Comparison

Selcall Selective Calling Tone vs film Dev Timer

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

film Dev Timer

This app assists film photographers in developing black and white film at home. It provides common development data, timing functions, and developer ratios to ensure stable manual processing for a high-quality result.

Highlights
  • Black and white film development guide
  • Home development timing
  • Developer ratio information
  • Process-specific timing
  • Stable manual processing support
  • iPhone and iPad compatible
Features
Read full description

This is an app developed for film photographers and photography enthusiasts to develop black and white film at home, suitable for iPhone and iPad. With the emergence of the trend of film retro in recent years, more and more friends are playing with film. In order to pursue higher development quality and production speed, more and more players choose to develop their own film at home. This app provides common film development and development data on the market, as well as the function of timing according to the process. You can develop the film according to the established developer ratio, specific time, and specific temperature to ensure the stability of manual processing. If you have any feedback, please email us at: xiliustudio@qq.com 。 Film production has been discontinued one after another. Let's take pictures and cherish them. Wishing everyone a pleasant time playing.

Screenshots

Selcall Selective Calling Tone4 screens
film Dev Timer4 screens

Verdict

The call

The clearest difference is rating: film Dev Timer at 5.0 against Selcall Selective Calling Tone's 3.2. film Dev Timer also leads on review sentiment (82% vs 50%). Selcall Selective Calling Tone's advantage is ratings volume (14 vs 1) and price ($2.99 vs $3.99). On update cadence, ads, in-app purchases and device support 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

Selcall Selective Calling Tone costs $2.99 and film Dev Timer $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

film Dev Timer holds the better App Store score, 5.0 against 3.2. That said, the two scores are not equally well evidenced: Selcall Selective Calling Tone has 14 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of Selcall Selective Calling Tone's written reviews are positive against 82% of film Dev Timer's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.

Scorecard6 real differences · 4 level
Selcall Selective Calling Tone versus film Dev Timer: the parameters behind the verdict, then further details
ParameterSelcall Selective Calling Tonefilm Dev Timer
Price$2.99 — better$3.99
Rating3.2 (14 ratings)5.0 (1 ratings) — better
Positive reviews50.0% of reviews81.8% of reviews — better
Number of ratings14 — better1
Update frequencyEvery 4 monthsEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS12.0 — better14.0
Further details — not scored
Size2 MB7 MB
Age rating4+4+
DeveloperBlack Cat Systems家啟 褚

Customer experience

Selcall Selective Calling Tone

All ratings14 ratings
Positive50.0%
Neutral14.3%
Negative35.7%
Written reviews38 reviews
Positive50.0%
Neutral13.2%
Negative36.8%

film Dev Timer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews11 reviews
Positive81.8%
Neutral0.0%
Negative18.2%

In-app purchases

None

Selcall Selective Calling Tone

No in-app purchases

None

film Dev Timer

No in-app purchases

Questions

Is Selcall Selective Calling Tone free?
Selcall Selective Calling Tone costs $2.99, with no in-app purchases.
Is film Dev Timer free?
film Dev Timer costs $3.99, with no in-app purchases.
Which has better reviews, Selcall Selective Calling Tone or film Dev Timer?
film Dev Timer is rated higher. Selcall Selective Calling Tone averages 3.2 out of 5 from 14 ratings, while film Dev Timer averages 5.0 from 1 ratings.
Do Selcall Selective Calling Tone or film Dev Timer have ads?
Neither Selcall Selective Calling Tone nor film Dev Timer shows ads.
Which is updated more often, Selcall Selective Calling Tone or film Dev Timer?
Selcall Selective Calling Tone ships an update every 4 months, and film Dev Timer every 4 months. Most recently, Selcall Selective Calling Tone was updated on October 13, 2026 and film Dev Timer on October 4, 2026.

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