# RF Path

> RF propagation loss calculator with multiple prediction models and data export. (iPhone/iPad app by Tom Doherty.)

- Source: https://appshunter.io/ios/app/rf-path/id1350255203 (this page in markdown: same URL + `.md`)
- Developer: [Tom Doherty](https://appshunter.io/developer/1112286724)
- Category: Productivity, Reference
- Price: $2.99
- Rating: 3.50/5 from 4 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 15 MB
- Languages: American English
- Released: 2018-03-05
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/rf-path/id1350255203/reviews.md

## What is RF Path?

RF Path provides propagation loss calculations for radio frequencies (RF) between 20 MHz and 20 GHz using either the Irregular Terrain model, Okumura-Hata model, COST-231 Hata Extension model, or the COST-231 Walfish-Ikegami model. The calculations are based on both electromagnetic theory and the statistical analysis of terrain characteristics to calculate the degradation of the RF wave as a function of distance and the variability of the RF wave with respect to time and space.

The Irregular Terrain Model has two different prediction models. One is the Area Prediction mode which calculates propagation losses over an area where the exact terrain parameters are not known, but approximated using terrain roughness, environmental parameters and statistical parameters. 

The second is a point-to-point mode where specific latitude/longitude pair values are entered for both transmitter and receiver. Environmental parameters and statistical parameters are also used in this prediction mode.

The results may be saved to iCloud, emailed, or posted to Facebook or Twitter. The results are in CSV format.

In the Area Prediction mode a table along with a graph shows the path loss over the distance entered into the settings. The graph is viewed by rotating the device once the results table is shown.

In the Point-To-Point Prediction mode a table along with a graph shows the path loss and elevation profile of the RF path.

## Key features

- Multiple propagation models (Irregular Terrain, Okumura-Hata, COST-231)
- Area Prediction mode
- Point-to-Point prediction mode
- Elevation profile display
- Results export (CSV)
- Save to iCloud
- Share to social media

## Chart rankings

- #192 in Top Paid · Productivity (US App Store)

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/rf-path/id1350255203/reviews.md

### 3/5 — Great except area notes

*2024-10-28*

Everything on point to point is great and straightforward. I can’t get the area model to work even after selecting help and some of helps instructions make no sense as the input is not available. I think something is wrong.

### 2/5 — Broken.

*2020-07-26*

Just purchased. It crashes every time I try to calculate. What a shame.

### 5/5 — Provides the propagation loss calculation I need

*2019-08-03*

The app provides the RF path loss for me to enter into my analysis between a transmitter and receiver. I especially like the fact that the propagation calculations take into account near earth effects since I work with systems that are placed on the ground. It’s also great that the loss calculations are not based on free space loss. It would be nice to be able to save the coordinates for different paths that I work.

### 4/5 — Great Propagation Estimation Tool

*2019-08-03*

I have worked with RF systems for more than 20 years. It’s great to have an app I can use to make propagation calculations that not only takes into account the terrain between the transmitter and receiver but also allows me to set the ground parameters based on the area of the world I am working. Only 4 stars because the results graph is sometimes too busy.

## Frequently asked questions about RF Path

### What RF Path models are available for propagation loss calculations?

RF Path offers calculations using the Irregular Terrain model, Okumura-Hata model, COST-231 Hata Extension model, and the COST-231 Walfish-Ikegami model.

### Can RF Path calculate propagation loss over specific terrain?

Yes, RF Path has a Point-to-Point prediction mode where you can enter specific latitude/longitude pairs for the transmitter and receiver to calculate path loss and elevation profiles.

### How can I share my RF Path calculation results?

Results from RF Path can be saved to iCloud, emailed, or posted directly to Facebook or Twitter in CSV format.

### What devices is RF Path compatible with?

RF Path is available for Mac, iPhone, iPad, and iPod devices.

### How often is RF Path updated?

The latest version, 3.52, was released on May 5, 2024. Updates are generally frequent, ensuring the app stays current.

### What is the user rating for RF Path?

RF Path has an average rating of 3.5 stars based on 4 user ratings.

### Does RF Path have ads?

No, RF Path does not contain advertisements.

### What is the age rating for RF Path?

RF Path is rated 4+ for age appropriateness.

## Version history (last 5 releases)

### 3.52 — 2024-05-05

- Fixed ITM upper frequency limit
- Bug fixes

### 3.51 — 2021-10-11

- Added support for iOS 15
- Bugs fixes

### 3.5 — 2021-09-14

- This version added three propagation models
     - Okumura-Hata
     - COST-231 Hata Extension
     - COST-231 Walfish-Ikegami. 
- The option to display maximum range rings around the transmitter and receiver site locations were added.
Corrected bugs.

### 3.0 — 2021-04-25

Version 3.0 adds: 
- Path model includes entering EIRP and receive system sensitivity to determine overall RSSI.
- Detailed information for each point in the propagation path
- Rain region affects (ITU and Crane rain fade models)
- Decimal latitude/longitude, Degrees/Minutes/Seconds (DMS), Universal Transverse Mercator (UTM), Military Grid Reference System (MGRS) coordinate systems
- Map search by address, location name, or coordinates (Lat/Lon, DMS, UTM, MGRS).
- Ability to edit site locations
- Display of calculated propagation noise floor
- Bit Error Rate (BER) threshold selection
- Modulation selection

### 2.3 — 2020-04-24

Version 2.3 adds
    - Bug fixes
    - Support for Dark Mode
    - User Interface improvements
    - Added launch screen

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## More apps by Tom Doherty

- [Just A Calc](https://appshunter.io/ios/app/just-a-calc/id1112349564)
- [Path Trex](https://appshunter.io/ios/app/path-trex/id6443819443)

All apps by Tom Doherty: https://appshunter.io/developer/1112286724

## Related topics

[tom doherty](https://appshunter.io/ios/topics/tom-doherty) · [doherty](https://appshunter.io/ios/topics/doherty)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*