# Autony vs FD

The clearest difference is update cadence: Autony at every 5 days against FD's every 4 months. Autony also leads on price ($3.99 vs $9.99). FD's advantage is iOS requirement (9.0 vs 15.6). On rating, review sentiment, ratings volume and ads there is nothing between them.

Autony costs $3.99 and FD $9.99 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 — 4.5 for Autony against 4.6 for FD. Both are backed by a comparable volume of ratings — 40 and 32 respectively. Written reviews are what separate them: 61% of Autony's written reviews are positive against 67% of FD's.

Autony ships an update every 5 days, FD every 4 months. The most recent releases landed on September 17, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Autony | FD |
| --- | --- | --- |
| Price | **$3.99** | $9.99 |
| Rating | [4.5 (40 ratings)](https://appshunter.io/ios/app/autony/id1440149545/reviews) | **[4.6 (32 ratings)](https://appshunter.io/ios/app/fd-1-filter-delay/id1448696965/reviews)** |
| Number of ratings | **40** | 32 |
| Positive reviews | 60.9% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 4 months |
| Monetization | Paid | Paid |
| Size | 1 MB | 61 MB |
| Requires iOS | 15.6 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pagefall limited](https://appshunter.io/developer/1440149544) | [Kai Aras](https://appshunter.io/developer/370820899) |

## What reviewers say

### Autony

[App page](https://appshunter.io/ios/app/autony/id1440149545)

This app generates evolving musical sequences using a MIDI signal. It can be constrained to scales and chords, transposed, and mutated for dynamic musical output. All controls are MIDI-automatable and it requires a host app to function.

**Highlights:** Generates evolving musical sequences, MIDI output for synths and hardware, Constrain sequences to scales and chords, On-the-fly transposition, Sequence mutation for dynamic evolution, MIDI automation of all controls

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Autony free?

Autony costs $3.99, with no in-app purchases.

### Is FD free?

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

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

FD is rated higher. Autony averages 4.5 out of 5 from 40 ratings, while FD averages 4.6 from 32 ratings.

### Do Autony or FD have ads?

Neither Autony nor FD shows ads.

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

Autony ships an update every 5 days, and FD every 4 months. Most recently, Autony was updated on September 17, 2026 and FD on September 12, 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.*