# Coastline vs FIELD KIT Playback Engine

The clearest difference is rating: Coastline at 5.0 against FIELD KIT Playback Engine's 4.6. Coastline also leads on review sentiment (100% vs 80%) and iOS requirement (13.0 vs 15.0). FIELD KIT Playback Engine's advantage is price ($9.99 vs $14.99) and chart position (#180 vs unranked). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Coastline costs $14.99 and FIELD KIT Playback Engine $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Coastline holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 12 and 5 respectively. Written reviews point the same way: 100% of Coastline's written reviews are positive against 80% of FIELD KIT Playback Engine's.

Coastline ships an update every 3 weeks, FIELD KIT Playback Engine every 2 weeks. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Coastline | FIELD KIT Playback Engine |
| --- | --- | --- |
| Price | $14.99 | **$9.99** |
| Rating | **[5.0 (12 ratings)](https://appshunter.io/ios/app/coastline-audio-effect/id6780281953/reviews)** | [4.6 (5 ratings)](https://appshunter.io/ios/app/field-kit-playback-engine/id6810484807/reviews) |
| Number of ratings | **12** | 5 |
| Positive reviews | **100.0% of reviews** | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Paid | Paid |
| Best chart rank | — | **#180** |
| Size | 71 MB | 12 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aqeel Aadam](https://appshunter.io/developer/1724235864) | [Field Tone Audio, LLC](https://appshunter.io/developer/1891479237) |

## What reviewers say

### Coastline

[App page](https://appshunter.io/ios/app/coastline-audio-effect/id6780281953)

This app generates unique audio atmospheres and textures for music production. It uses additive and granular synthesis to add depth and character to tracks, offering extensive modulation and a dual-engine sustainer.

**Highlights:** Dual-engine audio sustainer, Additive and granular synthesis, Custom sample support, Intermodulation and advanced filtering, Extensive modulation options, Cross-platform preset sharing

**Features:** Vision Pro support

**In-app purchases:** none


### FIELD KIT Playback Engine

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

**Currently charting:** #180 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


## Frequently asked questions

### Is Coastline free?

Coastline costs $14.99, with no in-app purchases.

### Is FIELD KIT Playback Engine free?

FIELD KIT Playback Engine costs $9.99, with no in-app purchases.

### Which has better reviews, Coastline or FIELD KIT Playback Engine?

Coastline is rated higher. Coastline averages 5.0 out of 5 from 12 ratings, while FIELD KIT Playback Engine averages 4.6 from 5 ratings.

### Do Coastline or FIELD KIT Playback Engine have ads?

Neither Coastline nor FIELD KIT Playback Engine shows ads.

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

Coastline ships an update every 3 weeks, and FIELD KIT Playback Engine every 2 weeks. Most recently, Coastline was updated on October 24, 2026 and FIELD KIT Playback Engine 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.*