dB Calculator vs Ham2K Portable Logger
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
dB Calculator
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.
- 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
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The dBCalculator software comprises five independent calculation tools: dBm Calculator: This tools helps to add and subtract an arbitrary number of power levels expressed in units of dBm and watt. Voltage Calculator: This tools helps to add and subtract correlated and uncorrelated voltage levels. Unit Converter: This tool calculates for an entry using a unit such as dBm, dBW, mW, W, mV, V, dBV, dBµV and dBu the corresponding values for all other units, for individual impedance values. dB Converter: This tool converts linear power and voltage ratios to dB and vice versa. VSWR Converter: This tool converts reflection quantities such as Voltage Standing Wave Ratio VSWR, reflection coefficient, reflected power, return loss and mismatch loss. PLEASE NOTE: Calculations based on correlated vs uncorrelated levels yield very different results. If you see an unexpected result, please verify the uncorrelated/correlated setting of this app first! The dBCalculator software is based on the application note 1GP77: R&S dBCalculator by Rohde & Schwarz GmbH & Co. KG www.rohde-schwarz.com/appnote/1GP77
Ham2K Portable Logger
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.
- 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
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The best app to log your QSOs on the go. Support for Parks On The Air (POTA), Summits On The Air (SOTA), Field Day, Winter Field Day, Worldwide Flora and Fauna (WWFF) and more. Fast and efficient yet fully-featured: QRZ.com name lookups, QSO Maps, offline data files, contact rates, duplicate warnings, POTA spots, search parks nearby or by name, etc. See https://www.ham2k.com/legal/terms-of-service/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | dB Calculator | Ham2K Portable Logger |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (3 ratings) | 4.7 (61 ratings) — better |
| Positive reviews | 42.9% of reviews | 86.5% of reviews — better |
| Number of ratings | 3 | 61 — better |
| Update frequency | Every 5 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 37 MB | 110 MB |
| Age rating | 4+ | 4+ |
| Developer | Rohde & Schwarz GmbH & Co. KG | Sebastian Delmont |
Customer experience
dB Calculator
Ham2K Portable Logger
In-app purchases
dB Calculator
No in-app purchases
Ham2K Portable Logger
- Ham2K Log Filer - Monthly$2.991 Month
- Ham2K Log Filer - Annual$24.991 Year
- Show a bit of support…2 variants$4.99
- Show your support!$12.99
- Show your support!$14.99
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- Show a lot of support!!!2 variants$29.99
Questions
Is dB Calculator free?
Is Ham2K Portable Logger free?
Which has better reviews, dB Calculator or Ham2K Portable Logger?
Do dB Calculator or Ham2K Portable Logger have ads?
Which is updated more often, dB Calculator or Ham2K Portable Logger?
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