Audio Spectrum Viewer vs Toolkit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Audio Spectrum Viewer
Visualize the frequency content of your live audio environment with a dynamic waterfall spectrogram. Analyze sound systems, create audio fingerprints of environmental sounds, and save spectrograms with custom captions. Capture audio in the background for simultaneous recording and photography.
- Live audio frequency visualization
- Waterfall/spectrogram display
- Speaker and sound system analysis
- Environmental sound fingerprinting
- User-selectable gain and sample rate
- Save spectrograms with captions
- Save audio clips for playback
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Audio Spectrum Viewer is an easy to use app which will show the frequency content of your live audio environment in an easy to understand waterfall / spectrogram. This tool can be used to analyze the performance of speakers and sound systems, and to create audio fingerprint images of environmental sounds such as bird songs and other animal sounds. Audio Spectrum Viewer is a powerful tool with user-selectable gain, sample rate and other parameters to optimize for a particular setting. Spectrograms can be saved to the camera roll with a timestamped and customizable caption and the audio clips can be saved for later playback. Audio can be captured in the background so you can simultaneously take photos of birds while analyzing their sounds.
Toolkit
This app consolidates essential daily productivity tools into a single, minimalist interface. It offers functionalities like QR code scanning and generation, PDF scanning, OCR, currency and unit conversion, and image conversion, eliminating the need for multiple applications.
- QR/Barcode Reader & Generator
- PDF Scanner
- OCR Text Extraction
- Currency Converter
- Unit Converter
- Image Converter
- Text-to-Speech
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Toolkit is the ultimate iOS toolbox, equipped with all the essential tools you need for your daily productivity. The idea is to bring you with an all in one app that fits all your needs, offering multiple functionalities. From now on, embrace minimalism. No more unnecessary complexity, no need for dozens of apps, and no more endless searching. — All useful Tools - QR/Barcode Reader: Read QR and Barcodes. - QR/Barcode Generator: Generate QR and Barcodes in one click. - PDF Scanner: Scan & generate PDF documents. - OCR Reader: Extract text from image. - Currency Converter: Convert from and to any currency with realtime rate. - Unit Converter: Convert between measurement units. - Image Converter: Convert HEIC & other images to JPEG or PNG. - Text To Speech: Convert texts into spoken audio — Request Tools You're in control. Request a tool, and we will work to bring it to the toolkit. — No Login Needed You don't need to sign up or login in any way, just go forward and start using the tools. — No Ads Enjoy an ad free experience and use the tools without distraction or advertisements. — Easy User Interface We always prioritize simplicity and ease of use, that's why we designed an easy user interface. — If you have any questions or suggestions, feel free to get in touch. — EULA https://sites.google.com/view/overflow-llc/eula — Privacy Policy https://sites.google.com/view/overflow-llc/privacy-policy — Terms Of Service https://sites.google.com/view/overflow-llc/terms-of-service
Screenshots
Verdict
The clearest difference is price: Toolkit at Free against Audio Spectrum Viewer's $0.99. Toolkit also leads on rating (5.0 vs 4.3) and update cadence (every 10 days vs every 72 months). Audio Spectrum Viewer's advantage is in-app purchases (none vs 3) and ratings volume (4 vs 1). On ads, device support and iOS requirement 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
Toolkit is free to download; Audio Spectrum Viewer costs $0.99 up front. Toolkit sells 3 in-app purchases, starting at $5.99 per month. Audio Spectrum Viewer asks for nothing beyond the download.
Toolkit holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 4 and 1 respectively.
Audio Spectrum Viewer ships an update every 72 months, Toolkit every 10 days. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.
| Parameter | Audio Spectrum Viewer | Toolkit |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.3 (4 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 72 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Steve Glenner | Overflow LTD |
Customer experience
Audio Spectrum Viewer
Toolkit
In-app purchases
Audio Spectrum Viewer
No in-app purchases
Toolkit
- Monthly3 Days trial$5.991 Month
- Yearly3 Days trial$17.991 Year
- Lifetime$39.99
Questions
Is Audio Spectrum Viewer free?
Is Toolkit free?
Which has better reviews, Audio Spectrum Viewer or Toolkit?
Do Audio Spectrum Viewer or Toolkit have ads?
Which is updated more often, Audio Spectrum Viewer or Toolkit?
Other comparisons
