# Undersong vs NotePulse

The clearest difference is price: NotePulse at $0.99 against Undersong's $9.99. Undersong's advantage is update cadence (daily vs every 10 days). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Undersong costs $9.99 and NotePulse $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Undersong ships an update daily, NotePulse every 10 days. The most recent releases landed on October 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Undersong | NotePulse |
| --- | --- | --- |
| Price | $9.99 | **$0.99** |
| Rating | **[5.0 (11 ratings)](https://appshunter.io/ios/app/undersong/id6802013758/reviews)** | — |
| Number of ratings | **11** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 10 days |
| Monetization | Paid | — |
| Size | 19 MB | 5 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ian johnston](https://appshunter.io/developer/1886071653) | [Noorcon Inc.](https://appshunter.io/developer/656997884) |

## What reviewers say

### Undersong

[App page](https://appshunter.io/ios/app/undersong/id6802013758)

This audio effect acts like an instrument, generating synthesized notes in key based on incoming audio. Explore a vast array of sound combinations with various materials, modes, and patterns for unique ambient performances.

**Highlights:** Generates in-key synthesized notes from audio input, 12 material types and 10 performance modes, 10 pattern options for sound shaping, Self-generating ambient pad mode, Gravity feature for melodic anchoring, Customizable scales and root notes, Integrated reverb effect

**In-app purchases:** none


### NotePulse

[App page](https://appshunter.io/ios/app/notepulse-midi-visualizer/id6810961670)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Undersong free?

Undersong costs $9.99, with no in-app purchases.

### Is NotePulse free?

NotePulse costs $0.99, with no in-app purchases.

### Do Undersong or NotePulse have ads?

Neither Undersong nor NotePulse shows ads.

### Which is updated more often, Undersong or NotePulse?

Undersong ships an update daily, and NotePulse every 10 days. Most recently, Undersong was updated on October 25, 2026 and NotePulse on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*