# Hisooth Resonance™ vs Undersong

The clearest difference is price: Hisooth Resonance™ at Free against Undersong's $9.99. Hisooth Resonance™ also leads on iOS requirement (13.0 vs 17.0). Undersong's advantage is rating (5.0 vs 1.0) and update cadence (daily vs every 4 days). On ads, in-app purchases and device support there is nothing between them.

Hisooth Resonance™ is free to download; Undersong costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Undersong holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: Undersong has 14 ratings behind it against 1, so its average is the more settled of the two.

Hisooth Resonance™ ships an update every 4 days, Undersong daily. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Hisooth Resonance™ | Undersong |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/hisooth-resonance/id6757639719/reviews) | **[5.0 (14 ratings)](https://appshunter.io/ios/app/undersong/id6802013758/reviews)** |
| Number of ratings | 1 | **14** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 days | **Daily** |
| Monetization | **Free** | Paid |
| Size | 27 MB | 19 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [江苏名腾医疗器械有限公司](https://appshunter.io/developer/1646005951) | [ian johnston](https://appshunter.io/developer/1886071653) |

## What reviewers say

### Hisooth Resonance™

[App page](https://appshunter.io/ios/app/hisooth-resonance/id6757639719)

This app offers a premium music streaming experience focused on vibroacoustic wellness. It provides professional soundscapes for meditation, sleep, recovery, and relaxation, designed for use with specialized wellness equipment.

**Highlights:** Licensed music library, Therapeutic soundscapes, Meditation and sleep music, Exclusive artist content, Album code activation, High-quality audio streaming

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Hisooth Resonance™ free?

Hisooth Resonance™ is free to download, with no in-app purchases.

### Is Undersong free?

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

### Which has better reviews, Hisooth Resonance™ or Undersong?

Undersong is rated higher. Hisooth Resonance™ averages 1.0 out of 5 from 1 ratings, while Undersong averages 5.0 from 14 ratings.

### Do Hisooth Resonance™ or Undersong have ads?

Neither Hisooth Resonance™ nor Undersong shows ads.

### Which is updated more often, Hisooth Resonance™ or Undersong?

Hisooth Resonance™ ships an update every 4 days, and Undersong daily. Most recently, Hisooth Resonance™ was updated on November 9, 2026 and Undersong on November 10, 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.*