Audio Visualize vs K
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Audio Visualize
Transform your music listening into a vibrant visual experience. This app creates dynamic displays of waveforms, spectrums, and patterns that pulse with your music's rhythm. Perfect for music lovers who want to see their favorite songs come to life.
- Dynamic music visualization
- Customizable waveforms
- Vibrant spectrum displays
- Pulsating patterns
- Transforms listening into sensory experience
Read full descriptionHide full description
Turn music into light that breathes. Audio Visualize brings immersive listening, moving visuals and music video creation together. From rolling musical landscapes and flowing ink to particles and vinyl turntables, find a new setting for your favorite music. Bring lyrics and album art into the scene, enjoy the moment and make the look your own. HEAR MUSIC, SEE LIGHT Explore 3D scenes, colorful light and particle effects. Travel through star fields and tunnels, watch audio rings rise and fall, and find a scene for gentle melodies or driving beats. Enjoy expansive landscapes in horizontal view or immerse yourself in portrait. A NEW WAY TO ENJOY YOUR SONGS Switch to a vinyl player with a turntable, tonearm and lyrics. Turn album art into particles or add depth with 3D lyrics. Browse songs, albums, artists and playlists, and manage your queue to keep listening flowing. YOUR MUSIC, DIFFERENT SCENES Import local audio without digital copy protection, play built-in tracks, or browse Apple Music and listen to available previews. Eligible Apple Music subscribers can play full songs. Use the microphone to let music from speakers and sounds around you animate the visuals. MAKE THE LOOK YOUR OWN Choose colors and adjust sensitivity, speed, glow and particles. Change the viewpoint, rotate and zoom in supported effects. Settings are remembered separately for each effect, ready for your next listening session. RECORD THE LIGHT AS A VIDEO Record and preview your visualizations. Upgrade to Pro to save and share them, giving your music a visual work of its own. Capture a melody or experiment with scenes and colors, moving naturally from listening to creating. LISTEN AT YOUR OWN PACE Enjoy playback history, repeat, shuffle, a sleep timer and visual effects linked to playlists. From choosing a song to setting your phone down to listen, enjoy music your way. USE AND PURCHASE INFORMATION • Some effects and advanced features require Pro, available through a subscription or lifetime purchase. Saving and sharing videos require Pro. • Full Apple Music playback requires the appropriate subscription and authorization. Music and preview availability vary by region and track. • Full Apple Music songs are digitally protected and cannot be recorded directly into videos. Their visuals can use microphone input or pre-analyzed rhythms. To record sound, use local audio, available previews or microphone mode. Feedback: proxima.centauri0@gmail.com Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
K
Control your BOSS Katana Air amp and MIDI-capable pedals with this app. Select presets, adjust effects, and map MIDI CC codes for a full touch interface. Save, export, and import your settings for seamless live performance.
- Preset selection and retrieval
- Adjustable effect levels and toggles
- Tap tempo for delays
- Gain, Volume, and EQ controls
- Assignable MIDI CC mapping
- Save, export, and import presets
- Bluetooth device discovery
Read full descriptionHide full description
K-AIR MIDI is a midi enabled app which sends and receives MIDI messages and is designed to be a companion app for the BOSS Katana Air amp (original and EX) as well as midi capable foot pedals and controllers. Via the use of midi messages, the app can select/retrieve presets, adjust and toggle effects, and adjust some of the effects settings. The app provides a full touch interface as well as mapping of midi CC codes to most controls for midi controller or foot pedal use. Specific features include: - Preset selection which retrieves the preset and displays the preset's effects state and levels - Gauges for Boost, Mod, Fx, Delay 1, Delay 2, Reverb, and Ambience with level change (slider under the gauge) or on/off toggle (tapping the gauge) - Each effect displays the active effect colour and name, and tapping this will cycle through the three effects (green, red, yellow) - The effect assignment to each colour block can be swapped from the list of effects via the swap icon to the left of the effect colour block - Some effects settings are exposed and can be edited via the levels icon to the right of the effect colour block - Tap tempo can be set with a slider or tap for both delay 1 and delay 2, showing both BPM and millisecond intervals. The tap tempo also has a copy and half value copy feature between the two tap tempos - Faders for Gain and Volume control - Noise Gate setting - Preset EQ, Bass, Mid, Treble, and Global EQ settings - Selector switches for Amp Selector and Cabinet - Battery level indicator - Tuner - Decoupling of Fx/Delay and Mod/Boost so that all effects can be used simultaneously - Allows preset settings to be saved (including name updates) as well as exported and imported - Assignable Midi CC codes for most controls via a Midi learn mode feature (when activated, the app listens for incoming CC code and shows that code in the learned code box, simply tap the gauge or slider you wish to assign that code to). - Midi CC mapped controls can be used to select presets, toggle effects on/off, cycle through the effect block/colour, open effects settings, move faders (with an expression pedal or volume knob) and the same CC code can be assigned to more than one control when appropriate (i.e. one button to toggle the Fx and Boost at the same time) - Assigned CC codes are preserved as user settings and recalled when restarting the app and can also be exported to file and imported from file - Supports landscape, portrait, as well as split view - The screen is zoomable with pinch gesture. This is useful for Split View and resizing the Split View of this app to fit the screen - A bluetooth device discovery page is available from within the app (to view/select the connection state of the amp and any midi bluetooth pedals detected) This app is not meant or intended to replace the official BOSS BTS app, it simply exposes some of the most common settings that would be adjusted while playing. Note that the BTS app does not need to be running to use this app (in fact it is best if it isn't to avoid conflicting messaging). IMPORTANT: This app works with the BOSS Katana Air firmware version 2.0 (original and EX) amp with no guarantee of compatibility with future firmware releases. DISCLAIMER: By using K-AIR MIDI (the "Software"), you acknowledge and agree that the Software is provided on an "as is" basis, without any warranties or guarantees of any kind, whether expressed or implied. You assume all responsibility and risk for the use of this Software. You agree that you shall not hold the developer liable for any damages, losses, or liabilities, including but not limited to direct, indirect, incidental, special, consequential, or punitive damages, arising out of or in connection with the use of the Software. NOTE: This app is not affiliated with or endorsed by Roland Corporation in any way. BOSS is a registered trademark of Roland Corporation.
Screenshots
Verdict
The clearest difference is price: Audio Visualize at Free against K's $9.99. Audio Visualize also leads on update cadence (every 2 days vs every 4 weeks) and ratings volume (9 vs 1). K's advantage is rating (5.0 vs 3.6) and review sentiment (100% vs 62%). On 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
Audio Visualize is free to download; K costs $9.99 up front. Audio Visualize sells 3 in-app purchases, starting at $1.99 per 7 days. K asks for nothing beyond the download.
K holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: Audio Visualize has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 62% of Audio Visualize's written reviews are positive against 100% of K's.
Audio Visualize ships an update every 2 days, K every 4 weeks. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.
| Parameter | Audio Visualize | K |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 3.6 (9 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 61.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 9 — better | 1 |
| Update frequency | Every 2 days — better | Every 4 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 96 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | 博 彭 | Stephane Villeneuve |
Customer experience
Audio Visualize
K
In-app purchases
Audio Visualize
- Weekly Subscription$1.997 Days
- Monthly Subscription$3.991 Month
- Pro User$9.99
K
No in-app purchases









