DTMF Decoder vs Avia
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
Avia
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The Avia mobile app is used to set up and manage your Avia device in-store. Easily connect your Avia hardware to WiFi, pair it with your POS, and confirm that data is flowing securely.
Screenshots
Verdict
The clearest difference is price: Avia at Free against DTMF Decoder's $0.99. Avia also leads on update cadence (monthly vs every 19 months). DTMF Decoder's advantage is iOS requirement (11.0 vs 15.1). On 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
Avia is free to download; DTMF Decoder costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
DTMF Decoder ships an update every 19 months, Avia monthly. The most recent releases landed on September 23, 2026 and August 27, 2026 respectively.
| Parameter | DTMF Decoder | Avia |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 2.5 (17 ratings) — better | — |
| Positive reviews | 40.4% of reviews | — |
| Number of ratings | 17 — better | — |
| Update frequency | Every 19 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 5 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | dreadtech.com | Retailogists |
In-app purchases
DTMF Decoder
No in-app purchases
Avia
No in-app purchases
