# Light Spectrometer Wavelength vs Any Formula

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.

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.

## The numbers

| Metric | Light Spectrometer Wavelength | Any Formula |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (96 ratings)](https://appshunter.io/ios/app/light-spectrometer-wavelength/id6450930820/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/any-formula/id6761690225/reviews)** |
| Number of ratings | **96** | 2 |
| Positive reviews | 70.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 43 MB | 3 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Contechity AB](https://appshunter.io/developer/1649290454) | [Aihotey LLC](https://appshunter.io/developer/1890912802) |

## What reviewers say

### Light Spectrometer Wavelength

[App page](https://appshunter.io/ios/app/light-spectrometer-wavelength/id6450930820)

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.

**Highlights:** Measures dominant wavelength (nm), Measures frequency (THz), Measures period length (fs), Real-time measurement, Save measurements with notes, Optional calibration

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $0.99 | per month |
| Full access | $0.99 | per month |
| Full access | $4.99 | per year |
| Full access | $6.99 | one-time |


### Any Formula

[App page](https://appshunter.io/ios/app/any-formula/id6761690225)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Any Formula Pro | $2.99 | one-time |


## Frequently asked questions

### Is Light Spectrometer Wavelength free?

Light Spectrometer Wavelength is free to download, with in-app purchases available.

### Is Any Formula free?

Any Formula is free to download, with in-app purchases available.

### Which has better reviews, Light Spectrometer Wavelength or Any Formula?

Any Formula is rated higher. Light Spectrometer Wavelength averages 4.2 out of 5 from 96 ratings, while Any Formula averages 5.0 from 2 ratings.

### Do Light Spectrometer Wavelength or Any Formula have ads?

Neither Light Spectrometer Wavelength nor Any Formula shows ads.

### Which is updated more often, Light Spectrometer Wavelength or Any Formula?

Light Spectrometer Wavelength ships an update every 2 months, and Any Formula monthly. Most recently, Light Spectrometer Wavelength was updated on October 27, 2026 and Any Formula on October 14, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*