Music Spectrograph vs Loop Slower
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Music Spectrograph
Visually reverse engineer sound and music in real-time with a live MIDI piano roll displaying pitch and frequency. Slow down or stop audio to analyze musical patterns, aiding in music transcription and learning.
- Real-time MIDI piano roll
- Pitch and frequency visualization
- Slow down and stop audio
- Music transcription aid
- Adjustable playback speed
- Color-coded pitch graph
Read full descriptionHide full description
Music Spectrograph allows you to visually reverse engineer sound and music, in real-time. See a live MIDI piano roll showing pitch and frequency. When playing music files, you can slow down, and even stop sound in time. Music Spectrograph is being using in college music programs to aid in learning music transcription. The Hotpaw Music Spectrograph presents a high-resolution scrolling spectrogram as you listen, so that you can see these patterns in sound and music, as well as how sound corresponds to notes on a piano keyboard. This piano alignment makes it far easier to spot which frequencies in sounds correspond to which musical notes. Features include: - 12th-octave MIDI-pitch-centered spectrograph (also called a sonogram) - Usable with live audio, tunes from your iOS device's music library, or a file downloaded via a URL (web address) - Records up to a 4 minute spectrograph history you can stop, scroll back and review - Slow Down music files by up to 8X, or speed music up by 3X to skip sections faster - Stop music in time, and still hear the music frequencies present via re-synthesis (scroll back a little in time to bring up the ReSynth switch). - Play tunes in mono, left or right channel only, or with center-panned vocals reduced - Color the pitch graph to see if notes are in-tune or out-of-tune - Color the spectrograph for loudness, or graph in black-and-white or with Pastel colors - Mid-pitch filtering to remove some of the higher overtones Use the Input? button to select a tune from your library (DRM protected iTunes files not supported). Use the Gear button to select among several viewing modes. There's a volume control to manually set the sensitivity threshold. Stop playing or recording to scroll back and review or resynthesize sound. Touch the keyboard during resynthesis to isolate one note. For many musical sounds, this app will show you many overtones and harmonics, not just the fundamental pitch of notes. Some musical experience is required to tell musical notes from their overtones and harmonic frequencies.
Loop Slower
Read full descriptionHide full description
A simple tool that allows you to loop a section of a song and adjust the playback speed. Perfect for anyone who’s practicing an instrument and want to jam along at desired speed, or when transcribing a song. The app offers: - Changing playback speed - Looping particular section of a song - Saving loops and speed per song automatically - Searching and playing songs from your library (on device) - Searching and playing songs on Apple Music* - Recently played songs for quick access * playing full songs on Apple Music requires an active Apple Music subscription.
Screenshots
Verdict
The clearest difference is price: Loop Slower at $0.99 against Music Spectrograph's $9.99. Music Spectrograph's advantage is update cadence (every 6 weeks vs every 12 months) and iOS requirement (12.4 vs 17.1). On ads, in-app purchases 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
Music Spectrograph costs $9.99 and Loop Slower $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Music Spectrograph ships an update every 6 weeks, Loop Slower every 12 months. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.
| Parameter | Music Spectrograph | Loop Slower |
|---|---|---|
| Price | $9.99 | $0.99 — better |
| Rating | 2.5 (4 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 6 weeks — better | Every 12 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.4 — better | 17.1 |
| Further details — not scored | ||
| Size | 1 MB | 5 MB |
| Age rating | 4+ | 9+ |
| Developer | HotPaw Productions | Algirdas Gridziuska |
In-app purchases
Music Spectrograph
No in-app purchases
Loop Slower
No in-app purchases
Questions
Is Music Spectrograph free?
Is Loop Slower free?
Do Music Spectrograph or Loop Slower have ads?
Which is updated more often, Music Spectrograph or Loop Slower?
Other comparisons















