DTMF Decoder vs 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
Dialer
This app generates DTMF tones for interacting with landline phone systems and other devices that use these tones. It allows users to play tones directly from their device's speaker and offers features like saving favorite sequences.
- Generate DTMF tones
- Use with POTS and landline phones
- Save favorite tone sequences
- Adjustable volume
- Unlock expanded DTMF tones (Pro)
- Unlimited favorites (Pro)
- Customize tone and pause length (Pro)
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Dialer works with any Plain Old Telephone System (POTS) that accepts Dual tone multi-frequency (DTMF) tones such as a standard landline phone system. To use Dialer, you hold your phone's speaker up to a telephone handset or microphone and play the tone by pressing a button or by selecting one of your saved favorites. Store up to five favorites in the free version for easy dialing, such as calling cards, teleconference numbers, or complicated phone tree's. Commas act as pauses during the dialing tone sequence to allow time for prompts and other delays. Simply hold up your iPhone speaker to the landline telephone's microphone or handset and press dial. Some other devices also use DTMF tones to configure, Dialer is great for these as well. Volume is controlled by your devices volume buttons, so you can easily turn it up or down for just the right volume of your tones. Unlock Dialer Pro features such as unlimited favorites, and the ability to set the dial tone length and pause length (for commas). **Please note that some Voice over IP (VOIP) systems can have trouble recognizing the tones, for those systems try a longer key press allowing enough time for the system to register the tone. Purchase the optional upgrade to unlock these features: - Dial with precision: Unlock the power of four additional expanded DTMF tones – A, B, C, and D. Whether you're interacting with automated systems, entering passwords, or accessing exclusive services, Dialer Pro has got you covered. - Save your favorites effortlessly: With Dialer Pro, you can save an unlimited number of favorites directly from the main dialer screen, ensuring quick and easy access whenever you need it. - Customize your dialing experience: Take control over tone length and pause time when dialing your favorites. Tailor your settings to match your unique requirements, ensuring seamless compatibility with any phone system. ACCESSIBILITY FEATURES: Dialer is now fully accessible with comprehensive VoiceOver support: • Complete screen reader compatibility for blind and visually impaired users • Custom accessibility actions for DTMF tone testing via swipe gestures • Configurable VoiceOver delay timing for optimal audio experience • Clear button labels and navigation hints throughout the app • Accessible favorites management and editing Download Dialer today and make your dialing experience smarter, faster, and more enjoyable.
Screenshots
Verdict
The clearest difference is price: Dialer at Free against DTMF Decoder's $0.99. Dialer also leads on rating (3.9 vs 2.5) and update cadence (every 5 months vs every 19 months). DTMF Decoder's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 18.0). On ads 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
Dialer is free to download; DTMF Decoder costs $0.99 up front. Dialer sells 1 one-off in-app purchase. DTMF Decoder asks for nothing beyond the download.
Dialer holds the better App Store score, 3.9 against 2.5. Both are backed by a comparable volume of ratings — 17 and 74 respectively. Written reviews point the same way: 40% of DTMF Decoder's written reviews are positive against 57% of Dialer's.
DTMF Decoder ships an update every 19 months, Dialer every 5 months. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.
| Parameter | DTMF Decoder | Dialer |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 2.5 (17 ratings) | 3.9 (74 ratings) — better |
| Positive reviews | 40.4% of reviews | 57.1% of reviews — better |
| Number of ratings | 17 | 74 — better |
| Update frequency | Every 19 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 5 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | dreadtech.com | Emmanuel Tsouris |
Customer experience
DTMF Decoder
Dialer
In-app purchases
DTMF Decoder
No in-app purchases
Dialer
- Pro Upgrade$4.99








