57
BU Score
Solid
Audio Spectrum Analyzer
✍️ BU Analytics Review
“
Audio Spectrum Analyzer is an iOS app from Black Cat Systems in the Utilities category, currently rated 3.9★ across 52 ratings. Initial signal reads as mostly critical sentiment so far — users flag rough edges and unmet expectations.
Our BU Score puts it at 57 — Solid (established niche player). For a Utilities app, that means established niche player.
Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.
creator
📊 Performance Tracking LIVE
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 7 of 7 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($3.99)METRIC | +$2,800 | |
| great valueREVIEW | +$1,600 | |
| excellent appREVIEW | +$1,500 | |
| Mature app (15y old)METRIC | +$1,500 | |
| slowREVIEW | −$1,200 | |
| Single-language (English only)METRIC | −$400 | |
| Pre-traction phase (52 ratings)METRIC | −$300 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 1 MB🔞 4+📱 iOS 6.0+🔖 v1.5🔄 updated 9y ago🌐 EN📂 Utilities💰 Paid🚀 Launched 2010 (15y old)
📝 About this app
Spectrum Pad turns your iPad, iPhone, or iPod Touch into an audio spectrum analyzer. Frequencies up to 20 kHz can be displayed.
You can control the displayed frequency span, as well as the FFT size, from 1024 to 262144 bins.
A logarithmic display of the entire 10 Hz to 20 kHz frequency range is available, and the graph fill mode can be turned on and off, as well as the display of up to five frequency markers.
Filtering (averaging) can be applied to the spectrum, to smooth out variations.
You can turn on the Peak Hold to make it easier to see transient events, as well as adjust the decay rate.
Swiping with two fingers lets you adjust the brightness of the spectrum or the graticule grid overlay.
Tapping three times with two fingers will save a screenshot to your Photos.
One of several user selectable window functions can be used:
Rectangular
Hanning
Hamming
Tukey
Cosine
Lanczos
Blackman
You can control the displayed frequency span, as well as the FFT size, from 1024 to 262144 bins.
A logarithmic display of the entire 10 Hz to 20 kHz frequency range is available, and the graph fill mode can be turned on and off, as well as the display of up to five frequency markers.
Filtering (averaging) can be applied to the spectrum, to smooth out variations.
You can turn on the Peak Hold to make it easier to see transient events, as well as adjust the decay rate.
Swiping with two fingers lets you adjust the brightness of the spectrum or the graticule grid overlay.
Tapping three times with two fingers will save a screenshot to your Photos.
One of several user selectable window functions can be used:
Rectangular
Hanning
Hamming
Tukey
Cosine
Lanczos
Blackman
🆕 What's New · v1.5
This update from Apple will improve the functionality of this app. No new features are included.
Updates for iOS 10.3
Adds Blackman-Harris window
Adds volume indicator
Updates for iOS 10.3
Adds Blackman-Harris window
Adds volume indicator
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Audio Spectrum Analyzer
- Developer
- Black Cat Systems
- Bundle ID
- com.blackcatsystems.spectrumPad
- App Store URL
- Open in App Store
- Category
- Utilities
- Content rating
- 4+
- Languages
- EN
Company
- Website
- Not found
- Tagline
- Not found
- Description
- Black Cat Systems - Windows and macOS software, specializing in ham / shortwave radio, audio, and science related programs
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Not found
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $11.0K/mo
- Top-grossing rank
- Outside top 100 in US Utilities
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- http://twitter.com/BlackCatSystems
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- https://www.blackcatsystems.com/news.html
- Press / News
- Not found
Contacts & Socials
- Socials
- info@blackcatsystems.com
- Phone
- Not found
- Contact page
- Not found
- About page
- https://www.blackcatsystems.com/about.html
⭐Recent App Store Reviews40 latest · avg 3.58★ · 47.5% 5★ · 25.0% 1★
5★19 (48%)
4★6 (15%)
3★4 (10%)
2★1 (2%)
1★10 (25%)
+0 ratings/week
Praise: great ×11 excellent ×3 perfect ×2 awesome ×2 recommend ×1Complaints: bug ×1 refund ×1 broken ×1 terrible ×1
Top positive
★★★★★ Great app!
This is a great app! I use it all the time .... Especially to find troublesome hums, etc.…
★★★★★ Works
Works fine on my iPhone 5S. Great, simple little monitoring app. I bought it for the markers, which helps me kill feedback.…
Top negative
★☆☆☆☆ Doesn’t work
Doesn’t work with iPhone XR. Looks like it has t been updated in years. Not worth any money…
★☆☆☆☆ stopped working after about 3 minutes
but hey, does anyone’s design actually work nowadays?…
📈Ratings growth52 ratings+5100% lifetimeShow 3-year history estimate ▾
Tracked (42 weeks) Pre-tracking estimate (36 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
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