# Key-Tone-Decoder — Real-time DTMF signal decoder

> Real-time DTMF signal decoder using device microphone. (iPhone/iPad app by NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI.)

- Source: https://appshunter.io/ios/app/key-tone-decoder/id6738107351 (this page in markdown: same URL + `.md`)
- Developer: [NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI](https://appshunter.io/developer/1674573382)
- Category: Productivity, Utilities
- Price: $0.99
- Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 1 MB
- Languages: American English
- Released: 2024-11-21
- Data updated: 2026-08-15
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/key-tone-decoder/id6738107351/reviews.md

## What is Key?

Key-Tone-Decoder: Real-Time DTMF Signal Decoder

Dual-tone multi-frequency (DTMF) signaling is a telecommunication system that facilitates communication between telephone equipment, other devices, and switching centers using voice-frequency tones over telephone lines.

Key-Tone-Decoder leverages your iPhone's microphone to capture these DTMF signals, instantly decoding them and displaying the decoded numbers on your screen in real-time. Perfect for professionals and tech enthusiasts, Key-Tone-Decoder makes it easy to decode DTMF signals right from your device.

## Key features

- Real-time DTMF signal decoding
- Uses device microphone
- Displays decoded numbers instantly
- Suitable for professionals
- Useful for tech enthusiasts

## Chart rankings

- #195 in Top Paid · Productivity (US App Store)

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/key-tone-decoder/id6738107351/reviews.md

### 1/5 — App crashes on pressing start

*2025-01-03*

Doesn’t function

## Frequently asked questions about Key

### What is Key-Tone-Decoder?

Key-Tone-Decoder is a real-time DTMF signal decoder that uses your iPhone's microphone to capture and display DTMF tones as numbers on your screen.

### How does Key-Tone-Decoder work?

It listens for dual-tone multi-frequency (DTMF) signals through your device's microphone and instantly translates them into readable numbers.

### Who is Key-Tone-Decoder for?

This app is designed for professionals and tech enthusiasts who require a quick and easy way to decode DTMF signals directly from their mobile device.

### What devices does Key-Tone-Decoder support?

Key-Tone-Decoder is available for iPhone, iPad, and iPod devices.

### What is the age rating for Key-Tone-Decoder?

The app has an age rating of 4+.

### How much does Key-Tone-Decoder cost?

Key-Tone-Decoder is a paid application, priced at $0.99.

### Does Key-Tone-Decoder have ads?

No, Key-Tone-Decoder does not contain advertisements.

### When was Key-Tone-Decoder last updated?

Key-Tone-Decoder was last updated on November 21, 2024, with version 1.0.

## Version history (last 1 release)

### 1.0 — 2024-11-21

No release notes.

## More apps by NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI

- [OSpectrometer](https://appshunter.io/ios/app/ospectrometer/id6446124449)
- [Lidar Scan Interior](https://appshunter.io/ios/app/lidar-scan-interior/id6469167359)
- [Sum of the Numbers](https://appshunter.io/ios/app/sum-of-the-numbers/id6470129193)
- [Mobile VPN](https://appshunter.io/ios/app/mobile-vpn/id6474999363)
- [Air Analyzer](https://appshunter.io/ios/app/air-analyzer/id6477150361)

All apps by NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI: https://appshunter.io/developer/1674573382

## Related topics

[dtmf decoder](https://appshunter.io/ios/topics/dtmf-decoder)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-15.*