# RF Link — Signal Strength, LOS — Path loss, Fresnel, coverage

> Path loss, Fresnel, coverage (iPhone/iPad app by Yogesh Yadav.)

- Source: https://appshunter.io/ios/app/rf-link-signal-strength-los/id6800277485 (this page in markdown: same URL + `.md`)
- Developer: [Yogesh Yadav](https://appshunter.io/developer/6800277487)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 47 MB
- Languages: American English, Afrikaans, Albanian, Amharic, Arabic, Armenian, Azerbaijani, Basque, Bangla, Bulgarian and 58 more
- Released: 2026-08-17
- Data updated: 2026-09-22
- User reviews in markdown: https://appshunter.io/ios/app/rf-link-signal-strength-los/id6800277485/reviews.md

## What is RF Link?

RF Link brings professional-grade RF path, radio line-of-sight, Fresnel zone and path-loss analysis to your iPhone, using the Longley-Rice (ITM) irregular terrain propagation model. Built for telecom engineers, RF planners, broadcasters and wireless network designers, it delivers accurate point-to-point link evaluation for frequencies from 20 MHz to 20 GHz.

Whether you are planning microwave links, Wi-Fi backhaul, LOS radio links or long-distance wireless communication, RF Link predicts terrain impact, path loss and link feasibility in seconds.

KEY FEATURES

ITM Longley-Rice model (20 MHz - 20 GHz)
- Industry-standard Irregular Terrain Model
- Accurate diffraction, scatter and line-of-sight predictions
- Multiple reliability and confidence combinations

Radio line-of-sight analysis
- Geometric LOS check
- Earth-curvature LOS with adjustable k-factor
- 60% first Fresnel zone clearance
- Minimum clearance at obstruction points
- Suggested tower height increase

Terrain elevation profiling
- High-resolution elevation sampling
- Plots showing terrain, curvature, LOS and Fresnel zones
- Zoomable charts you can share

Coverage heatmap
- Signal-strength coverage area around a transmitter
- Rendered over real terrain on the map

Path loss and link budget
- Path-loss prediction
- EIRP, RSSI, SNR and link margin
- Clear pass, warning and fail indicators

Clean, fast interface
- Map-based transmitter and receiver selection
- PDF report export
- Plot image sharing and saving

IDEAL FOR
- Wireless network planners
- Microwave and LOS link engineers
- UAV and drone communication designers
- Amateur radio operators
- Students learning RF and propagation models

RF LINK PRO

Every install includes a number of free calculations. RF Link Pro removes the limit, and comes two ways:
- Monthly subscription: unlimited path profiles and coverage maps, billed monthly, renewing automatically.
- Lifetime: a one-time purchase, no subscription.

Payment is charged to your Apple Account at confirmation of purchase. A subscription renews automatically at the same price and period unless it is cancelled at least 24 hours before the end of the current period. Manage or cancel it any time in your Apple Account settings.

Privacy Policy: https://pinchiyadav.github.io/RF_Link_App-privacypolicy/
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| RF Link Pro Monthly | $1.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| RF Link Pro Lifetime | $6.99 | one-time |



## Version history (last 4 releases)

### 3.0.3 — 2026-09-18

Fixed purchases and subscriptions, prevented trial credits from resetting after reinstall, and improved update prompts and reliability.

### 3.0.2 — 2026-08-21

Fixes and refinements throughout the app.

### 3.0.1 — 2026-08-18

• Move the transmitter or receiver on the map and read its terrain profile for free
• A free calculation is used only when a coverage map or link result is produced for a new link
• Now requires iOS 15 or later

### 2.0.22 — 2026-08-17

No release notes.

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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 2026-09-22.*