Comparison

RST Decoder Pro vs SnapClass

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RST Decoder Pro

This application decodes Morse code from your device's microphone, offering two decoding methods (BPF and FFT) with adjustable parameters. It includes features like automatic frequency detection, gain control, and real-time signal display for accurate Morse code practice and reception.

Highlights
  • Microphone Morse code decoding
  • BPF and FFT decoding methods
  • Auto Frequency Detector (AFD)
  • Auto Gain Control (AGC)
  • Real-time CW signal display
  • Waterfall display (Pro version)
  • Adjustable control parameters
Read full description

This is an App that decodes Morse code input from the microphone. I recommend that you try the basic functions and usage with the free version before purchasing. It is a Morse practice App that you can use to check if you are keying the correct code. Signals with good S/N can be decoded correctly, but signals with bad S/N cannot be decoded correctly. Also, the performance will be degraded for extremely slow or fast signals. Usually about 5 to 10 characters are required for speed synchronization of Morse Code. Adjust the input signal so that the peak value changes from level 6 to level 7. Make fine adjustments to each parameter according to the reception status. [Additional Functions] -In addition to the decoder using BPF, a new decoder using FFT has been added so that it can be switched according to the usage. -AFD (Auto Frequency Detector) function has been added to the decoder using BPF, and BPF can be set automatically by pressing the AFD button. -The decoder using FFT automatically follows the strongest signal in the band by AFD (Auto Frequency Detector) and AGC (Auto Gain Control). You can also hold the AFD / AGC parameters by pressing the Lock button. * There will be a time lag of about 1 to 2 seconds for AFD tracking. * The Pro version also supports waterfall display. [Control parameters] 1.Language select English and Japanese(KANA) 2.Audio Input Level 3.BPF ON/OFF 4.BPF of Center Frequency 5.BPF of Band Width 6.BPF of Shape 7.Notch ON/OFF 8.Notch of Center Frequency 9.CW Speed Control ON/OFF 10.CW Speed Control Low, Mid1, Mid2 or High 11.Delete All Decoded Text 12.Realtime CW Signal Display 13.Input signal recording function. 14.Playback function from the file list. 15.Support the Garbage Data reduction function [Note] Since the signal after BPF is output to the audio output, it can also be used as an AF-CW filter. [URL of this App(Free version) working example video] The GUI is slightly different, but the basic functionality is the same. https://youtu.be/Pwp7W4m-m34

About

SnapClass

Read full description

SnapClass: The Ultimate Student Note Organizer Tired of scrolling through thousands of photos to find that one whiteboard picture from last week? SnapClass is here to save your semester! SnapClass is designed specifically for students who want to keep their class notes organized and accessible. Just snap a photo of the whiteboard or notebook, and let the app handle the rest. KEY FEATURES: Smart Organization: No more cluttered gallery! Photos are automatically saved directly into subject-specific folders like Math, History, or Physics. Smart Schedule: Input your class schedule, and SnapClass will know exactly which class you are in. Open the app, and it is ready to save notes to the right course instantly. Export to PDF: Create professional-looking PDFs from your note images in seconds. Share them with classmates via messaging apps or Email. Image Editing: Crop, rotate, and enhance your whiteboard photos for better readability. Invite and Earn Premium: Invite friends to SnapClass and earn free Premium access for both of you!

Screenshots

RST Decoder Pro4 screens
SnapClass4 screens

Verdict

The call

The clearest difference is price: SnapClass at Free against RST Decoder Pro's $1.99. SnapClass also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On 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

CostPrice · In-app purchases · Ads · Monetization

SnapClass is free to download; RST Decoder Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard3 real differences · 7 level
RST Decoder Pro versus SnapClass: the parameters behind the verdict, then further details
ParameterRST Decoder ProSnapClass
Price$1.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings1 — better—
Update frequencyMonthly—
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size1 MB40 MB
Age rating17+4+
Developerkoji kamogawaBekir CAGLAR

In-app purchases

None

RST Decoder Pro

No in-app purchases

None

SnapClass

No in-app purchases

Questions

Is RST Decoder Pro free?
RST Decoder Pro costs $1.99, with no in-app purchases.
Is SnapClass free?
SnapClass is free to download, with no in-app purchases.
Do RST Decoder Pro or SnapClass have ads?
Neither RST Decoder Pro nor SnapClass shows ads.

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