Light Spectrometer Wavelength vs Any Formula
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Light Spectrometer Wavelength
This application analyzes light to determine its dominant wavelength in nanometers, frequency in terahertz, and period length in femtoseconds. It provides real-time measurements and allows users to save their findings with notes. The app is designed for measuring colored light sources.
- Measures dominant wavelength (nm)
- Measures frequency (THz)
- Measures period length (fs)
- Real-time measurement
- Save measurements with notes
- Optional calibration
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Measures light spectrum to determine the dominant wavelength in nm, frequency in THz and period length in fs. DOMINANT WAVELENGTH Dominant wavelength is a concept commonly used in the field of color science and perception. It refers to the wavelength of light that appears most prominent or dominant in a given color mixture or light source. In other words, it is the wavelength that our eyes perceive as the primary color in a mixture of different wavelengths. For light with only one wavelength, such as the light from a colored LED, the dominant wavelength corresponds to the wavelength of that light. KEY FEATURES • High accuracy • Real-time measurement • Measures light wavelength in nanometers (nm) • Measures light frequency in terahertz (Thz) • Measures light period length in femtoseconds (fs) • Easy to use • Save measurements with notes • Supports 40 languages, including english • Optional calibration for enhanced precision MEASURING 1. Find a white surface, such as a plain piece of white paper 2. Point your camera at the surface illuminated by your target light source 3. The app gives you accurate measurements in real-time LIMITATIONS Smartphone cameras have limitations when it comes to distinguishing between different very short, or very long wavelengths. More specifically, on many devices the accuracy below 465 nm and above 610 nm is very limited. This is due to the physical camera sensors in the devices. An automatic warning appears on the screen for these short and long wavelengths. WHITE LIGHT Note that is not meaningful to measure the dominant wavelength of white light as white light consists of a wide range of wavelengths, with no wavelength dominating. This app is made for measuring colored light. If you are interested in determining the color temperature of white light, please instead use our popular White Balance Kelvin Meter app. COLOR OF SURFACES If you want to measure the color of a surface or material, rather than of light, please instead use our popular Colorimeter Camera Color Meter app. Privacy Policy, https://spectrometer.contechity.com/pp.html End User License Agreement, https://spectrometer.contechity.com/eula.html CONTACT I value your feedback. Email me at apps@contechity.com with any suggestions or questions. Download the Spectrometer now!
Any Formula
Access a vast library of scientific, engineering, and financial formulas for instant calculations. Features smart input validation, customizable themes, and privacy-focused data handling. Unlock all formulas and advanced sharing options with a one-time purchase.
- 572 scientific, engineering, financial formulas
- 9 formula categories
- Smart input validation
- Customizable themes (Light, Dark, Auto)
- Favorites and history
- Unit customization and auto-conversion
- Privacy-focused, no tracking
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Any Formula puts 572 scientific, engineering, and financial formulas at your fingertips. From Ohm's Law to compound interest, from Pythagorean theorem to gas laws — calculate anything, anywhere. **9 CATEGORIES** Mathematics, Physics, Electronics, Mechanics, Chemistry, Finance & Business, Statistics, Health & Medical, Computer Science **POWERFUL CALCULATION ENGINE** Enter your values, tap Calculate, and get instant results. Smart input validation ensures your numbers are in the right range before computing. Results are clear, accurate, and ready to share. **FREE FEATURES** - 10 free formulas in every category (90 total) - Search all 572 formulas by name, description, or category - Smart suggestions — tell the app what you're working on - 5 favorites for quick access - 5 saved calculation history records - Auto-detect metric system from your device locale - Light, Dark, or Auto theme - Real-time input validation with range guidance **PRO FEATURES (One-Time Purchase)** - Unlock all 572 formulas — no limits - Share results as text - Export results as image or PDF - Up to 500 favorites and history records - Edit and multi-select delete in history - Unit customization per field with auto-conversion - Related formula suggestions for chained workflows **BUILT FOR EVERYONE** Whether you're a student solving homework, a tradesperson on a job site, an engineer at your desk, or a professional running quick calculations — Any Formula has you covered. **PRIVACY FIRST** All data stays on your device. No accounts. No tracking. No cloud uploads. Your calculations are yours alone.
Screenshots
Verdict
The clearest difference is rating: Any Formula at 5.0 against Light Spectrometer Wavelength's 4.2. Light Spectrometer Wavelength's advantage is ratings volume (96 vs 2) and iOS requirement (15.0 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Light Spectrometer Wavelength sells 4 in-app purchases, starting at $0.99 per month and Any Formula sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Any Formula holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Light Spectrometer Wavelength has 96 ratings behind it against 2, so its average is the more settled of the two.
Light Spectrometer Wavelength ships an update every 2 months, Any Formula monthly. The most recent releases landed on October 27, 2026 and October 14, 2026 respectively.
| Parameter | Light Spectrometer Wavelength | Any Formula |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (96 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 70.6% of reviews | — |
| Number of ratings | 96 — better | 2 |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 43 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Contechity AB | Aihotey LLC |
Customer experience
Light Spectrometer Wavelength
Any Formula
In-app purchases
Light Spectrometer Wavelength
- Full Access7 Days trial$0.991 Month
- Full access14 Days trial$0.991 Month
- Full access$4.991 Year
- Full access4 variants$6.99
Any Formula
- Any Formula Pro$2.99
Questions
Is Light Spectrometer Wavelength free?
Is Any Formula free?
Which has better reviews, Light Spectrometer Wavelength or Any Formula?
Do Light Spectrometer Wavelength or Any Formula have ads?
Which is updated more often, Light Spectrometer Wavelength or Any Formula?
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