Comparison

DTMF Decoder vs On

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • DTMF tone decoding
  • Microphone input
  • Displays dialed numbers
  • Copy to clipboard
  • Source code available
Features
Read full description

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

About

On

This app helps amateur radio operators manage on-air nets and check-ins. It offers real-time messaging, email integration, and detailed operator information. Track multiple nets simultaneously and access past net data.

Highlights
  • Real-time net check-in tracking
  • Instant messaging (AIM) sessions
  • Integrated email client
  • Simultaneous QRZ/QRZCQ login
  • Past net data search
  • Persistent WebSDR audio listening
  • JS8Call/WSJTX integration
Read full description

On-Air Net Scraper "Personal" Pro is an iPhone/iPad/MacOS silicon App providing a wide range of features for Amateur Radio operators (Hams). Key features include NetLogger Amateur Radio On-Air Nets, Check-Ins and multiple Almost Instant Message (AIM) sessions in real-time data awareness. AIM pass key automatic email request with single button click resulting in immediate pass key information reply. Full integrated Email client for yet another method for Hams to carry out conversations. Multiple tabbed displays allowing user to track unlimited number of On-Air Net Check-Ins at one time. User configurable information displays to included viewing detailed Ham information within Check-In views. Near real-time AIM client text message send and receive. Searching and viewing Past NetLogger Nets and Check-Ins. Monitor mode so users can be aware of NetLogger Check-In "lurkers". Simultaneous QRZ and QRZCQ login is supported facilitating Call Sign lookup and Ham information retrieval. Easy, click to display NetLogger Nets, Check-Ins Call Sign and operator status information, not requiring QRZ/CQ accounts. Multi-screen displays to included improved 2-way and 3-way split screens provide simultaneous displays of Check-Ins, AIM, AIM and Net Scraper Message Exchange current listing data along with WebSDR viewing and listening. PERSISTENT WebSDR radio LIVE audio listenings while simultaneously viewing multiple Net Check-In views. Seamlessly integrates with On-Air Net Scraper Desktop Server WebSocket Interface supporting private Internet chat sessions between On-Air Net Scraper ME clients. JS8Call/WSJTX full participation in digital radio REAL-TIME texting when using NetBird VPN or when paired with On-Air Net Scraper's Message Exchange (ME) Server. Autoload favorite NetLogger nets. Callsign search both NetLogger Active and Past net listing, including improved automatic continuous search and displaying of matched nets. QRZ Logbook insert/update/delete. Supports On-Device authentication and Two-Factor authentication in addition to encrypted secure storage of sensitive data and app access security. JS8Call dynamic frequency adjustment.

Screenshots

DTMF Decoder3 screens
On4 screens

Verdict

The call

The clearest difference is price: On at Free against DTMF Decoder's $0.99. On also leads on rating (4.4 vs 2.5) and update cadence (monthly vs every 19 months). 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

CostPrice · In-app purchases · Ads · Monetization

On is free to download; DTMF Decoder costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On holds the better App Store score, 4.4 against 2.5. Both are backed by a comparable volume of ratings — 17 and 13 respectively. Written reviews point the same way: 39% of DTMF Decoder's written reviews are positive against 50% of On's.

UpkeepUpdate frequency

DTMF Decoder ships an update every 19 months, On monthly. The most recent releases landed on November 6, 2026 and November 13, 2026 respectively.

Scorecard6 real differences · 4 level
DTMF Decoder versus On: the parameters behind the verdict, then further details
ParameterDTMF DecoderOn
Price$0.99Free — better
Rating2.5 (17 ratings)4.4 (13 ratings) — better
Positive reviews39.0% of reviews50.0% of reviews — better
Number of ratings17 — better13
Update frequencyEvery 19 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod, Mac — better
Requires iOS11.0 — better15.6
Further details — not scored
Size5 MB31 MB
Age rating4+17+
Developerdreadtech.comChristopher Robson

Customer experience

DTMF Decoder

All ratings17 ratings
Positive29.4%
Neutral11.8%
Negative58.8%
Written reviews59 reviews
Positive39.0%
Neutral5.1%
Negative55.9%

On

All ratings13 ratings
Positive84.6%
Neutral7.7%
Negative7.7%
Written reviews8 reviews
Positive50.0%
Neutral12.5%
Negative37.5%

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 more
  • 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 more
  • 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"

On

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

DTMF Decoder

No in-app purchases

None

On

No in-app purchases

Questions

Is DTMF Decoder free?
DTMF Decoder costs $0.99, with no in-app purchases.
Is On free?
On is free to download, with no in-app purchases.
Which has better reviews, DTMF Decoder or On?
On is rated higher. DTMF Decoder averages 2.5 out of 5 from 17 ratings, while On averages 4.4 from 13 ratings.
Do DTMF Decoder or On have ads?
Neither DTMF Decoder nor On shows ads.
Which is updated more often, DTMF Decoder or On?
DTMF Decoder ships an update every 19 months, and On monthly. Most recently, DTMF Decoder was updated on November 6, 2026 and On on November 13, 2026.

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