Best Dtmf Decoder Apps

250+ iOS apps curated and reviewed

3.8 avg rating
16 free apps
Updated October 2026

Out of 250+ dtmf decoder apps on iOS, 16 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Dtmf Decoder Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1DTMF DecoderDTMF Decoder$0.992.6★ (16)NoNoOct 2026
2DTMF - Sound of Dialing KeypadDTMF - Sound of Dialing KeypadFree2.2★ (10)NoNoOct 2026
3GGMorseGGMorseFree4.2★ (76)NoNoOct 2026
4RST DecoderRST DecoderFree5.0★ (7)YesNoOct 2026
5DTMF Dialer ToolDTMF Dialer ToolFree4.5★ (13)YesYesOct 2026
6DTMFdecDTMFdec$2.993.4★ (5)NoNoOct 2026
7Key-Tone-DecoderKey-Tone-Decoder$0.991.0★ (1)NoNoSep 2026
8SMD decoderSMD decoderFree5.0★ (1)NoNoMay 2026

Top Picks for Dtmf Decoder

2.6😞(16 ratings)
$0.99
DTMF Decoder screenshot 1
DTMF Decoder screenshot 2
DTMF Decoder screenshot 3

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.

What 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
  • 👍 Adjustment functionality for noisy inputs
  • 👍 Idiot-proof interface (for some)
  • 👍 Works perfectly for me (for some)
  • 👍 Catches long and fast sequences (with tweaks)
  • 👍 Open sourced under GPL (transparency)
  • 👍 Works great for ham radio operators
  • 👍 Simple and effective
  • 👍 Brilliant app for those who know its use
  • 👍 Works well for decoding DTMF

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
  • 🐛 Useless
  • 🐛 Won't work with new iPhone update
  • 🐛 Doesn't work at all
  • 🐛 Pretty useless
  • 🐛 Misses about half the numbers
  • 🐛 Poor performance
  • 🐛 Only usable at full sensitivity, works poorly
  • 🐛 Terrible - does NOT work
  • 🐛 Unhappy with latest version
  • 🐛 No instructions or labels
  • 🐛 Decoded box works poorly
  • 🐛 Does not work
  • 🐛 Useless
  • 🐛 Not usable
  • 🐛 Disappointing
  • 🐛 Doesn't work reliably
  • 🐛 Misses repetitions or gets decode wrong
  • 🐛 Gets hopelessly wrong decode results for fast autodial
  • 🐛 Too many errors to use reliably
  • 🐛 Useless
  • 🐛 Doesn't decode
  • 🐛 Etwas für die Tonne (not usable)
  • 🐛 Absolute Garbage
  • 🐛 Barely decodes
  • 🐛 Cannot keep up with quick tones
  • 🐛 Doesn't decode hex
  • 🐛 Doesn't work properly
  • 🐛 A waste of money
  • 🐛 Only gets about half the numbers correct
  • 🐛 Erkennung mangelhaft (poor recognition)
  • 🐛 Doesn't recognise accurately
  • 🐛 Garbage
  • 🐛 Only got number 0 each time
  • 🐛 使え方 (not usable)
  • 🐛 Doesn't work
  • 🐛 Not working as stated
  • 🐛 Barely works
  • 🐛 Usually nothing detected
  • 🐛 Don't bother
  • 🐛 Not worth it
  • 🐛 Does not detect DTMF tones very well
  • 🐛 Only detected a couple of digits
  • 🐛 Misses digits when sound is too loud
  • 🐛 Only "decode" the number 0
  • 🐛 Not sensitive enough
  • 🐛 Couldn't get it to recognize anything
  • 🐛 No status indicator
  • 🐛 Needs fixing now
  • 🐛 Fortement deconseillé (strongly not recommended)
  • 🐛 Ripped-off
  • 🐛 Total waste
  • 🐛 Display is too small
  • 🐛 Doesn't support scrolling back
  • 🐛 Wasted screen space
  • 🐛 Stray false digits, especially 1's
GGMorse#3

GGMorse by Georgi Gerganov

Morse Code Audio Decoder
Worth Considering
🔧 Utilities
4.2😐(76 ratings)
Free
GGMorse screenshot 1
GGMorse screenshot 2
GGMorse screenshot 3
GGMorse screenshot 4

Decode Morse code audio into text in real-time. This app automatically detects signal frequency and speed, displaying decoded text instantly. Simply allow microphone access and place your device near the audio source.

What We Love

  • 👍 Works well for decoding Morse code
  • 👍 Good for learning Morse code
  • 👍 Accurate decoding with strong signals
  • 👍 Tx works fantastically
  • 👍 Intuitive interface
  • 👍 Useful for video game Easter eggs
  • 👍 Professional and well-made app
  • 👍 Works even in difficult conditions
  • 👍 No obstructive ads or sign-in
  • 👍 Simple and modern design
  • 👍 Smooth performance
  • 👍 Highly customizable settings
  • 👍 Decodes immediately with ambient sound
  • 👍 Great for ham radio operators
  • 👍 Free to use
  • 👍 Reliable and impressive accuracy

Room to Improve

  • 🐛 Decoding is inconsistent
  • 🐛 Poor microphone access handling
  • 🐛 Keyboard covers screen
  • 🐛 Audio decoding issues
  • 🐛 Produces nonsense text
  • 🐛 Difficult to use for beginners
  • 🐛 Sensitive speed sliders
  • 🐛 Doesn't work well with SDR
  • 🐛 UI elements too small
  • 🐛 No way to save settings
  • 🐛 No way to increase font size
  • 🐛 Decoded text scrolls off screen
  • 🐛 App stopped working after an update
  • 🐛 Can't see what you're typing

More Dtmf Decoder apps to explore

FAQ about Dtmf Decoder

What are the best dtmf decoder apps for iPhone?
DTMF Decoder tops our dtmf decoder apps ranking as of October 2026, with a 2.6-star average from 16 App Store ratings, and it's priced at $0.99.
Yes — 16 of the top dtmf decoder apps we rank are free to download, including DTMF - Sound of Dialing Keypad and GGMorse.
DTMF Decoder has no ads and has no in-app purchases, according to its App Store listing as of October 2026.
We track 250+ dtmf decoder apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.