Comparison

Spectrojam vs Ferromagnetic

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

Head to head
About

Spectrojam

This app transforms sounds from your microphone into dynamic colors and shapes on your screen. It visualizes the frequency composition of everyday noises and musical tunes, allowing you to see sound signatures and even translate them into musical notes.

Highlights
  • Real-time sound to color/shape visualization
  • Musical note display for pitch accuracy
  • Chord and harmony analysis
  • Adjustable gain for volume control
  • High-resolution premium visualizer
  • Color modulation effects
Features
Read full description

Spectrojam® listens to your microphone and turns the sound it hears into colors and shapes on your screen. If you speak, for example, you will see the individual frequencies emitted by your voice. If you whistle, you will see shapes and colors move and change on the screen in perfect sync with your tune. You will be amazed to see the frequency composition of the sounds in your everyday life. Each noise has a unique signature, and now you can see it all! The Musical Note Display can translate the sounds you make into musical notes. This allows anyone to sing a perfect "A" without even hearing a reference note. Spectrojam® can display up to 3 musical notes at the same time, allowing you to pick apart chords and harmonies. It works great with the human voice and musical instruments. Unlock Premium mode to access a high-resolution sound visualizer which displays up to 12.3 million samples simultaneously (8,192 frequencies * 1500 time slices) for extremely high precision and maximum clarity. The Color Modulator smoothly cycles through your color selections, producing stunning visuals. If your environment is loud, simply use the Gain slider to reduce the overall input volume, or boost it if you want to detect whispers, breathing, and quiet background music. Explore your world in a whole new way. Download Spectrojam® today!

About

Ferromagnetic

Transform music into real-time visual art with dynamic audio-reactive effects. Enhance personal listening, create ambiance for gatherings, or perform live with captivating visuals that sync to every beat. Offers thousands of unique visual combinations for a fresh experience with every song.

Highlights
  • Real-time audio-reactive visuals
  • Multi-band frequency analysis
  • Automatic beat detection
  • Metal-powered rendering engine
  • Multi-layer compositing system
  • Customizable visual parameters
  • Thousands of unique visual combinations
Features
Read full description

Ferromagnetic: Music Visualizer & VJ App for iPhone, iPad, and Mac Ferromagnetic turns Spotify, SoundCloud, YouTube, and any other sound into stunning real-time visuals. It's a professional audio visualizer for everyone, from home listening and house parties to DJ sets, live shows, and VJ performances. FM Visualizer: Effortless Background Visuals Start a System Broadcast and Ferromagnetic follows the audio of Spotify, SoundCloud, YouTube, and most other apps on your device. Or use the microphone to visualize anything around you, from a DJ set to a live band. The 12-band frequency analysis and tunable beat detection catch every beat and note, and a GPU-accelerated Metal engine renders it all in multiple layers. Pick a Vibe like Calm, Energetic, Trippy, or Retro to set the mood in one tap. Or let Ferromagnetic take the wheel and build new scenes on its own from over 1,000 combinations. Set how fast the scenes change and choose from ten transition styles, including Morph, Zoom, and Color Distance. Choose from over 20 audio-reactive effects: the signature Ferrofluid and Electromagnetic fields, plus Starfield, Petals, Laser, Glitter, Cloud, Refractions, and more. Build your own scene from three effect layers and particles, each with its own blend mode, and tune every layer to the bass or the highs. Particles burst and flow with the sound, and glitch and shake hit harder as the volume rises. Transform the image with Kaleidoscope, Droste Spiral, Voronoi Mirror, or Tunnel, then shape the look with pixelation, dithering, blur, and color palettes like Vivid, Warm, or Triadic. Show your own logo text on screen, perfect for cafes, bars, and venues. Mirror the visuals to a TV or projector with AirPlay or a cable, and the screen stays awake for as long as the music plays. Visuals render at up to 60 fps. FM Producer: Live Visual Performance On iPad, FM Producer turns Ferromagnetic into a VJ app for live shows. The dual-deck interface works like a DJ controller: prepare the next scene on one deck, then crossfade it in. Add the iPad camera or NDI® sources as live layers, and send your visuals to OBS, Resolume, and other apps with NDI output. Connect a MIDI controller or keyboard, map any control with MIDI Learn, and trigger effects and scenes without touching the screen. FM Producer also unlocks the complete Mac app, with video, image, and 3D model layers, presets, and video recording. Try It Free Download Ferromagnetic for free, then unlock only what you need with an affordable subscription or a one-time purchase. One purchase works on iPhone, iPad, and Mac. Already on FM Visualizer? Your purchase counts toward FM Producer. NDI® is a registered trademark of Vizrt NDI AB. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

