--- title: "Spectral Bands: SDR Client - Reviews, Revenue and Downloads in United States | Apple App Store" description: "SPECTRAL // BANDS — Signal Intelligence for iOS Your RTL-SDR. Your iPhone. No compromises. Spectral Bands is a high-performance Software Defined Radio client built for operators who demand real-time" --- # Spectral Bands: SDR Client — United States > RTL-SDR & WebSDR Signal Client ![Spectral Bands App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/eb/7d/dd/eb7dddc3-c43f-6630-1c0e-9e3a525ad0f6/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png) **Developer:** [Matthew Delashaw](https://apptail.io/developer/matthew-delashaw-CCPmbc) **Category:** Utilities **Rating:** N/A (0 ratings) **Price:** Free **Bundle ID:** DoubleAsterisks.SpectralBands **Store:** Apple App Store **Country:** United States **Version:** 1.0.1 (released 2026-04-20) **Original Release:** 2026-04-19 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6761870140) **AppTail Page:** [https://apptail.io/app/spectral-bands-sdr-client-ntyz/united-states](https://apptail.io/app/spectral-bands-sdr-client-ntyz/united-states) ## Spectral Bands Description SPECTRAL // BANDS — Signal Intelligence for iOS Your RTL-SDR. Your iPhone. No compromises. Spectral Bands is a high-performance Software Defined Radio client built for operators who demand real-time signal visualization and clean audio demodulation on the go. Connect to any rtl_tcp or rtlsdr-next WebSDR server and put a full signal intelligence station in your pocket. BUILT FOR THE BAND Whether you're monitoring 2m repeaters, chasing HF SSB DX, scanning air traffic, or hunting numbers stations at 3am — SpectralBands handles it with a DSP pipeline engineered for accuracy, not approximation. — WFM / NFM / AM / USB / LSB demodulation — 1024-bin real-time waterfall with dynamic range calibration — Calibrated spectrum analyzer, -100 to 0 dB — Software AGC with noise gating — Squelch control for NFM monitoring — Adjustable IF filter bandwidth for SSB and AM TWO PATHS, ONE CLIENT Connect to an rtlsdr-next server for high-efficiency server-side DSP with lower mobile CPU load, or drop into full local processing mode against any standard rtl_tcp server — complete with multi-stage FIR decimation and Hilbert SSB. The rtlsdr-next server software is open-source and can be hosted on any Linux or macOS machine with an RTL-SDR dongle. Search for 'rtlsdr-next' on GitHub for the official setup guide and high-performance daemon. BUILT FOR THE FIELD Background audio keeps your frequency monitored while you use other apps or lock your screen. A frequency bookmark registry lets you save and recall your favorite channels instantly. Reconnection logic handles mobile network handoffs without dropping your session. THE INTERFACE High-contrast OLED-optimized display designed for dark environments. If your shack looks like a 1980s cyberpunk film, you'll feel right at home. Requires a networked RTL-SDR server (rtl_tcp or rtlsdr-next). iOS 18.6+, iPhone 12 or newer recommended. ## Spectral Bands Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/a7/f0/b4/a7f0b462-9d88-8db8-9f14-e5615e3ad74f/rtl_tcp.6.5_inch.png/1284x2778.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/02/00/3c/02003c39-4001-65c8-8216-04f99088adfb/waterfall.6.5_inch.png/1284x2778.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/c6/ef/3f/c6ef3f56-36df-cb36-a64d-77efd2912c49/websdr.6.5_inch.png/1284x2778.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/4f/3d/ea/4f3dea73-3996-4018-8e1e-0e282efe8e2a/error-feedback.6.5_inch.png/1284x2778.png) ## Spectral Bands Available In - [Angola](https://apptail.io/app/spectral-bands-sdr-client-ntyz/angola) - [Australia](https://apptail.io/app/spectral-bands-sdr-client-ntyz/australia) - [United Kingdom](https://apptail.io/app/spectral-bands-sdr-client-ntyz/united-kingdom) - [Ghana](https://apptail.io/app/spectral-bands-sdr-client-ntyz/ghana) - [Jamaica](https://apptail.io/app/spectral-bands-sdr-client-ntyz/jamaica) - [Kenya](https://apptail.io/app/spectral-bands-sdr-client-ntyz/kenya) - [Cayman Islands](https://apptail.io/app/spectral-bands-sdr-client-ntyz/cayman-islands) - [Sri Lanka](https://apptail.io/app/spectral-bands-sdr-client-ntyz/sri-lanka) - [Mauritius](https://apptail.io/app/spectral-bands-sdr-client-ntyz/mauritius) - [Panama](https://apptail.io/app/spectral-bands-sdr-client-ntyz/panama) - [Suriname](https://apptail.io/app/spectral-bands-sdr-client-ntyz/suriname) - [Taiwan](https://apptail.io/app/spectral-bands-sdr-client-ntyz/taiwan) - [Uganda](https://apptail.io/app/spectral-bands-sdr-client-ntyz/uganda) - [United States](https://apptail.io/app/spectral-bands-sdr-client-ntyz/united-states) - [Uruguay](https://apptail.io/app/spectral-bands-sdr-client-ntyz/uruguay) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends. - [Search Apps](https://apptail.io) - [Top Charts](https://apptail.io/top-iphone-apps) - [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer) *Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*