Comparison

RS vs Vernier

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

Head to head
About

RS

Control compatible transceivers, share voice and pictures, and view station locations on a map. Access received station information, send text messages, and manage call sign and repeater lists. Customize transceiver and application settings for a streamlined experience.

Highlights
  • Transceiver DR functions
  • Send and receive voice and pictures
  • Map repeater and station locations
  • Read and edit received station information
  • Send and receive text messages
  • Manage call sign and repeater lists
  • Import/Export data
Features
Read full description

Functional overview of the application DR functions You can use some transceiver’s DR functions. Share pictures Send and receive voice and pictures. Map See the location of repeater sites or other stations on a map using received position data, or your transceiver’s repeater list. Automatically set the transceiver’s “FROM” and “TO” fields by tapping a repeater site or a station on the map. Receive History In the DV mode, read and edit the received station’s information. Download additional information from an Internet database, such as QRZ.com or APRS.fi. Text messaging Send and receive text messages. Call Sign list Edit call signs and names used in the DR function. Also, you can add a call sign and a name in the Call Sign list. Repeater list See the detailed data entered in the Repeater list. Transceiver settings Change some of the transceiver’s function settings. Application settings Select application software settings. Import Import a Repeater list or a Call Sign list. Export Export a Repeater list, a Call Sign list, or Receive History. See the transceiver’s instruction manual for details. The instruction manual can be downloaded from the ICOM web site. Device requirements The RS-MS1I operating requirements are as follows: iOS16 or later Usable transceivers (As of May 2026) - ID-4100A/E + Bluetooth unit (UT-137) - ID-52A or ID-52E *1 - ID-52A PLUS or ID-52E PLUS *2 - ID-5200A or ID-5200E *3 - IC-705 *4 *1 Supported in RS-MS1I Ver.1.1.0 or later. *2 Supported in RS-MS1I Ver.1.3.0 or later. *3 Supported in RS-MS1I Ver.1.4.0 or later. *4 Supported in RS-MS1I Ver.1.2.0 or later. Preparation To use the RS-MS1I with a supported transceiver, you need an optional Bluetooth unit. See your transceiver’s instruction manual for details. Transceiver’s settings Set the following functions as shown below to use the RS-MS1I. [Function] > [CI-V] > [CI-V Transceive]: ON [Bluetooth Set] > [Data Device Set] > [Serial Port Function]: CI-V (Echo back OFF) Note: - The RS-MS1I may not work with all iPhones or iPads, even if they are one of the tested devices. This is because an application program on your device may conflict with the RS-MS1I. - The RS-MS1I may not be used, depending on the OS version, installed application, and so on. - Bluetooth LE is used for the connection with the transceiver, so there may be a time delay between the transceiver’s operation and the display on the iPhone or iPad. - When sending or receiving pictures using “FAST mode,” the headset audio will be temporarily interrupted because of the transceiver’s Bluetooth unit limitations. - You may need to connect to the Internet through a Wireless LAN, an LTE network or a 5G network for some functions. - The RS-MS1I supports only portrait orientation with the iPhone. It does not support Auto Rotate. However, landscape orientation and Auto Rotate are supported with the iPad.

About

Vernier

This application aids in testing visual and tactile acuity using Vernier lines. It also supports Neo Controller calibration and testing for enhanced functionality.

Highlights
  • Visual acuity testing
  • Tactile acuity testing
  • Vernier line display
  • Neo Controller calibration
  • Neo Controller testing
Features
Read full description

Made for testing visual and tactile Vernier acuity, the Vernier App can be used for displaying Vernier Lines with a Neo Controller. The Vernier App can also be used for Neo Controller calibration and testing.

Screenshots

RS4 screens
Vernier3 screens

Verdict

The call

The clearest difference is rating: Vernier at 5.0 against RS's 1.9. Vernier also leads on update cadence (every 3 weeks vs every 8 months) and iOS requirement (14.0 vs 16.0). RS's advantage is ratings volume (75 vs 1). On price, ads, in-app purchases and monetization model 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Vernier holds the better App Store score, 5.0 against 1.9. That said, the two scores are not equally well evidenced: RS has 75 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

RS ships an update every 8 months, Vernier every 3 weeks. The most recent releases landed on September 22, 2026 and June 5, 2026 respectively.

Scorecard4 real differences · 6 level
RS versus Vernier: the parameters behind the verdict, then further details
ParameterRSVernier
PriceFreeFree
Rating1.9 (75 ratings)5.0 (1 ratings) — better
Positive reviews15.6% of reviews—
Number of ratings75 — better1
Update frequencyEvery 8 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.014.0 — better
Further details — not scored
Size34 MB1 MB
Age rating4+4+
DeveloperICOM INCORPORATEDGlobal Tactile, LLC

Customer experience

RS

All ratings74 ratings
Positive18.9%
Neutral8.1%
Negative73.0%
Written reviews64 reviews
Positive15.6%
Neutral6.3%
Negative78.1%

Vernier

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

RS

Reported bugs

29 issues
  • App crashes when using map function
  • App crashes on map screen
  • App closes when opening map
  • Not staying connected to the app
  • Connection unsuccessful error message
Show 24 more
  • Bluetooth pairing not working
  • Connects and immediately disconnects
  • Does not download full repeater list
  • Bluetooth connection fails
  • App crashes when selecting a picture to send
  • Photo import force closes app
  • App bombing out when trying to add a photo
  • Attempting to transfer photos crashes every time
  • Cannot get app to pair
  • App sees radio but won't connect
  • App won't connect
  • Cannot connect app to iPhone
  • ID-52A not pairing
  • App instantly sees device but fails to connect
  • Bluetooth connection does not happen
  • App crashes trying to share photo
  • App picture send capability is INOP
  • App force closes / crashes on photo import
  • Cannot get it to connect on either device
  • App doesn't work with ICOM ID-5100
  • App doesn't work with 4100 on iOS 15
  • App doesn't work with iPhone 6s+
  • Bluetooth connection does not happen after lengthy labours
  • App has not been updated in almost a year

Requested features

12 requests
  • Add support for ID-5100
  • Add support for ID-51A Plus 2
  • Add support for ID-50
  • Add support for IC-705
  • Improve repeater list
Show 7 more
  • Import repeater lists via Files/OneDrive/Dropbox
  • Serial port support via USB
  • Add support for ID-4100A with BT module
  • Add support for IC-2820
  • Update for iOS 15
  • Update for iOS 16
  • Update for iOS 18

Vernier

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

RS

No in-app purchases

None

Vernier

No in-app purchases

Questions

Is RS free?
RS is free to download, with no in-app purchases.
Is Vernier free?
Vernier is free to download, with no in-app purchases.
Which has better reviews, RS or Vernier?
Vernier is rated higher. RS averages 1.9 out of 5 from 75 ratings, while Vernier averages 5.0 from 1 ratings.
Do RS or Vernier have ads?
Neither RS nor Vernier shows ads.
Which is updated more often, RS or Vernier?
RS ships an update every 8 months, and Vernier every 3 weeks. Most recently, RS was updated on September 22, 2026 and Vernier on June 5, 2026.

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