DTMF Decoder vs rDialer Calling Card Dialer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DTMF Decoder
This utility transforms your iPhone into a DTMF tone decoder. It listens to DTMF tones through the microphone and displays the dialed numbers. Decoded digits can be easily copied to the clipboard for further use.
- DTMF tone decoding
- Microphone input
- Displays dialed numbers
- Copy to clipboard
- Source code available
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Turns your iPhone into a simple DTMF decoder. Simply hold the iPhone's microphone near to a clear source of DTMF tones (telephone "Touch Tones") and it will display the numbers being dialed. The decoded digits are also placed into a text area from which you can copy them to the clipboard. See it in action here: https://www.youtube.com/watch?v=l_QD8KFCJPw Source code freely available: https://github.com/veghead/ios-dtmf-decoder
rDialer Calling Card Dialer
Automate your calling card or prepaid calls with this dialer. Predefine access numbers and PINs to save time dialing international numbers. Supports multiple calling cards and syncs with your contacts.
- Automated calling card dialing
- Predefined access numbers and PINs
- Syncs with phone contacts
- Multi-card support
- Pin and Pin-Less dialing modes
- Works over cellular network
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Rapidsoft Systems rDialer Calling Card(CC) Dialer is a simple calling card dialer that helps you automate your calling card or prepaid calls. Feel free to call us if you run into any problem, and we will provide necessary support. Once you have configured your local access number and Pin (optional), you don't have to remember it again. You can straight away dial the actual international number saving you time to dial. rDialerCC is supported 24x7 by a Mid Size US company. It has two modes: calling card with Pin and Pin-Less dialing. - Easy to use: Access number & pin of calling card/ access server can be predefined, users doesn't need to enter again. - Multi-card support. - The application automatically syncs with all your phones contacts. - You can dial manually or select the number directly from the contacts tab. - Works over a cellular network, no wireless or Wi-Fi data connection needed. - Attractive Dial Pad Design. - No Advertisement. - Tested with multiple operators. WHITE LABLED OPERATOR VERSION Rapidsoft systems also offers white labeled rDialerCC for VOIP operators to allow mobile users to make Pinless long distance or international calls. rDialerCC is available for service providers who can use this calling card dialer and get it integrated with their existing calling card server. These dialers use DTMF dial tone to dial out a called party number. Since these dialers don't use SIP, they can work anywhere and on any cellular network. However, these dialers use local cellular minutes of the users. We provide separate SIP dialers that are designed for VoIP network where SIP is an appropriate medium for calling. - The operator version of dialer provides selection of local access number. A list of access number can be preloaded on the phone or can be updated from a server. Feel free to call us if you run into any problem, and we will provide necessary support.
Screenshots
Verdict
The clearest difference is price: rDialer Calling Card Dialer at Free against DTMF Decoder's $0.99. rDialer Calling Card Dialer also leads on iOS requirement (6.0 vs 11.0). DTMF Decoder's advantage is in-app purchases (none vs 1) and review sentiment (40% vs 20%). On rating, update cadence, ads 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
rDialer Calling Card Dialer is free to download; DTMF Decoder costs $0.99 up front. rDialer Calling Card Dialer sells 1 one-off in-app purchase. DTMF Decoder asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 2.5 for DTMF Decoder against 2.5 for rDialer Calling Card Dialer. That said, the two scores are not equally well evidenced: DTMF Decoder has 17 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 40% of DTMF Decoder's written reviews are positive against 20% of rDialer Calling Card Dialer's.
DTMF Decoder ships an update every 19 months, rDialer Calling Card Dialer every 15 months. The most recent releases landed on September 23, 2026 and June 5, 2026 respectively.
| Parameter | DTMF Decoder | rDialer Calling Card Dialer |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 2.5 (17 ratings) | 2.5 (2 ratings) |
| Positive reviews | 40.4% of reviews — better | 20.0% of reviews |
| Number of ratings | 17 — better | 2 |
| Update frequency | Every 19 months | Every 15 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 11.0 | 6.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | dreadtech.com | Rapidsoft Systems, Inc. |
Customer experience
DTMF Decoder
rDialer Calling Card Dialer
In-app purchases
DTMF Decoder
No in-app purchases
rDialer Calling Card Dialer
- rDialer Calling Card Dialer$3.99
Questions
Is DTMF Decoder free?
Is rDialer Calling Card Dialer free?
Which has better reviews, DTMF Decoder or rDialer Calling Card Dialer?
Do DTMF Decoder or rDialer Calling Card Dialer have ads?
Which is updated more often, DTMF Decoder or rDialer Calling Card Dialer?
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