Comparison

KeepWaves vs Spectrum Analyzer

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

Head to head
About

KeepWaves

Transform audio recordings into visual art with customizable waveform visualizations. Capture high-quality sound, apply effects, and share your unique acoustic memories as audio, images, or videos. Preserve precious sounds in a way that engages both sight and hearing.

Highlights
  • Customizable waveform visualizations
  • High-quality audio recording
  • Real-time visualization
  • Advanced audio processing
  • Multiple export options (audio, image, video)
  • Intuitive organization and search
  • Interactive playback
Features
Read full description

Record sound and turn it into a visual memory with KeepWaves. Capture audio, explore its waveform and customize how your recording looks when you share it. RECORD AND PLAY Record with adjustable sensitivity and gain. Play saved audio with waveform scrubbing and playback controls. MAKE IT YOURS Customize waveform colors, backgrounds and visual settings. Adjust your audio with the available processing controls and select the range you want to export. SAVE AND SHARE Organize and search saved recordings. Export audio, waveform images or videos to share through the apps you choose. KeepWaves Pro is required to make new recordings. Existing recordings remain available to play and export without an active subscription. Monthly and yearly subscriptions are available. Keep your own backups of important recordings. SUBSCRIPTION DETAILS The store shows the price, billing period and any eligible introductory offer before purchase. Payment is charged to your Apple Account at confirmation. Subscriptions renew automatically unless canceled before the renewal deadline shown by the store. Manage or cancel through your store subscription settings. Restore Purchases checks eligible existing access. Terms of Use: https://keepwaves.com/terms Privacy Policy: https://keepwaves.com/privacy

About

Spectrum Analyzer

Visualize sound frequencies, waveforms, and spectral activity in real-time using your device's microphone. Analyze audio for tuning, testing, music, or exploring ambient sounds with clear visual representations.

Highlights
  • Real-time audio spectrum analysis
  • FFT frequency analysis
  • Live spectrogram visualization
  • Audio waveform display
  • Frequency and amplitude monitoring
  • Microphone-based sound analysis
Features
Read full description

See sound in real time with Spectrum Analyzer: Audio RTA, a powerful audio analysis tool for visualizing frequencies, waveforms and spectral activity through your device’s microphone. Whether you are tuning speakers, examining music, testing audio equipment, identifying troublesome frequencies or simply exploring the sounds around you, the app gives you a clear and responsive view of your audio signal. REAL-TIME AUDIO SPECTRUM ANALYSIS View the frequency content of live sound as it happens. The spectrum analyzer separates the incoming audio into frequency components, making it easier to identify peaks, harmonics, resonance and changes across the sound spectrum. FFT FREQUENCY ANALYZER Use Fast Fourier Transform analysis to examine the frequencies present in music, speech, instruments, speakers and environmental sound. Follow frequency peaks and observe how the signal changes over time. LIVE SPECTROGRAM Turn sound into an easy-to-read visual frequency map. The spectrogram displays how frequency intensity develops over time, helping you recognize tones, harmonics, patterns and transient sounds. AUDIO WAVEFORM DISPLAY Watch the shape and amplitude of the microphone signal in real time. The waveform view provides a direct visual representation of changes in volume and signal behaviour. RTA FOR AUDIO TESTING Use your iPhone or iPad as a convenient real-time analyzer for: • Speaker and stereo testing • Room and acoustic checks • Music and instrument analysis • Identifying frequency peaks • Monitoring background noise • Examining voices and sound effects • Audio equipment testing • Learning about sound and frequencies UNDERSTAND THE SOUNDS AROUND YOU Spectrum Analyzer: Audio RTA helps reveal details that are difficult to recognize by listening alone. Observe low, mid and high frequencies, compare different sounds and discover how every audio source creates its own spectral pattern. DESIGNED FOR QUICK, CLEAR ANALYSIS The responsive interface makes it easy to move between audio analysis views and focus on the information you need. Use it for technical checks, music production, education, acoustic experiments or everyday sound exploration. KEY FEATURES • Real-time audio spectrum analyzer • FFT frequency analysis • Live spectrogram visualization • Audio waveform display • Frequency and amplitude monitoring • Microphone-based sound analysis • Clear visual representation of audio signals • Support for both portrait and landscape use • Useful for speakers, music, voices and environmental noise From simple sound experiments to detailed frequency inspection, Spectrum Analyzer: Audio RTA puts a capable audio visualization tool in your pocket. Download the app and start seeing the frequencies hidden inside every sound. Privacy Policy: https://www.devtreelabs.com/privacy Terms of Use. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

KeepWaves4 screens
Spectrum Analyzer4 screens

Verdict

The call

The clearest difference is rating: KeepWaves at 5.0 against Spectrum Analyzer's 1.0. KeepWaves also leads on in-app purchases (none vs 2) and iOS requirement (15.0 vs 17.6). Spectrum Analyzer's advantage is update cadence (monthly vs every 19 months). On price, ratings volume, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Spectrum Analyzer sells 2 in-app purchases, starting at $4.99 per 7 days. KeepWaves asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

KeepWaves holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

KeepWaves ships an update every 19 months, Spectrum Analyzer monthly. The most recent releases landed on October 13, 2026 and October 1, 2026 respectively.

Scorecard5 real differences · 4 level
KeepWaves versus Spectrum Analyzer: the parameters behind the verdict, then further details
ParameterKeepWavesSpectrum Analyzer
PriceFreeFree
Rating5.0 (1 ratings) — better1.0 (1 ratings)
Number of ratings11
Update frequencyEvery 19 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size15 MB21 MB
Age rating4+4+
DeveloperArla Servicesbrian koech

Customer experience

KeepWaves

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Spectrum Analyzer

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

KeepWaves

No in-app purchases

2 purchases

Spectrum Analyzer

Subscriptions2
  • pro weekly3 Days trial$4.997 Days
  • pro annual$29.991 Year

Questions

Is KeepWaves free?
KeepWaves is free to download, with no in-app purchases.
Is Spectrum Analyzer free?
Spectrum Analyzer is free to download, with in-app purchases available.
Which has better reviews, KeepWaves or Spectrum Analyzer?
KeepWaves is rated higher. KeepWaves averages 5.0 out of 5 from 1 ratings, while Spectrum Analyzer averages 1.0 from 1 ratings.
Do KeepWaves or Spectrum Analyzer have ads?
Neither KeepWaves nor Spectrum Analyzer shows ads.
Which is updated more often, KeepWaves or Spectrum Analyzer?
KeepWaves ships an update every 19 months, and Spectrum Analyzer monthly. Most recently, KeepWaves was updated on October 13, 2026 and Spectrum Analyzer on October 1, 2026.

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