SDR Receiver vs RSS Radar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SDR Receiver
This app demodulates and plays AM and FM radio signals received by compatible SDR hardware. It allows users to listen to various broadcasts, manage station lists, and adjust audio settings. Requires a separate radio and host computer for operation.
- Demodulate AM and FM signals
- Manage station lists (import/export)
- Adjustable squelch and LNA gain
- Adjustable audio filters
- Signal strength indicator
- AirPlay audio streaming
- Lock Screen controls
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Demodulate and play AM and FM signals received by an RTL-SDR, Airspy HF+ or SDRplay radio. Requires a radio and a host computer which are not provided with SDR Receiver and must be separately installed and configured. Streams data from an rtl_tcp, hfp_tcp or rsp_tcp server application which are free and open source applications. The appropriate server application must be installed on the host computer and configured for the attached radio. SDR Receiver is a Software Defined Radio (SDR) that processes, demodulates and plays AM, narrowband FM and wideband FM signals. Listen to communications from aircraft (AM), amateur repeaters and VHF handhelds, police and fire, NOAA weather reports (narrowband FM) and commercial broadcasts (wideband FM). • Easily entered and managed lists of stations simplify station selection. • Export and import lists of stations in CSV or TSV format. • Adjustable squelch that works for both AM and FM signals. • Adjustable LNA gain (for RTL-SDR and SDRplay radios). • Adjustable audio high pass and low pass filters. • Audio AGC for AM, optimized for aircraft communications. • Selectable IQ Offset eliminates DC errors. • DC Blocker option reduces spurious errors. • Signal strength indicator that shows power level in the signal passband. • Multiple sampling rates to accommodate different network bandwidths. • Selectable 8-bit or 16-bit sample size streaming from Airspy HF+ and SDRplay radios. • Option to play audio over AirPlay to a HomePod, HomePod mini or any AirPlay compatible device. • Stream synchronized audio to multiple AirPlay 2 compatible devices. • Lock Screen shows controls and streaming station information. • Custom URLs enable another application on the same device to set the station and start streaming. • Supports VoiceOver. SDR Receiver processes signals that are streamed over the network from a host computer (Mac, PC or Raspberry Pi) that is attached by USB bus to an RTL-SDR, Airspy HF+ or SDRplay radio. An rtl_tcp server or equivalent application running on the host computer receives baseband IQ data from the radio and streams the sampled signals over the network to the iPhone or iPad running SDR Receiver. Requires an RTL-SDR, Airspy HF+ or SDRplay radio and a host computer which are not provided with the application. Support for 192 ksps and 384 ksps Airspy HF+ sampling rates requires Airspy HF+ firmware version R3.0.7 or later, and hfp_tcp version v.1.2.117 or later.
RSS Radar
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FEED MANAGEMENT: Users can add new feeds by entering an RSS URL or selecting from a predefined list of hundreds of feeds. Feeds can also be deleted or reordered. FEED CLASSIFICATION: Group your feeds into categories and sort them. AUTOMATIC FEED UPDATES: Automatically refreshes feed articles after an user-defined interval set in the app's settings. OPML IMPORT/EXPORT: Easily manage your feeds with the new OPML import/export functionality. ARTICLE INDEXING: Indexes new articles upon reading for enhanced searchability. ADVANCED SEARCH QUERIES: Users can create multiple search queries using a Query Builder to search through content. QUERY AS FEED: Allows users to set a search query as a feed, displaying it on the main screen alongside other feeds. ALERTS AND NOTIFICATIONS: Users can designate a query as an alert and receive notifications for content of interest. CONTENT INTERACTION OPTIONS: Users can visit the original website, enter in read mode, or bookmark for later reading. READ/UNREAD TRACKING: The app tracks which articles have been read or remain unread, with options to mark them individually or in bulk. QUERY INSIGHTS: In the Queries section, alongside found articles, users can see relevance and sentiment scores. SENTIMENT ANALYSIS: Provides a Sentiment chart for individual queries, allowing for sentiment analysis. EXCEL EXPORT: Users can export query results to Excel. DATA EXPORT/IMPORT: Enables users to export all data from the RSS Radar app and import previously exported data, facilitating sharing between devices. THEME SELECTION: Light or Dark. Change font size for better reading. PRIVACY-FOCUSED: All app functionality occurs on the user's device without the intervention of cloud services, ensuring a high level of privacy and security for users' data and activities.
Screenshots
Verdict
The clearest difference is price: RSS Radar at $7.99 against SDR Receiver's $9.99. RSS Radar also leads on device support (4 vs 2) and iOS requirement (14.2 vs 17.0). On update cadence, ads and in-app purchases 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
SDR Receiver costs $9.99 and RSS Radar $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
SDR Receiver ships an update every 4 months, RSS Radar every 3 months. The most recent releases landed on September 18, 2026 and September 19, 2026 respectively.
| Parameter | SDR Receiver | RSS Radar |
|---|---|---|
| Price | $9.99 | $7.99 — better |
| Rating | 4.1 (15 ratings) — better | — |
| Positive reviews | 72.0% of reviews | — |
| Number of ratings | 15 — better | — |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 17.0 | 14.2 — better |
| Further details — not scored | ||
| Size | 2 MB | 114 MB |
| Age rating | 4+ | 17+ |
| Developer | Transition Technology Ventures, LLC | Dejan Petrovic |
In-app purchases
SDR Receiver
No in-app purchases
RSS Radar
No in-app purchases









