Flash Studio vs Spectrum SDR (RTL
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flash Studio
Manage your 3D printers remotely from your smartphone. Monitor print status, view live video feeds of your printer's operations, and control multiple printers simultaneously.
- Remote printer monitoring
- Real-time video feed
- Manage grouped printers
- On-the-go management
- Smartphone integration
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Flash Studio is an integrated mobile app developed by FLASHFORGE for on-the-go management of 3D printers. Users can monitor print status via smartphones, view real-time video of printer operations remotely, and efficiently manage grouped 3D printers.
Spectrum SDR (RTL
Explore radio signals with your RTL-SDR dongle. Listen to AM/FM/SSB/CW, view FFT and waterfall displays, and customize your experience. Requires a remote rtl_tcp instance over WiFi.
- Full frequency range support
- AM, FM, SSB, CW reception
- FFT and Waterfall displays
- Adjustable sample rates
- Bias tee and gain controls
- Squelch functionality
- Customizable display options
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This application is about having a bit of fun with those amazing little RTL-SDR dongles, whilst listening to AM/FM/SSB/CW radio signals. It's nice and easy to use so why not give it a try? - Covers the full frequency range of your RTL-SDR dongle. - AM and FM, wide and narrow, SSB, CW. - FFT and Waterfall displays. - Sample rates 240000 Hz to 2160000 Hz. - Bias tee control. - 75 presets over 5 pages. - Gain controls. - Squelch. - Flexible display options, hide things you don't need to see. - Built-in help. The application needs to be connected to an instance of rtl_tcp running on a remote computer, most likely over WiFi. You will need a good network connection for this to work reliably when using the higher sample rates. It can be installed on an iPhone, iPad or Apple Silicon Mac. We hope you enjoy using this application.
Screenshots
Verdict
The clearest difference is review sentiment: Spectrum SDR (RTL at 100% against Flash Studio's 56%. Spectrum SDR (RTL also leads on ads (none vs shown). Flash Studio's advantage is in-app purchases (none vs 1) and ratings volume (3.4K vs 2). On price, update cadence and device support 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
Both are free to download. Spectrum SDR (RTL sells 1 one-off in-app purchase. Flash Studio asks for nothing beyond the download.
Flash Studio holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Flash Studio has 3.4K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 56% of Flash Studio's written reviews are positive against 100% of Spectrum SDR (RTL's, so the app with the better star average is not the one people write more warmly about.
Flash Studio ships an update weekly, Spectrum SDR (RTL every 11 days. The most recent releases landed on September 28, 2026 and September 23, 2026 respectively.
| Parameter | Flash Studio | Spectrum SDR (RTL |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (3.4K ratings) — better | 4.5 (2 ratings) |
| Positive reviews | 55.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 3.4K — better | 2 |
| Update frequency | Weekly — better | Every 11 days |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 99 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | 浙江闪铸三维科技有限公司 | James Mainwaring |
Customer experience
Flash Studio
Spectrum SDR (RTL
In-app purchases
Flash Studio
No in-app purchases
Spectrum SDR (RTL
- Full Version$2.99
Questions
Is Flash Studio free?
Is Spectrum SDR (RTL free?
Which has better reviews, Flash Studio or Spectrum SDR (RTL?
Do Flash Studio or Spectrum SDR (RTL have ads?
Which is updated more often, Flash Studio or Spectrum SDR (RTL?
Other comparisons
