Comparison

Selcall Selective Calling Tone vs CL650 CMS Crew Application

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

Head to head
About

Selcall Selective Calling Tone

Generate various selective calling tones for communication. Choose from over 20 tone types, queue multiple tones for burst transmission, and customize tone durations and gaps. Store frequently used sequences for quick access.

Highlights
  • Over 20 tone types
  • Tone queuing and burst transmission
  • Customizable tone duration and gap
  • Memory for storing tone sequences
  • CTCSS continuous tone generation
  • CODAN mode for priority calls
Features
Read full description

SelCall generates Selective Calling Tones. Select your tone type from the extensive selection of available modes, then touch the button for each tone you wish to send. You can even queue up tones and have them sent in a burst, if you wish. The following tone types can be generated: DTMF CCIR1 CCIR7 PCCIR EIA EEA CCITT EURO NATEL VDEW MODAT ZVEI1 ZVEI2 ZVEI3 PZVEI DZVEI PDZVEI ICAO ICAO SELCALL 32 CTCSS CODAN Touch the button on the upper right corner to get a list of SelCall tone modes, and select the mode you wish to use. Then touch the button for each tone you wish to generate. If you turn the switch off, you can queue up several tones (they will be displayed to the left of the switch) and then turn the switch back on to play them. Any tones that you played by turning the switch on can be repeated by tapping the RPT/Repeat button. You can also store commonly used tone sequences. Tap on the Mem button to bring of the list of memory entries, which will by empty at first. To add an entry, tap the Edit button, then the green plus sign to add an entry, which will get a default name of Untitled. Tap Done, then tap on the Untitled entry to edit it. You can change the name, as well as the tone keys to be sent. To send an entry, tap the send button. It will be sent (or stored in the buffer if the switch is off). It will also be placed in the repeat buffer, so you can tap RPT/Repeat to re-send it. The duration of tones and gap between them can be customized for most modes. Enter the values in milliseconds. The maximum allowed values are 500 milliseconds. In CTCSS mode, touch the button for the tone that you wish to continuously generate. There is a switch which turns the tone on and off, and when on, the tone will continuously play, even when you switch to another tone mode, so you can combine CTCSS with other tone modes. In CODAN mode, adjust the center frequency if necessary, select the priority of the message, and dial in the ID to call, and your ID. Then tap Send. Sequence mode allows you to create sequences of arbitrary tones. First, you will see a list of your sequences. You can use Edit to add additional sequences, delete a sequence, or re-arrange them. Three sample tone sequences are created for you, as examples. To rename a sequence, tap on it and edit the text. To edit to send a sequence, tap on the disclosure indicator at the extreme right. Each sequence is a set of lines, each of which has two numbers. The first is the frequency of the tone in Hertz, the second is the duration of the tone in milliseconds. One second is 1,000 milliseconds. Do not put an additional space between the numbers, after them, before them, or use any other characters, or the sequence will not correctly play. You can play two tones at the same time, in that case, three numbers must be entered on each line, the first two are the tone frequencies, the third is the duration. The first sample sequence, Seq 1, sends eight tones. The first is 1200 Hz for 550 milliseconds, then there are six more tones: 1100, 1000, 1100, 1000, 1100, 1000 Hz, each 200 milliseconds. Then a final tone of 1500 Hz for 350 milliseconds. To play a sequence, tap Send. To edit a line, tap on it and edit the text. You need a single space between the frequency and length. You can use Edit to add additional lines, delete a line, or re-arrange them.

About

CL650 CMS Crew Application

Features
Read full description

The "CL650 Crew App" App provides you as a flight crew on the Challenger 650 with a very handy and intuitive remote control interface for your aircraft cabin system. It lets you control all aspects of the business jet cabin environment directly from your iPad Electronic Flight Bag via the onboard Wireless LAN. In addition it allows you to control briefing playback and override light settings in the cabin. The App turns your personal device into a fully-fledged wireless controller for the niceHD(R) system. *** ATTENTION *** The "CL650 Crew App" App is only useable on Bombardier Challenger 650 Business Jets that have Lufthansa Technik's niceHD(R) Cabin Management System installed. Without a correctly configured niceHD(R) system the "CL650 Crew App" will not provide any functions! For further information please contact Lufthansa Technik. *** ATTENTION ***

Screenshots

Selcall Selective Calling Tone4 screens

Verdict

The call

The clearest difference is price: CL650 CMS Crew Application at Free against Selcall Selective Calling Tone's $2.99. Selcall Selective Calling Tone's advantage is update cadence (every 4 months vs every 14 months) and device support (3 vs 1). On ads, in-app purchases 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

CL650 CMS Crew Application is free to download; Selcall Selective Calling Tone costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Selcall Selective Calling Tone ships an update every 4 months, CL650 CMS Crew Application every 14 months. The most recent releases landed on September 26, 2026 and September 8, 2026 respectively.

Scorecard3 real differences · 7 level
Selcall Selective Calling Tone versus CL650 CMS Crew Application: the parameters behind the verdict, then further details
ParameterSelcall Selective Calling ToneCL650 CMS Crew Application
Price$2.99Free — better
Rating3.2 (14 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings14 — better—
Update frequencyEvery 4 months — betterEvery 14 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS12.0 — better12.1
Further details — not scored
Size2 MB34 MB
Age rating4+4+
DeveloperBlack Cat SystemsLufthansa Technik AG - Innovation

In-app purchases

None

Selcall Selective Calling Tone

No in-app purchases

None

CL650 CMS Crew Application

No in-app purchases

Questions

Is Selcall Selective Calling Tone free?
Selcall Selective Calling Tone costs $2.99, with no in-app purchases.
Is CL650 CMS Crew Application free?
CL650 CMS Crew Application is free to download, with no in-app purchases.
Do Selcall Selective Calling Tone or CL650 CMS Crew Application have ads?
Neither Selcall Selective Calling Tone nor CL650 CMS Crew Application shows ads.
Which is updated more often, Selcall Selective Calling Tone or CL650 CMS Crew Application?
Selcall Selective Calling Tone ships an update every 4 months, and CL650 CMS Crew Application every 14 months. Most recently, Selcall Selective Calling Tone was updated on September 26, 2026 and CL650 CMS Crew Application on September 8, 2026.

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