Screenshots

Spectrojam4 screens
Ferromagnetic4 screens

Verdict

The call

The clearest difference is update cadence: Ferromagnetic at weekly against Spectrojam's every 3 months. Ferromagnetic also leads on rating (4.1 vs 3.9) and review sentiment (80% vs 69%). On price, ratings volume, ads and in-app purchases 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. Spectrojam sells 1 one-off in-app purchase and Ferromagnetic sells 6 in-app purchases, starting at $2.49 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Ferromagnetic holds the better App Store score, 4.1 against 3.9. Both are backed by a comparable volume of ratings — 25 and 26 respectively. Written reviews point the same way: 69% of Spectrojam's written reviews are positive against 80% of Ferromagnetic's.

UpkeepUpdate frequency

Spectrojam ships an update every 3 months, Ferromagnetic weekly. The most recent releases landed on September 16, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 7 level
Spectrojam versus Ferromagnetic: the parameters behind the verdict, then further details
ParameterSpectrojamFerromagnetic
PriceFreeFree
Rating3.9 (25 ratings)4.1 (26 ratings) — better
Positive reviews69.2% of reviews79.7% of reviews — better
Number of ratings2526 — better
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.0 — better16.0
Further details — not scored
Size67 MB23 MB
Age rating4+4+
DeveloperNonsequential Time LabsDaniel Eke

Customer experience

Spectrojam

All ratings25 ratings
Positive72.0%
Neutral4.0%
Negative24.0%
Written reviews13 reviews
Positive69.2%
Neutral7.7%
Negative23.1%

Ferromagnetic

All ratings25 ratings
Positive76.0%
Neutral4.0%
Negative20.0%
Written reviews69 reviews
Positive79.7%
Neutral7.2%
Negative13.0%

Bugs and requests

Spectrojam

Not enough reviews yet to summarise bugs or requests.

Ferromagnetic

Reported bugs

14 issues
  • Song titles don’t update
  • Custom image wasn’t saving in presets (reported fixed)
  • Logo makes imported images blurry
  • App crashes on launch
  • Poorly implemented controls (MacOS)
Show 9 more
  • Does not work with Apple Music for some users
  • Does not sync with music for some users
  • Repeating visualizer scenes
  • Shoddy integration with Streamlabs
  • Does not work with microphone for some users
  • Visuals are seemingly random and endless
  • App asks to update when there's no update
  • Crashes every time audio input is changed after update
  • Recurring shapes pop up every few seconds

Requested features

20 requests
  • Add a 'go back' button for controls
  • Add Airplay mirroring or tvOS app
  • More options in visualizer types
  • Configurable presets for cycling settings
  • Ability to stream to TV without a cable
Show 15 more
  • Apple TV app development
  • More shaders and 4k-8k resolution options
  • More options to customize and create own shaders
  • More style options (e.g., retro equalizer, symmetric bars)
  • Ability to navigate a catalog or favorite visuals
  • Rotation feature for effects
  • Output to a file without screen capture
  • Choose output frame rate and size
  • Get rid of or manipulate recurring shapes
  • Remove Source/editor column from viewer window
  • Option to load songs directly from user's library
  • Transparency option for windows
  • More customization options
  • Effects inspired by Apple's classic visualizer
  • Bug fix for audio input crashes

In-app purchases

1 purchases

Spectrojam

One-time1
  • Premium$2.99
6 purchases

Ferromagnetic

Subscriptions2
  • FM Visualizer7 Days trial$2.491 Month
  • FM Producer3 Days trial$3.991 Month
One-time4
  • A generous tip$0.99
  • FM Visualizer One-TIme$14.99
  • FM Producer Upgrade$29.99
Show 1 more
  • FM Producer One-Time$49.99

Questions

Is Spectrojam free?
Spectrojam is free to download, with in-app purchases available.
Is Ferromagnetic free?
Ferromagnetic is free to download, with in-app purchases available.
Which has better reviews, Spectrojam or Ferromagnetic?
Ferromagnetic is rated higher. Spectrojam averages 3.9 out of 5 from 25 ratings, while Ferromagnetic averages 4.1 from 26 ratings.
Do Spectrojam or Ferromagnetic have ads?
Neither Spectrojam nor Ferromagnetic shows ads.
Which is updated more often, Spectrojam or Ferromagnetic?
Spectrojam ships an update every 3 months, and Ferromagnetic weekly. Most recently, Spectrojam was updated on September 16, 2026 and Ferromagnetic on October 8, 2026.

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