# dB Calculator vs RF toolbox

The clearest difference is in-app purchases: dB Calculator at none against RF toolbox's 1. dB Calculator also leads on iOS requirement (10.0 vs 13.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. RF toolbox sells 1 one-off in-app purchase. dB Calculator asks for nothing beyond the download.

dB Calculator ships an update every 5 months, RF toolbox every 6 months. The most recent releases landed on September 11, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | dB Calculator | RF toolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/db-calculator/id489100786/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 6 months |
| Monetization | Free | — |
| Size | 37 MB | 28 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rohde & Schwarz GmbH & Co. KG](https://appshunter.io/developer/364229795) | [Anas Abubakar](https://appshunter.io/developer/1581534101) |

## What reviewers say

### dB Calculator

[App page](https://appshunter.io/ios/app/db-calculator/id489100786)

This app provides five distinct calculation tools for power levels, voltage, and signal reflection. It helps convert between various units like dBm, watt, and dB, and calculate VSWR and reflection coefficients.

**Highlights:** dBm and watt power level calculations, Correlated and uncorrelated voltage calculations, Unit conversion for dBm, dBW, mW, W, mV, V, dBV, dBµV, dBu, Linear power/voltage ratios to dB conversion, VSWR, reflection coefficient, and mismatch loss calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### RF toolbox

[App page](https://appshunter.io/ios/app/rf-toolbox-electronics/id6757265018)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| upgrade to pro | $3.99 | one-time |


## Frequently asked questions

### Is dB Calculator free?

dB Calculator is free to download, with no in-app purchases.

### Is RF toolbox free?

RF toolbox is free to download, with in-app purchases available.

### Do dB Calculator or RF toolbox have ads?

Neither dB Calculator nor RF toolbox shows ads.

### Which is updated more often, dB Calculator or RF toolbox?

dB Calculator ships an update every 5 months, and RF toolbox every 6 months. Most recently, dB Calculator was updated on September 11, 2026 and RF toolbox on September 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.*