# FIELD KIT Playback Engine vs Porthole Audio

The clearest difference is review sentiment: FIELD KIT Playback Engine at 80% against Porthole Audio's 50%. FIELD KIT Playback Engine also leads on iOS requirement (15.0 vs 27.0). Porthole Audio's advantage is rating (5.0 vs 4.6) and price ($4.99 vs $9.99). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

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

Porthole Audio holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 5 and 4 respectively. Written reviews complicate that: 80% of FIELD KIT Playback Engine's written reviews are positive against 50% of Porthole Audio's, so the app with the better star average is not the one people write more warmly about.

FIELD KIT Playback Engine ships an update every 2 weeks, Porthole Audio every 11 days. Both last shipped on November 6, 2026.

## The numbers

| Metric | FIELD KIT Playback Engine | Porthole Audio |
| --- | --- | --- |
| Price | $9.99 | **$4.99** |
| Rating | [4.6 (5 ratings)](https://appshunter.io/ios/app/field-kit-playback-engine/id6810484807/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/porthole-audio/id6810750563/reviews)** |
| Number of ratings | **5** | 4 |
| Positive reviews | **80.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 11 days** |
| Monetization | Paid | Paid |
| Best chart rank | #167 | **#139** |
| Size | 12 MB | 7 MB |
| Requires iOS | **15.0** | 27.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Field Tone Audio, LLC](https://appshunter.io/developer/1891479237) | [Feras Alnatsheh](https://appshunter.io/developer/1150939919) |

## What reviewers say

### FIELD KIT Playback Engine

[App page](https://appshunter.io/ios/app/field-kit-playback-engine/id6810484807)

**Currently charting:** #167 Top Paid · Music (US App Store)

Transform audio recordings into evolving textures, rhythms, and atmospheres. Create up to four independent playback windows with customizable speed, direction, and effects. Explore new sonic material from your recordings.

**Highlights:** Up to four independent playback windows, Variable playback speed and direction, Drive and filtering per window, Routable modulation sources, Save and recall .fieldkit files, Standalone app and AUv3 Audio Unit

**In-app purchases:** none


### Porthole Audio

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

**Currently charting:** #139 Top Paid · Music (US App Store)

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 FIELD KIT Playback Engine free?

FIELD KIT Playback Engine 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, FIELD KIT Playback Engine or Porthole Audio?

Porthole Audio is rated higher. FIELD KIT Playback Engine averages 4.6 out of 5 from 5 ratings, while Porthole Audio averages 5.0 from 4 ratings.

### Do FIELD KIT Playback Engine or Porthole Audio have ads?

Neither FIELD KIT Playback Engine nor Porthole Audio shows ads.

### Which is updated more often, FIELD KIT Playback Engine or Porthole Audio?

FIELD KIT Playback Engine ships an update every 2 weeks, and Porthole Audio every 11 days. Most recently, FIELD KIT Playback Engine was updated on November 6, 2026 and Porthole Audio on November 6, 2026.

### Which is more popular, FIELD KIT Playback Engine or Porthole Audio?

FIELD KIT Playback Engine currently peaks at #167 in the App Store charts, and Porthole Audio at #139. Chart position reflects recent download velocity rather than total install base.

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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.*