# Wavelength Calculator vs Propagation Tools

The clearest difference is update cadence: Propagation Tools at every 9 months against Wavelength Calculator's every 30 months. Propagation Tools also leads on price ($0.29 vs $2.99). Wavelength Calculator's advantage is iOS requirement (13 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

Wavelength Calculator costs $2.99 and Propagation Tools $0.29 up front. Neither carries in-app purchases, so what you see is what you pay.

Wavelength Calculator ships an update every 30 months, Propagation Tools every 9 months. The most recent releases landed on October 8, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Wavelength Calculator | Propagation Tools |
| --- | --- | --- |
| Price | $2.99 | **$0.29** |
| 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 9 months** |
| Monetization | Paid | — |
| Size | 1 MB | 1 MB |
| Requires iOS | **13** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Jeff Curtis](https://appshunter.io/developer/358219019) |

## 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


### Propagation Tools

[App page](https://appshunter.io/ios/app/propagation-tools/id6446221936)

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

**In-app purchases:** none


## Frequently asked questions

### Is Wavelength Calculator free?

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

### Is Propagation Tools free?

Propagation Tools costs $0.29, with no in-app purchases.

### Do Wavelength Calculator or Propagation Tools have ads?

Neither Wavelength Calculator nor Propagation Tools shows ads.

### Which is updated more often, Wavelength Calculator or Propagation Tools?

Wavelength Calculator ships an update every 30 months, and Propagation Tools every 9 months. Most recently, Wavelength Calculator was updated on October 8, 2026 and Propagation Tools on October 27, 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.*