# Polynizer: see what you hear — Notes and chords for any song

> Music analysis app for notes, chords, and song structure. (iPhone/iPad app by Polynizer SRL.)

- Source: https://appshunter.io/ios/app/polynizer-see-what-you-hear/id1583973548 (this page in markdown: same URL + `.md`)
- Developer: [Polynizer SRL](https://appshunter.io/developer/1583973550)
- Category: Music, Music, Education
- Price: Free with in-app purchases
- Age rating: 17+
- Requires: iOS 16.0 · 42 MB
- Languages: English
- Released: 2024-01-09
- Data updated: 2026-06-11
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/polynizer-see-what-you-hear/id1583973548/reviews.md

## What is Polynizer?

WHAT CAN YOU DO WITH POLYNIZER

- View a piano roll for any song—whether it's on YouTube, stored locally on your device, or played live through your mic.
- See precise chord names, guitar chord charts, staff notation, keyboard voicings, and more—customized to your level: basic, intermediate, or advanced.
- Customize chord naming: English or Italian note names, jazz symbols, Roman numeral analysis, and more.
- Define bars, time signatures, and key signatures to match the song structure.
- Detect and adjust the song’s tuning.
- Transpose the song to any key—including audio transposition for local files.*
- Change playback speed to suit your learning pace.
- Export chords and lyrics as a PDF for practice or sharing.

*Audio transposition is available only for local audio files, not YouTube videos.

HOW TO USE MICROPHONE MODE

1. Select Microphone from the menu and start playing. Polynizer will listen in real time and transcribe the notes into a piano roll. The volume adjusts automatically to your playing level.
2. Press the Record button if you want to save the audio for later use.

HOW TO USE YOUTUBE VIDEOS OR LOCAL FILES

1. Choose the song you want to analyze—either a YouTube video or a local audio file. In just a few seconds, Polynizer will display a piano roll with the detected notes.
2. Tap the Play button to listen along.
3. To add a chord, press and hold the Hold for Chord button for the full duration of the chord. Polynizer will suggest up to three chord options.

Once you have introduced some chords, you can explore other Polynizer’s great features: set key and time signatures, define bars, adjust speed, and more. With flexible subscription plans, there’s an option for every need.

Play the music you love with Polynizer!

Privacy policy: https://polynizer.com/privacypolicy
Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

## Key features

- Piano roll for any song
- Real-time microphone analysis
- Chord names and charts
- Staff notation and keyboard voicings
- Customizable chord naming
- Transpose songs to any key
- Export chords and lyrics as PDF

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro | $6.99 | per month |
| Gold | $9.99 | per month |
| Basic | $3.99 | per month |


## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/polynizer-see-what-you-hear/id1583973548/reviews.md

### 4/5 — Useful with Problems

*2025-12-26, version 2.3*

I could use this to visualize many YouTube songs for free. However, the app doesn’t provide a very clear visualization for audios without high definition sound. I do like the free 30 songs I get monthly to polynize, and the crazy cheap subscription at only a couple dollars, but overall I would recommend this.

### 1/5 — Oops

*2025-10-08, version 2.3*

Error in processing YouTube says ... "Oops, new song ... " Having played with this app for 5 mins ... it seems like all the features are paywalled (no free trial) or simply broken.

### 1/5 — Has potential

*2024-03-31, version 2.0.1*

I can see this being useful, but it needs some work. I loaded an mp3 file of an organ part I am trying to learn. It is just the organ, no other instruments to filter. I’m on an iPad Air 4. The piano roll is so light and small I can hardly see it. That needs to be brightened up a good bit to make it visible. I like that you can slow it down, but it is just too hard to see. Hopefully the developer can fix this or offer a way to adjust the view. It would change my rating considerably. It is also possible that the app is confused by the Wurlitzer effect on organ parts.

## Frequently asked questions about Polynizer

### What can Polynizer do with a song?

Polynizer can display a piano roll, precise chord names, guitar chord charts, staff notation, and keyboard voicings for any song. It can also detect and adjust the song's tuning and transpose it to any key.

### How does Polynizer analyze songs?

You can analyze songs from YouTube videos, local audio files on your device, or by playing live through your microphone. The app listens in real-time and transcribes notes into a piano roll.

### Can I customize how chords are named in Polynizer?

Yes, you can customize chord naming to use English or Italian note names, jazz symbols, or Roman numeral analysis, catering to your preferred level of detail.

### What are the subscription plans for Polynizer?

Polynizer offers flexible subscription plans including Basic at $3.99/month, Pro at $6.99/month, and Gold at $9.99/month.

### Can Polynizer help me practice music?

Yes, you can change the playback speed to suit your learning pace and export chords and lyrics as a PDF for convenient practice or sharing.

### Does Polynizer have ads?

No, Polynizer does not contain advertisements. The app is free to download and use with optional in-app purchases for advanced features and subscription plans.

### What devices does Polynizer support?

Polynizer is supported on iPhone and iPad devices, making it accessible for users on the Apple ecosystem.

### How often is Polynizer updated?

Polynizer was last updated on July 31, 2025, indicating regular maintenance and potential feature additions.

## Version history (last 5 releases)

### 2.3 — 2025-07-31

These are the latest and most exciting features:

- Live Piano Roll from Microphone: Get real-time transcriptions of music captured through your device’s mic. You can also record the audio by tapping the Record button.
- Cloud or On-Device Processing: Choose between cloud-based analysis or faster, on-device processing (ideal for short songs and high-performance devices).

### 2.2.1 — 2025-06-30

This update improves stability and prepares the app for upcoming features.

### 2.2 — 2025-05-23

Revamped Roman numeral analysis:
• Minor and diminished chords now use lowercase (e.g., i, iio)
• Inversions now follow standard interval notation (e.g., 6, 4/3)
• Secondary dominants and diminished chords appear with slash notation (e.g., V7/vi, viio/vi)

Current bar number:
• Now current bar is numbered (previous versions only showed numbers for upcoming bars).

### 2.1.7 — 2025-05-15

Solved an issue that prevented users from searching for videos.

### 2.1.6 — 2025-04-14

The new version of Polynizer now supports the major 'add11' chord type—a frequently requested addition. Some minor improvements were also applied.

## Apps similar to Polynizer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Kebarp AUv3 MIDI Arpeggiator](https://appshunter.io/ios/app/kebarp-auv3-midi-arpeggiator/id6479562640) | 4.7 (11) | $5.99 | Music |
| [HoRNet HarmoniQ](https://appshunter.io/ios/app/hornet-harmoniq/id6503445750) | 5.0 (5) | Free | Music |
| [Skratch It](https://appshunter.io/ios/app/skratch-it/id6474067478) | 4.8 (24) | $3.99 | Music |
| [NovoNotes Duo](https://appshunter.io/ios/app/novonotes-duo/id6475055040) | 4.8 (8) | Free | Music |
| [TAIP - Baby Audio](https://appshunter.io/ios/app/taip-baby-audio/id6446287957) | 5.0 (6) | $19.99 | Music |
| [Meow \| Audio Editor](https://appshunter.io/ios/app/meow-audio-editor/id6477335742) | 4.5 (8) | Free | Music |

## Related topics

[arturo camacho lozano](https://appshunter.io/ios/topics/arturo-camacho-lozano)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*