](https://appshunter.io/ios/topics/spectral-vision) · [spectral](https://appshunter.io/ios/topics/spectral) · [spectral eye](https://appshunter.io/ios/topics/spectral-eye)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*