# dB Calculator vs Ham2K Portable Logger

The clearest difference is review sentiment: Ham2K Portable Logger at 86% against dB Calculator's 43%. Ham2K Portable Logger also leads on rating (4.7 vs 4.3) and update cadence (monthly vs every 5 months). dB Calculator's advantage is in-app purchases (none vs 8) and iOS requirement (10.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Ham2K Portable Logger sells 6 in-app purchases, starting at $2.99 per month. dB Calculator asks for nothing beyond the download.

Ham2K Portable Logger holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Ham2K Portable Logger has 61 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 43% of dB Calculator's written reviews are positive against 86% of Ham2K Portable Logger's.

dB Calculator ships an update every 5 months, Ham2K Portable Logger monthly. The most recent releases landed on October 16, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | dB Calculator | Ham2K Portable Logger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (3 ratings)](https://appshunter.io/ios/app/db-calculator/id489100786/reviews) | **[4.7 (61 ratings)](https://appshunter.io/ios/app/ham2k-portable-logger/id6478713938/reviews)** |
| Number of ratings | 3 | **61** |
| Positive reviews | 42.9% of reviews | **86.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 37 MB | 110 MB |
| Requires iOS | **10.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rohde & Schwarz GmbH & Co. KG](https://appshunter.io/developer/364229795) | [Sebastian Delmont](https://appshunter.io/developer/1722132623) |

## 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


### Ham2K Portable Logger

[App page](https://appshunter.io/ios/app/ham2k-portable-logger/id6478713938)

Log your amateur radio contacts (QSOs) efficiently while on the go. Supports popular operating events like POTA, SOTA, and Field Day, offering features like QRZ lookups, QSO maps, and offline data. Quickly find nearby parks and receive duplicate warnings.

**Highlights:** Log QSOs on the go, Support for POTA, SOTA, Field Day, QRZ.com name lookups, QSO Maps, Offline data files, Duplicate QSO warnings, Search nearby parks

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ham2K Log Filer - Monthly | $2.99 | per month |
| Ham2K Log Filer - Annual | $24.99 | per year |
| Show a bit of support… | $4.99 | one-time |
| Show your support! | $12.99 | one-time |
| Show your support! | $14.99 | one-time |
| Show a lot of support!!! | $29.99 | one-time |


## Frequently asked questions

### Is dB Calculator free?

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

### Is Ham2K Portable Logger free?

Ham2K Portable Logger is free to download, with in-app purchases available.

### Which has better reviews, dB Calculator or Ham2K Portable Logger?

Ham2K Portable Logger is rated higher. dB Calculator averages 4.3 out of 5 from 3 ratings, while Ham2K Portable Logger averages 4.7 from 61 ratings.

### Do dB Calculator or Ham2K Portable Logger have ads?

Neither dB Calculator nor Ham2K Portable Logger shows ads.

### Which is updated more often, dB Calculator or Ham2K Portable Logger?

dB Calculator ships an update every 5 months, and Ham2K Portable Logger monthly. Most recently, dB Calculator was updated on October 16, 2026 and Ham2K Portable Logger on October 19, 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.*