# Wavelength Calculator vs ProPi System Analyzer

The clearest difference is price: Wavelength Calculator at $2.99 against ProPi System Analyzer's $19.99. Wavelength Calculator also leads on device support (3 vs 1) and iOS requirement (13 vs 17.0). ProPi System Analyzer's advantage is update cadence (every 5 days vs every 30 months). On ads and in-app purchases there is nothing between them.

Wavelength Calculator costs $2.99 and ProPi System Analyzer $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Wavelength Calculator ships an update every 30 months, ProPi System Analyzer every 5 days. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Wavelength Calculator | ProPi System Analyzer |
| --- | --- | --- |
| Price | **$2.99** | $19.99 |
| Rating | **[2.6 (5 ratings)](https://appshunter.io/ios/app/wavelength-calculator/id1413070800/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 5 days** |
| Monetization | Paid | — |
| Size | 1 MB | 59 MB |
| Requires iOS | **13** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Anh Viet Do](https://appshunter.io/developer/6811894471) |

## What reviewers say

### Wavelength Calculator

[App page](https://appshunter.io/ios/app/wavelength-calculator/id1413070800)

This physics and math tool quickly calculates wave properties like wavelength and frequency. It supports various units, high precision, and allows results to be copied to other applications. The app is lightweight, ad-free, and designed with privacy in mind.

**Highlights:** Instant calculations, Copyable results, Included formulas, High precision (16 decimal places), Multiple unit support, Ad-free and private

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

**In-app purchases:** none


### ProPi System Analyzer

[App page](https://appshunter.io/ios/app/propi-system-analyzer/id6811894469)

**In-app purchases:** none


## Frequently asked questions

### Is Wavelength Calculator free?

Wavelength Calculator costs $2.99, with no in-app purchases.

### Is ProPi System Analyzer free?

ProPi System Analyzer costs $19.99, with no in-app purchases.

### Do Wavelength Calculator or ProPi System Analyzer have ads?

Neither Wavelength Calculator nor ProPi System Analyzer shows ads.

### Which is updated more often, Wavelength Calculator or ProPi System Analyzer?

Wavelength Calculator ships an update every 30 months, and ProPi System Analyzer every 5 days. Most recently, Wavelength Calculator was updated on November 2, 2026 and ProPi System Analyzer on November 3, 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.*