# RF Link Calc vs TheTreeApp SA

The clearest difference is price: TheTreeApp SA at Free against RF Link Calc's $2.99. TheTreeApp SA also leads on update cadence (every 2 months vs every 40 months) and rating (2.7 vs 2.3). RF Link Calc's advantage is in-app purchases (none vs 5) and iOS requirement (9.0 vs 16.0). On ratings volume, ads and device support there is nothing between them.

TheTreeApp SA is free to download; RF Link Calc costs $2.99 up front. TheTreeApp SA sells 5 in-app purchases, starting at $6.99 per year. RF Link Calc asks for nothing beyond the download.

TheTreeApp SA holds the better App Store score, 2.7 against 2.3. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews point the same way: 20% of RF Link Calc's written reviews are positive against 33% of TheTreeApp SA's.

RF Link Calc ships an update every 40 months, TheTreeApp SA every 2 months. The most recent releases landed on October 21, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | RF Link Calc | TheTreeApp SA |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/rf-link-calc/id303034300/reviews) | **[2.7 (3 ratings)](https://appshunter.io/ios/app/thetreeapp-sa-tree-identifier/id1235289410/reviews)** |
| Number of ratings | 3 | 3 |
| Positive reviews | 20.0% of reviews | **33.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 4 MB | 1.4 GB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [High Branching cc](https://appshunter.io/developer/1235289409) |

## What reviewers say

### RF Link Calc

[App page](https://appshunter.io/ios/app/rf-link-calc/id303034300)

This tool helps radio engineers calculate RF link characteristics, including wireless internet links. It computes maximum distance, required transmitter power, or gain margin by inputting various parameters. It also calculates EIRP, ERP, and field strength in multiple units.

**Highlights:** RF link modeling, Wireless internet link calculations, Maximum distance computation, Transmitter power calculation, Gain margin calculation, EIRP/ERP calculator, Field strength calculator

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

**In-app purchases:** none


### TheTreeApp SA

[App page](https://appshunter.io/ios/app/thetreeapp-sa-tree-identifier/id1235289410)

Identify over 1200 South African trees using detailed descriptions, artwork, and photographs. Search by scientific or common name in 11 languages, or use interactive location and random search functions. An evaluation version is available, with a yearly subscription unlocking the full database and two versions of the app.

**Highlights:** Identify over 1200 South African trees, Detailed species descriptions, Artwork and over 6000 photographs, Search by scientific/common name, Search in 11 South African languages, Interactive location-based search, Random Tree Search function, Offline functionality after initial download

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TheTreeAppAddOn | $6.99 | per year |
| TreeProBotAddOn | $6.99 | per year |
| TheTreePro SA | $8.99 | per year |
| TheTreeApp | $9.99 | per year |
| TreeProBot | $9.99 | per year |


## Frequently asked questions

### Is RF Link Calc free?

RF Link Calc costs $2.99, with no in-app purchases.

### Is TheTreeApp SA free?

TheTreeApp SA is free to download, with in-app purchases available.

### Which has better reviews, RF Link Calc or TheTreeApp SA?

TheTreeApp SA is rated higher. RF Link Calc averages 2.3 out of 5 from 3 ratings, while TheTreeApp SA averages 2.7 from 3 ratings.

### Do RF Link Calc or TheTreeApp SA have ads?

Neither RF Link Calc nor TheTreeApp SA shows ads.

### Which is updated more often, RF Link Calc or TheTreeApp SA?

RF Link Calc ships an update every 40 months, and TheTreeApp SA every 2 months. Most recently, RF Link Calc was updated on October 21, 2026 and TheTreeApp SA on October 30, 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.*