# Know the Notes vs Coastline

The clearest difference is price: Know the Notes at $1.99 against Coastline's $14.99. Coastline's advantage is iOS requirement (13.0 vs 15.1). On update cadence, ads, in-app purchases and device support there is nothing between them.

Know the Notes costs $1.99 and Coastline $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Know the Notes ships an update fortnightly, Coastline every 3 weeks. Both last shipped on November 5, 2026.

## The numbers

| Metric | Know the Notes | Coastline |
| --- | --- | --- |
| Price | **$1.99** | $14.99 |
| Rating | — | **[5.0 (12 ratings)](https://appshunter.io/ios/app/coastline-audio-effect/id6780281953/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | — | Paid |
| Size | 26 MB | 71 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DAVID MAYR LERNER](https://appshunter.io/developer/1877367513) | [Aqeel Aadam](https://appshunter.io/developer/1724235864) |

## What reviewers say

### Know the Notes

[App page](https://appshunter.io/ios/app/know-the-notes/id6759197678)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Know the Notes free?

Know the Notes costs $1.99, with no in-app purchases.

### Is Coastline free?

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

### Do Know the Notes or Coastline have ads?

Neither Know the Notes nor Coastline shows ads.

### Which is updated more often, Know the Notes or Coastline?

Know the Notes ships an update fortnightly, and Coastline every 3 weeks. Most recently, Know the Notes was updated on November 5, 2026 and Coastline on November 5, 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.*