# FD vs TfxEcho

The clearest difference is price: TfxEcho at $4.99 against FD's $9.99. TfxEcho also leads on review sentiment (80% vs 67%) and chart position (#185 vs unranked). FD's advantage is iOS requirement (9.0 vs 13.5). On rating, ratings volume, update cadence and ads there is nothing between them.

FD costs $9.99 and TfxEcho $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 — 4.6 for FD against 4.7 for TfxEcho. Both are backed by a comparable volume of ratings — 32 and 12 respectively. Written reviews are what separate them: 67% of FD's written reviews are positive against 80% of TfxEcho's.

FD ships an update every 4 months, TfxEcho every 3 months. The most recent releases landed on September 12, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | FD | TfxEcho |
| --- | --- | --- |
| Price | $9.99 | **$4.99** |
| Rating | [4.6 (32 ratings)](https://appshunter.io/ios/app/fd-1-filter-delay/id1448696965/reviews) | **[4.7 (12 ratings)](https://appshunter.io/ios/app/tfxecho/id1523777426/reviews)** |
| Number of ratings | **32** | 12 |
| Positive reviews | 66.7% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Paid | Paid |
| Best chart rank | — | **#185** |
| Size | 61 MB | 1 MB |
| Requires iOS | **9.0** | 13.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kai Aras](https://appshunter.io/developer/370820899) | [Ryo Togawa](https://appshunter.io/developer/1474193056) |

## What reviewers say

### FD

[App page](https://appshunter.io/ios/app/fd-1-filter-delay/id1448696965)

This app is a semi-modular audio effect plugin featuring dedicated filter, delay, and modulation sections. It allows for the creation of rhythmic filter sequences and a wide range of complex audio effects through its flexible modulation matrix.

**Highlights:** Semi-modular effect plugin, Modulated filter section, Delay stage, Step sequencer, Low Frequency Oscillator, Mod matrix, Tempo sync

**Features:** Vision Pro support

**In-app purchases:** none


### TfxEcho

[App page](https://appshunter.io/ios/app/tfxecho/id1523777426)

**Currently charting:** #185 Top Paid · Music (US App Store)

This audio plugin offers a warm, dark echo effect inspired by analog delay units. It allows for adjustable delay times, feedback, and filters, with modulation capabilities and tempo syncing. The plugin captures high-frequency signals for a versatile sound.

**Highlights:** Echo and delay effect, BBD-inspired delay lines, Adjustable delay time (20-1200 ms), Feedback control (0-100%), Low-pass and high-pass filters, Modulation rate and width, Tempo sync

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is FD free?

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

### Is TfxEcho free?

TfxEcho costs $4.99, with no in-app purchases.

### Which has better reviews, FD or TfxEcho?

TfxEcho is rated higher. FD averages 4.6 out of 5 from 32 ratings, while TfxEcho averages 4.7 from 12 ratings.

### Do FD or TfxEcho have ads?

Neither FD nor TfxEcho shows ads.

### Which is updated more often, FD or TfxEcho?

FD ships an update every 4 months, and TfxEcho every 3 months. Most recently, FD was updated on September 12, 2026 and TfxEcho on September 20, 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.*