Field Strength Estimator vs Ham2K Portable Logger
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Field Strength Estimator
This app estimates field strength and power flux density based on transmitted power, frequency, and antenna gain. It calculates received power at a receiver and automatically converts power flux density to electric and magnetic field strength. It provides theoretical best-case values, not accounting for real-world propagation impairments.
- Calculates power flux density
- Estimates electric and magnetic field strength
- Calculates received power
- Considers antenna gain and transmitted power
- Assumes theoretical best-case conditions
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The program Field Strength and Power Estimator calculates power flux density, electric and magnetic field strength from the transmitted power, associated frequency and gain of the transmitting antenna. Additionally the input power into a receiver with 50 Ohm input impedance is calculated from the gain of the receiving antenna. The program automatically converts power flux density into electric and magnetic field strength. Depending on the transmitted frequency, various parameters influence the received power and field strength, such as non-line-of-sight propagation, changes in polarisation, reflections, and multi-path propagation affect the true values. Additionally antenna VSWR and cable losses have to be considered. The program Field Strength and Power Estimator does not consider these impairments. It assumes conditions, that are close to the best possible theoretical values. This is why we say the program is an Estimator, not a Calculator. This application is based on the application note: "1MA85: Field Strength and Power Estimator" by Rohde & Schwarz GmbH & Co. KG ( http://www.rohde-schwarz.com/appnote/1MA85 )
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 in-app purchases: Field Strength Estimator at none against Ham2K Portable Logger's 8. Field Strength Estimator also leads on review sentiment (100% vs 86%) and iOS requirement (8.0 vs 15.1). Ham2K Portable Logger's advantage is update cadence (monthly vs every 13 months) and rating (4.7 vs 4.3). 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. Field Strength Estimator 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 4, so its average is the more settled of the two. Written reviews complicate that: 100% of Field Strength Estimator's written reviews are positive against 86% of Ham2K Portable Logger's, so the app with the better star average is not the one people write more warmly about.
Field Strength Estimator ships an update every 13 months, Ham2K Portable Logger monthly. Both last shipped on October 23, 2026.
| Parameter | Field Strength Estimator | Ham2K Portable Logger |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (4 ratings) | 4.7 (61 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 86.5% of reviews |
| Number of ratings | 4 | 61 — better |
| Update frequency | Every 13 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 | 8.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 72 MB | 110 MB |
| Age rating | 4+ | 4+ |
| Developer | Rohde & Schwarz GmbH & Co. KG | Sebastian Delmont |
Customer experience
Field Strength Estimator
Ham2K Portable Logger
In-app purchases
Field Strength Estimator
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 Field Strength Estimator free?
Is Ham2K Portable Logger free?
Which has better reviews, Field Strength Estimator or Ham2K Portable Logger?
Do Field Strength Estimator or Ham2K Portable Logger have ads?
Which is updated more often, Field Strength Estimator or Ham2K Portable Logger?
Other comparisons
