Features & Capabilities

Morse Decoder: Valiance Backbone for CW (VBC) VBC is the No. 1 Morse code decoder in the Japanese market, encompassing both paid and free categories.

This app allows you to decode Morse code using the built-in microphone of your iPhone or iPod touch. VBC utilizes the world's fastest FFT (Fast Fourier Transform) technology to detect and decode carriers. It is specifically designed to minimize false decodes from atmospheric noise, voices, or beep sounds (square or trapezoidal waves). While it will not decode vocalized "dit-dah" sounds, it offers an extremely high success rate for decoding actual transceiver signals. (Please check our videos of real DX station communications).

We believe its decoding capability surpasses that of many expensive dedicated hardware units and PC software. The carrier detection mode is highly effective, making it a truly practical tool for active hunting and pouncing in real-world radio operations.

The default settings are optimized for the best performance balance. We recommend testing it with an actual radio (800Hz tone) at a short distance using the default configuration.

Key Features: Morse Sound Recorder & Player Export text logs, audio data, and history via email Timestamp and cancel stamp insertion in logs Predictive decoding for difficult or connected Morse codes Zero-in Tone Indicator / Shift-in Indicator Tone frequency measurement (±5Hz) Sound pressure measurement (dB) Audio frequency response measurement & automatic correction Peak search / Manual frequency setting (double-tap screen) Automatic speed tracking / Manual speed setting (double-tap screen) Auto Level / Auto Threshold / Manual Threshold (double-tap screen) Noise reduction & waveform shaping via carrier detection Japanese (Wabun) Morse support Signal level adjustment Input Level Over-Range Indicator When the input level exceeds the range (Over-Range), the waveform becomes distorted, leading to poor decoding accuracy. If this happens, please move your device further away from the radio. (Avoid placing the device directly on a vibrating radio; maintain a sufficient distance. The app is designed to decode accurately even from a significant distance.)Supports decoding speeds from 5 to 40 WPM

For more information and to see the app in action, please visit our YouTube channel for Real-DX videos and more: http://goo.gl/ALXAqH http://goo.gl/yEu3d1 http://goo.gl/7gp4yw

Note: Due to scrolling issues on the decode screen since iOS 8, we utilize the following library for text display. Our sincere thanks to the developer: SECoreTextView Created by kishikawa katsumi on 2015/03/25. Copyright (c) 2013-2015 kishikawa katsumi. All rights reserved.

User Growth & Download Statistics

App
By:
Nob
Version:
1.60.0 Last updated: 2026-02-11
Version code:
881611474
Creation date:
2012-06-28
Compatible devices:
Size:
28.15MB
Price:
3.99
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Apple Apps Store
Data ingested on:
2026-06-09
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.
Developed by:
Nob
Apple Apps Store
https://apps.apple.com/us/app/valiance-backbone-for-cw-vbc/id521096092
Website:
https://www.noble-system.com/?page_id=648

User Reviews

Did not detect the correct tones for a repeater Id... Lame
by At*****, 2015-09-05

This is worse than bad !! It will not even copy my straight key. I should have spent the money on a couple of packs of gum.
by R.*****, 2013-06-01

I downloaded this to test with an amateur radio on 40m I'm learning CW and hoping to use some tools along the way. I have run this on an iTouch 4 and an iPad. This app transcribes software as well or better than many of the other applications I've used on PCs and Macs. the auto threshold is fairly effective in keeping noise out of the signal. The auto frequency sensor is very responsive. I It's not perfect, but well worth the cost. I was pleasantly surprised.
by St*****, 2013-03-10
View all user reviews ›

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