Voice Recorder vs Simple Spectrogram
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Voice Recorder
Record, transcribe, and edit audio with professional quality and complete privacy. This app offers multiple recording modes, speech-to-text conversion, and secure storage for all your audio needs.
- High-quality audio recording
- Speech-to-text transcription
- Visual waveform audio editing
- Secure Private Vault with PIN lock
- Multiple professional recording modes
- Export audio and transcripts
- Import audio and extract from video
Read full descriptionHide full description
Voice Recorder - Audio Studio is an all-in-one voice recorder for recording, transcription, editing, organizing, and securely storing audio—with professional quality and complete privacy. Whether you’re capturing meetings, lectures, interviews, voice memos, study sessions, or creative ideas, Voice Recorder makes it easy to record every important moment and find it again whenever you need it. WHY YOU’LL LOVE VOICE RECORDER • Record high-quality audio with a clean, intuitive recorder • Convert speech to text with built-in transcription • Reduce background noise for clearer recordings • Trim and crop with a visual waveform editor • Export audio as MP3, WAV, M4A, and AAC—or share transcripts as PDF and TXT • Protect sensitive recordings with Private Vault and optional PIN lock • Search recordings instantly and organize everything by date • Import audio files or extract audio from videos PROFESSIONAL RECORDING MODES Choose the best mode for every situation. • Standard • Studio • Pro • Meeting • Lecture • Interview Optimized to help capture clearer recordings in different environments. TRANSCRIBE SPEECH TO TEXT Convert spoken words into readable text using Apple Speech Recognition. • View transcripts inside the app • Copy transcripts instantly • Retranscribe whenever needed • Keep transcripts saved on your device POWERFUL AUDIO EDITING Edit recordings without affecting the original file. • Trim unwanted sections • Crop audio precisely • Preserve the original recording • Visual waveform editing for accurate control EXPORT & SHARE Share recordings in the format you need. • Export audio as MP3, WAV, M4A, and AAC • Share transcripts as PDF or TXT • Send recordings using your favorite apps • Export without changing the original recording PRIVATE BY DESIGN Your recordings belong to you. • All recordings stay on your device • No account required • No sign-up required • You control what gets shared • Store sensitive recordings in Secure Vault with optional PIN protection PERFECT FOR • Meetings • Lectures • Voice Memos • Interviews • Students • Professionals • Journalists • Content Creators • Podcasters • Researchers • Personal Reminders PREMIUM Unlock Premium for even more powerful features. • Unlimited AI Transcription • Secure Private Vault • Premium Export Formats • Video to Audio Conversion • New premium features in future updates Eligible subscriptions include a 3-day free trial. After the trial ends, payment will be charged to your Apple ID account. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current billing period. Your account will be charged for renewal within 24 hours before the current period ends. Terms of Use: https://aivoicerecorderpolicy.blogspot.com/p/terms-of-use-last-updated-may-2026.html Privacy Policy: https://aivoicerecorderpolicy.blogspot.com/p/privacy-policy.html Download Voice Recorder - Audio Studio today to record, transcribe, edit, organize, and securely manage your audio—all in one place.
Simple Spectrogram
Visualize sound frequencies in real-time with a dynamic spectrogram. Analyze audio, identify musical notes, and adjust display settings for detailed sound inspection. Audio processing is done entirely on-device, ensuring privacy.
- Real-time spectrogram visualization
- Logarithmic frequency scale
- Identify musical notes and frequencies
- Pause and inspect audio slices
- Adjustable frequency range and contrast
- Portrait and landscape support
Read full descriptionHide full description
See the frequencies in the sound around you. Spectrogram turns your microphone input into a smooth, real-time spectrogram with a clear logarithmic frequency scale and Inferno colors. • Watch sound evolve over time, with the newest audio at the top. • Pause and tap any slice to inspect its frequency spectrum. • Tap or drag on the spectrum to find nearby peaks and their exact frequencies. • See the nearest musical note and the difference in hertz and cents, referenced to A4 = 440 Hz. • Adjust the frequency range, noise floor, and contrast. • Use portrait or landscape on iPhone and iPad. Audio is analyzed on your device in memory. It is never recorded, uploaded, or shared. No account, ads, or tracking. Musical note labels describe individual spectral peaks, which may be harmonics rather than a sound’s fundamental frequency.
Screenshots
Verdict
The clearest difference is in-app purchases: Simple Spectrogram at none against Voice Recorder's 4. Simple Spectrogram also leads on ads (none vs shown). On price, rating, ratings volume 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. Voice Recorder sells 4 in-app purchases, starting at $4.99 per 7 days. Simple Spectrogram asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Voice Recorder against 5.0 for Simple Spectrogram. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
| Parameter | Voice Recorder | Simple Spectrogram |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Fortnightly | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 87 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Muhammad Umer | DANIEL LAWRENCE LU |
In-app purchases
Voice Recorder
- Weekly Plan3 Days trial$4.997 Days
- Weekly Plan3 Days trial$9.997 Days
- Yearly Plan$24.991 Year
Show 1 moreShow fewer
- Yearly Plan$49.991 Year
Simple Spectrogram
No in-app purchases





