# DTMF Decoder vs rDialer Calling Card  Dialer

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.

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.

## The numbers

| Metric | DTMF Decoder | rDialer Calling Card  Dialer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [2.5 (17 ratings)](https://appshunter.io/ios/app/dtmf-decoder/id306195275/reviews) | [2.5 (2 ratings)](https://appshunter.io/ios/app/rdialer-calling-card-dialer/id561026057/reviews) |
| Number of ratings | **17** | 2 |
| Positive reviews | **40.4% of reviews** | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 15 months** |
| Monetization | Free | Free |
| Size | 5 MB | 3 MB |
| Requires iOS | 11.0 | **6.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [dreadtech.com](https://appshunter.io/developer/306195278) | [Rapidsoft Systems, Inc.](https://appshunter.io/developer/469362792) |

## What reviewers say

### DTMF Decoder

[App page](https://appshunter.io/ios/app/dtmf-decoder/id306195275)

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.

**Highlights:** DTMF tone decoding, Microphone input, Displays dialed numbers, Copy to clipboard, Source code available

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### rDialer Calling Card  Dialer

[App page](https://appshunter.io/ios/app/rdialer-calling-card-dialer/id561026057)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| rDialer Calling Card Dialer | $3.99 | one-time |


## Frequently asked questions

### Is DTMF Decoder free?

DTMF Decoder costs $0.99, with no in-app purchases.

### Is rDialer Calling Card  Dialer free?

rDialer Calling Card  Dialer is free to download, with in-app purchases available.

### Which has better reviews, DTMF Decoder or rDialer Calling Card  Dialer?

DTMF Decoder and rDialer Calling Card  Dialer are both rated 2.5 out of 5 on the App Store, from 17 and 2 ratings respectively.

### Do DTMF Decoder or rDialer Calling Card  Dialer have ads?

Neither DTMF Decoder nor rDialer Calling Card  Dialer shows ads.

### Which is updated more often, DTMF Decoder or rDialer Calling Card  Dialer?

DTMF Decoder ships an update every 19 months, and rDialer Calling Card  Dialer every 15 months. Most recently, DTMF Decoder was updated on September 23, 2026 and rDialer Calling Card  Dialer on June 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*