dBm Convert vs Demod
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
dBm Convert
Read full descriptionHide full description
Description dBm Calc is a powerful, user-friendly conversion tool designed specifically for engineers, technicians, and audio professionals. Whether you’re working with RF signals, audio levels, or other power measurements, dBm Calc makes it easy to convert between dBm, Watts, and Vpp. Key Features: • Accurate Conversions: Convert dBm to Watts and Vpp with precision. Adjust calculations by applying an optional attenuation value to reflect real-world conditions. • Intuitive Interface: Designed for simplicity, dBm Calc’s clean layout ensures that you can quickly input values and get results without any hassle. • Built for Professionals: Ideal for RF, audio, and electronics applications, this app provides reliable conversion results when you need them most. • Cross-Platform Compatibility: Optimized for macOS and iOS, dBm Calc is perfect for both desktop and on-the-go usage.
Demod
Transform your iPhone into a software-defined radio receiver. Connect to SDR servers to explore shortwave, ham radio, aircraft, and marine frequencies. Enjoy real-time displays and various demodulation modes.
- Real-time waterfall and spectrum display
- AM, NFM, WFM, USB, LSB, and CW demodulation
- Adjustable bandwidth, gain, and squelch
- Save and recall favorite frequencies
- Browse public SDR servers worldwide
- AirPlay output and Lock Screen controls
Read full descriptionHide full description
Demod turns your iPhone into a software-defined radio receiver. Connect to an SDR server on your own network or anywhere on the internet and explore the airwaves — from shortwave broadcasts and ham radio to aircraft, marine, and FM. Demod is a client for the most common SDR servers: • rtl_tcp — for RTL-SDR dongles • SpyServer — for Airspy and RTL-SDR • KiwiSDR — HF web receivers • OpenWebRX — web SDRs (HF, VHF and UHF) There's no hardware to plug into your phone. Point Demod at a server you run (a Raspberry Pi, PC, or Mac with an SDR dongle), or browse hundreds of public servers around the world and start listening in seconds. FEATURES • Real-time waterfall and spectrum display — Metal-accelerated and smooth • Pinch to zoom, drag to tune, two-finger pan • AM, NFM, WFM, USB, LSB, and CW demodulation • Decode CW (Morse), RTTY, PSK31, and FT8 on-screen (beta) • Time-Shift: pause and rewind live radio, DVR-style • Record what you hear — with a pre-roll of the moment you tapped • Live Text: on-device transcription of what you're listening to, with on-device translation of the captions (iOS 18+) and a full-screen transcript reader • Identify: one-tap "what is this signal?" — measures the signal on-device, matches it against a built-in band plan, and suggests the right mode (works with Siri: "ask Demod what this signal is") • Scanner: scan your memories, a band range, or let Smart scan find active signals across the captured spectrum • Spectral noise reduction, noise blanker, and mains-hum notch • Browse public KiwiSDR, OpenWebRX, and SpyServer receivers worldwide — list or map view • Save and recall favorite frequencies — import and export as CSV • Direct-sampling and upconverter support for HF • AirPlay output and Lock Screen playback controls • Adjustable bandwidth, gain (auto or manual), squelch, and display layouts PRIVACY Demod collects no data. No accounts, no tracking, no ads. Recording, transcription, translation, and signal identification all run entirely on your device — audio and text never leave it. Your settings, recordings, and transcripts stay under your control. Built for radio hobbyists, shortwave listeners, scanner enthusiasts, and ham operators who want a fast, native receiver in their pocket. Note: Demod is a receiver client and requires an SDR server to connect to. You can use a server you run yourself or one of the many free public servers listed in the app.
Screenshots
Verdict
The clearest difference is price: dBm Convert at $1.99 against Demod's $9.99. Demod's advantage is update cadence (weekly vs every 9 months) and chart position (#169 vs unranked). On ads, in-app purchases, device support and iOS requirement 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
dBm Convert costs $1.99 and Demod $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
dBm Convert ships an update every 9 months, Demod weekly. The most recent releases landed on October 11, 2026 and October 13, 2026 respectively.
| Parameter | dBm Convert | Demod |
|---|---|---|
| Price | $1.99 — better | $9.99 |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 9 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Best chart rank | — | #169 — better |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 18.2 | 17.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Open Technologies | Alphonse Romero |
In-app purchases
dBm Convert
No in-app purchases
Demod
No in-app purchases









