# TRF vs E

The clearest difference is in-app purchases: TRF at none against E's 1. TRF also leads on iOS requirement (9.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. E sells 1 one-off in-app purchase. TRF asks for nothing beyond the download.

## The numbers

| Metric | TRF | E |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/e-chorus/id6778245467/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Monetization | — | Free with in-app purchases |
| Size | 19 MB | 26 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [伟 陈](https://appshunter.io/developer/1837176650) | [Shoma Kondo](https://appshunter.io/developer/1884832972) |

## What reviewers say

### TRF

[App page](https://appshunter.io/ios/app/trf-dsp/id6753156985)

**Features:** macOS Compatibility

**In-app purchases:** none


### E

[App page](https://appshunter.io/ios/app/e-chorus/id6778245467)

This app creates a rich, animated stereo soundscape using four modulated delay voices. It can be used as a standalone audio application or as an AUv3 effect within other compatible music production apps.

**Highlights:** Four independently timed ensemble voices, Adjustable rate from 0.1 to 5 Hz, Equal-power dry/wet blending, Width control for stereo imaging, Standalone app and AUv3 effect, Instrument and line input modes

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| E-Chorus Full Version | $4.99 | one-time |


## Frequently asked questions

### Is TRF free?

TRF is free to download, with no in-app purchases.

### Is E free?

E is free to download, with in-app purchases available.

### Do TRF or E have ads?

Neither TRF nor E shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*