Features & Capabilities

An RTL-SDR Software Defined Radio receiver app for iOS devices.  Listen to AM, FM, SSB and CW radio signals. View an RF spectrum and waterfall. Connect, via the rtl_tcp network protocol, to networked RTL-SDR USB peripherals.

This app requires an external rtl_tcp server. iOS devices do not currently support the direct connection of USB peripherals such as an RTL-SDR. Thus, the use of this app requires network access to a server, such as a Raspberry Pi (or Mac), with an RTL-SDR unit plugged into its USB port, and running the rtl_tcp protocol at an TCP/IP network address accessible from your iOS device. This allows a Raspberry Pi (or Mac) to act, essentially, as the USB port adapter for your iOS device. The rtl_tcp SDR app can also connect to hfp_tcp for the Airspy HF+, rsp_tcp for SDRPlay devices, and lmm_tcp for the LimeSDR Mini; see GitHub for server source code. This app can also connect to a Hermes Lite 2 QRP transceiver directly, if it has a known IP address, or through an hl2_tcp server.

No support is provided for installing any of the rtl_tcp or other tcp software needed to use this app (with a Raspberry Pi, or otherwise). Please do not download this app unless you are already familiar with Software Defined Radio, have an RTL-SDR or equivalent USB SDR peripheral, and have already installed and tested rtl_tcp on your Raspberry Pi, Mac, or other server. Note that this app requires a very high bandwidth network connection in order to receive streams of real-time RF samples from an RTL-SDR. It is recommended that your rtl_tcp server be on a wired connection rather than on the same WiFi as your iOS device.

User Growth & Download Statistics

App
By:
HotPaw Productions
Rating:
2.90
(8)
1.00
Version:
1.5.6 Last updated: 2026-01-21
Version code:
874261165
Creation date:
2018-05-02
Compatible devices:
Size:
3.46MB
Price:
14.99
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Apple Apps Store
Data ingested on:
2026-06-11
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:
HotPaw Productions
Apple Apps Store
https://apps.apple.com/de/app/rtl-tcp-sdr/id1351164646?l=en-GB
Website:
https://www.hotpaw.com/rhn/hotpaw/

User Reviews

I have an RTL-SDR blog v4 connected to a fedora 43 server that I’m running rtl_tcp on. This app is working really well on both my iPhone and iPad, connecting to rtl_tcp. Sounds great and was easy to connect. Would love to see the ability to save and scan channels in this app. Would also be awesome to be able to scan a frequency range.
by Ta*****, 2025-11-21

It isn’t perfect but it really cool to be able listen and even transmit using my Hermes Lite HF rig from anywhere! I think there’s a memory leak or some issue because after a few minutes and several transmissions it starts having issues. But I’m sure that will get fixed eventually. Nice job!
by wd*****, 2025-09-25

Simple, basic remote sdr receiver/ controller- even has a built-in up converter setting. Waterfall looks good lots of different demodulation options. Highly recommend. It’s not some incredibly fancy software, but it does exactly what it says it does. Pretty amazing with apples limitations. Surprising how well it works no frills SDR receiver.
by Ma*****, 2025-07-28
View all user reviews ›

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