Comparison

RST Scope Pro vs RS

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RST Scope Pro

Read full description

This is an app for amateur radio operators with a narrow band of audio frequency, spectrum scope & waterfall display. You can get a rich display by microphone inputting the speaker output of a radio that does not have a spectrum scope or waterfall function. The FFT allows you to distinguish between the dot and dash of Morse code. [function] 1. Ability to change the speed of the waterfall 2. Ability to adjust the level of audio input 3. Function to switch the display band between wide and narrow 4. Display pause function (pause / cancel by touching the screen) 5. Display scaling for iPhone Display size. 6. Function to switch frequency resolution.(40Hz/20Hz/10Hz) 7. Function to switch between bar graph and line graph 8. Function to switch the cross hatch ON / OFF by longTap 9. Function to switch the USB/LSB by Left/Right Swipe 10.Recording/Playback function of Input Sound 11.File Listing function RST Scope(Free) https://www.youtube.com/watch?v=1s9RvOFp52g

About

RS

This app expands D-STAR transceiver capabilities over the internet using Terminal or Access Point modes. It allows communication even outside of repeater range by routing signals through your device via cellular or Wi-Fi networks.

Highlights
  • Terminal mode for internet-based transceiver communication
  • Access Point mode to function as a Wireless LAN access point
  • Expands D-STAR capabilities beyond repeater range
  • Utilizes internet, LTE, or 5G networks for signal transmission
  • Requires public IP address for gateway operation
Features
Read full description

[Features] The RS-MS3I is an iPhone or iPad application designed to expand the DV mode capability of a D-STAR transceiver using a Terminal or an Access Point mode. These modes enable D-STAR operations by sending signals from the D-STAR transceiver over the Internet, even when that transceiver is out of the range of a D-STAR repeater. The transceiver sends your voice signals using an Internet, LTE, or 5G network, through an iPhone or iPad. 1. Terminal mode By operating the D-STAR transceiver through the iPhone or iPad, you can contact other D-STAR transceivers. In the Terminal mode, the transceiver will not transmit an RF signal, even if [PTT] is held down, because the microphone audio signal is transmitted through an Internet, LTE, or 5G network. 2. Access Point mode In this mode, the D-STAR transceiver functions as a Wireless LAN access point. The D-STAR transceiver repeats the received signal from the iPhone or iPad, to other D-STAR transceivers. Refer to the instruction manual (PDF) for setting details. The instruction manual can be downloaded from the ICOM website. (URL: https://www.icomjapan.com/support/manual/) [Device requirements] iOS15 or later [Usable transceivers] (As of March 2026) - ID-52A PLUS or ID-52E PLUS Note: - This application operates on iPhone or iPad as a gateway server on the D-STAR system. Therefore, a public IP address must be set on either the iPhone, iPad, or the Wireless LAN router. - Ask your mobile carrier or ISP for a public IP address. According to the contract, communication charges and/or communication packet limits may occur. - Ask your mobile carrier, ISP, or manufacturer of your iPhone, iPad, or router about public IP setting details. - Icom does not guarantee that the RS-MS3I works on all iPhone and iPad. It may not work properly, depending on the OS version, installed applications, or other reasons. - When a Bluetooth headset is connected to the transceiver, depending on the combination of your iPhone or iPad and the Bluetooth headset, sound may be interrupted, and communication may not be possible. In such cases, please disconnect the Bluetooth headset before use. - Turn OFF the Wireless LAN function when communicating through an LTE or 5G network. - Operate your transceiver with the RS-MS3I in compliance with appropriate regulations. - Icom recommends that you operate them with a club station license.

Screenshots

RST Scope Pro4 screens
RS4 screens

Verdict

The call

The clearest difference is price: RS at Free against RST Scope Pro's $1.99. RST Scope Pro's advantage is update cadence (every 6 days vs every 4 months). On ads, in-app purchases, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

RS is free to download; RST Scope Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

RST Scope Pro ships an update every 6 days, RS every 4 months. The most recent releases landed on March 12, 2026 and September 2, 2026 respectively.

Scorecard2 real differences · 8 level
RST Scope Pro versus RS: the parameters behind the verdict, then further details
ParameterRST Scope ProRS
Price$1.99Free — better
Rating3.0 (3 ratings) — better
Positive reviews14.3% of reviews
Number of ratings3 — better
Update frequencyEvery 6 days — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.615.0 — better
Further details — not scored
Size1 MB2 MB
Age rating4+4+
Developerkoji kamogawaICOM INCORPORATED

In-app purchases

None

RST Scope Pro

No in-app purchases

None

RS

No in-app purchases

Questions

Is RST Scope Pro free?
RST Scope Pro costs $1.99, with no in-app purchases.
Is RS free?
RS is free to download, with no in-app purchases.
Do RST Scope Pro or RS have ads?
Neither RST Scope Pro nor RS shows ads.
Which is updated more often, RST Scope Pro or RS?
RST Scope Pro ships an update every 6 days, and RS every 4 months. Most recently, RST Scope Pro was updated on March 12, 2026 and RS on September 2, 2026.

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