# Undersong vs Porthole Audio

The clearest difference is update cadence: Undersong at daily against Porthole Audio's every 11 days. Undersong also leads on iOS requirement (17.0 vs 27.0). Porthole Audio's advantage is price ($4.99 vs $9.99). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Undersong costs $9.99 and Porthole Audio $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Undersong against 5.0 for Porthole Audio. Both are backed by a comparable volume of ratings — 11 and 4 respectively.

Undersong ships an update daily, Porthole Audio every 11 days. The most recent releases landed on October 25, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Undersong | Porthole Audio |
| --- | --- | --- |
| Price | $9.99 | **$4.99** |
| Rating | [5.0 (11 ratings)](https://appshunter.io/ios/app/undersong/id6802013758/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/porthole-audio/id6810750563/reviews) |
| Number of ratings | **11** | 4 |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 11 days |
| Monetization | Paid | Paid |
| Size | 19 MB | 7 MB |
| Requires iOS | **17.0** | 27.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ian johnston](https://appshunter.io/developer/1886071653) | [Feras Alnatsheh](https://appshunter.io/developer/1150939919) |

## 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


### Porthole Audio

[App page](https://appshunter.io/ios/app/porthole-audio/id6810750563)

This app captures system audio from your device and routes it into audio plug-ins. It allows you to host AUv3 plug-ins and use the app itself as an instrument within other music applications.

**Highlights:** Capture system audio, Route audio to plug-ins, Host AUv3 plug-ins, Use as an AUv3 instrument, Cross-app audio capture

**In-app purchases:** none


## Frequently asked questions

### Is Undersong free?

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

### Is Porthole Audio free?

Porthole Audio costs $4.99, with no in-app purchases.

### Which has better reviews, Undersong or Porthole Audio?

Undersong and Porthole Audio are both rated 5.0 out of 5 on the App Store, from 11 and 4 ratings respectively.

### Do Undersong or Porthole Audio have ads?

Neither Undersong nor Porthole Audio shows ads.

### Which is updated more often, Undersong or Porthole Audio?

Undersong ships an update daily, and Porthole Audio every 11 days. Most recently, Undersong was updated on October 25, 2026 and Porthole Audio on October 26, 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.*