DTMF Decoder vs Odmaster
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
Odmaster
This application allows users to program various radio models directly from their mobile phones, eliminating the need for a computer. It offers a convenient and portable solution for radio programming and includes a community feature for sharing content and interacting with other users.
- Program radio with mobile phone
- Supports multiple radio models
- Convenient and portable programming
- Community sharing and interaction
- Help Center and direct support
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• Use Odmaster to program your radio faster and easier. Multiple radio models are set in the application. At the same time, you can share interesting content on the community page. Bring you a different experience! • • Program radio • (Tips：this function requires a Bluetooth programmer device) • • Program radio with mobile phone instead of computer easily • • Program radio conveniently, anytime and anywhere • • Program multiple models of radios • • Remote programming radio when you don’t know how to program • • Social function • • Can post something interesting on it • • Give someone a like • • Make comments on others posts • • Help&Support • • If you have any problems during using App, you can find the answers in Help Center, or contact us. • • ► Get some programming information in our YouTube website: • https://www.youtube.com/channel/UCW5VMOpgmTdUQq5ZqyIL2hA/videos • ► Contact detail: E-mail: odmaster@tid-china.com • ► Online manual:https://bit.ly/tidmanual
Screenshots
Verdict
The clearest difference is price: Odmaster at Free against DTMF Decoder's $0.99. Odmaster also leads on rating (3.8 vs 2.5) and update cadence (every 3 weeks vs every 19 months). DTMF Decoder's advantage is review sentiment (39% vs 29%) and iOS requirement (11.0 vs 14.0). On ads, in-app purchases, monetization model 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
Odmaster is free to download; DTMF Decoder costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Odmaster holds the better App Store score, 3.8 against 2.5. That said, the two scores are not equally well evidenced: Odmaster has 1.1K ratings behind it against 17, so its average is the more settled of the two. Written reviews complicate that: 39% of DTMF Decoder's written reviews are positive against 29% of Odmaster's, so the app with the better star average is not the one people write more warmly about.
DTMF Decoder ships an update every 19 months, Odmaster every 3 weeks. Both last shipped on October 27, 2026.
| Parameter | DTMF Decoder | Odmaster |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 2.5 (17 ratings) | 3.8 (1.1K ratings) — better |
| Positive reviews | 39.0% of reviews — better | 28.5% of reviews |
| Number of ratings | 17 | 1.1K — better |
| Update frequency | Every 19 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 11.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 5 MB | 96 MB |
| Age rating | 4+ | 17+ |
| Developer | dreadtech.com | Guangzhou Billion Leiden Electronic Technology Co., Ltd. |
Customer experience
DTMF Decoder
Odmaster
User reviews
DTMF Decoder
From 17 App Store ratingsWhat we love
- 👍 Works as advertised (for some)
- 👍 Handy for professionals
- 👍 Useful for troubleshooting
- 👍 Good value for money (for some)
- 👍 Can pick up speed dial tones
Room to improve
- 🐛 Too many "double digits" / errors
- 🐛 Doesn't work well
- 🐛 Never displays anything
- 🐛 Nothing would get it to work
- 🐛 Piece of crap doesn’t work
Odmaster
From 1.1K App Store ratingsWhat we love
- 👍 Easy to use
- 🚀 Convenient mobile programming
- 💡 Helpful community features
Room to improve
- 🐛 Frequent crashes and bugs
- 🔒 Poor account registration process
- 🔋 High battery drain
- 👎 Unreliable Bluetooth connectivity
Bugs and requests
DTMF Decoder
Reported bugs
32 issues- Too many "double digits"
- Generates errors
- Phonal Tonal generates random (phantom) numbers
- Never displays anything
- Nothing would get the app to work
Show 27 moreShow fewer
- Doesn't pick up tones
- Doesn't work
- Won't work with new iPhone update
- Doesn't detect anything
- Misses about half of the numbers
- Poor performance
- Only usable at full sensitivity, and works poorly then
- Never identified even one digit
- Unhappy with latest version
- On/off switch serves no purpose
- Decoded box works poorly
- Doesn't decode hex
- Doesn't work properly
- Only gets about half of the numbers correct
- Erkennung mangelhaft (poor recognition)
- Couldn't recognise accurately
- Only got the number 0 each time
- 使え方 (not usable)
- Doesn't work
- Not working as stated
- Barely works
- Usually nothing detected
- Only detected a couple of digits
- Misses digits when sound is too loud
- Display is too small
- Doesn't support scrolling back
- Stray false digits, especially 1's
Requested features
11 requests- Buffering for DTMF better
- Ability to get this work with new iPhone update
- History feature
- Decode hex
- Ability to decode faster (shorter) tones
Show 6 moreShow fewer
- More sensitive and flexible detection
- Translation into multiple languages
- See each decode on a separate line
- Continue decoding while app is closed (background operation)
- DTMF tone generator
- Shorten app name to "DTMF"
Odmaster
Reported bugs
3 issues- Unable to read or write radio data
- Inconsistent behavior across iOS versions
- Login and account issues
Requested features
3 requests- Support for more radio models
- Ability to save and load custom channel configurations
- Improved user interface and navigation
In-app purchases
DTMF Decoder
No in-app purchases
Odmaster
No in-app purchases
