DTMF Decoder vs HamAlert
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
HamAlert
Receive instant push notifications for desired amateur radio contacts. Filter alerts by various criteria like callsign, band, mode, and location. Stay updated on DX spots from multiple sources.
- Push notifications for desired stations
- Filter spots by DXCC, callsign, and location
- Support for Reverse Beacon Network, SOTAwatch, DX cluster, PSK Reporter
- Filter by band, mode, and time
- Filter by spotter callsign and DXCC
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This app is a companion to the HamAlert web site (hamalert.org) and lets you receive push notifications from HamAlert. HamAlert is a system that allows amateur radio operators to get notifications when a desired station appears on the DX cluster, the Reverse Beacon Network, SOTAwatch, POTA, WWFF Spotline, or PSK Reporter. Spots can be filtered by various criteria, including: • DXCC (both actual and callsign home DXCC) • Callsign • Island reference • Summit reference • Park reference • CQ zone • Continent • Band • Mode • Time and days of week • Source • Spotter callsign and DXCC
Screenshots
Verdict
The clearest difference is price: HamAlert at Free against DTMF Decoder's $0.99. HamAlert also leads on rating (4.1 vs 2.5) and review sentiment (70% vs 40%). DTMF Decoder's advantage is iOS requirement (11.0 vs 15.6). On ratings volume, ads, in-app purchases 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
HamAlert is free to download; DTMF Decoder costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
HamAlert holds the better App Store score, 4.1 against 2.5. Both are backed by a comparable volume of ratings — 17 and 33 respectively. Written reviews point the same way: 40% of DTMF Decoder's written reviews are positive against 70% of HamAlert's.
DTMF Decoder ships an update every 19 months, HamAlert every 5 months. The most recent releases landed on October 2, 2026 and October 4, 2026 respectively.
| Parameter | DTMF Decoder | HamAlert |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 2.5 (17 ratings) | 4.1 (33 ratings) — better |
| Positive reviews | 40.4% of reviews | 70.0% of reviews — better |
| Number of ratings | 17 | 33 — better |
| Update frequency | Every 19 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 5 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | dreadtech.com | Manuel Kasper |
Customer experience
DTMF Decoder
HamAlert
In-app purchases
DTMF Decoder
No in-app purchases
HamAlert
No in-app purchases
