# AudioKit Digital D1 Synth vs Arc & Decay

The clearest difference is in-app purchases: Arc & Decay at none against AudioKit Digital D1 Synth's 6. Arc & Decay also leads on ads (none vs shown) and update cadence (daily vs every 3 weeks). AudioKit Digital D1 Synth's advantage is iOS requirement (13.0 vs 17.6). On price and device support there is nothing between them.

Both are free to download. AudioKit Digital D1 Synth sells 6 in-app purchases, starting at $4.99 per 7 days. Arc & Decay asks for nothing beyond the download.

AudioKit Digital D1 Synth ships an update every 3 weeks, Arc & Decay daily. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | AudioKit Digital D1 Synth | Arc & Decay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (2.1K ratings)](https://appshunter.io/ios/app/audiokit-digital-d1-synth/id1436905540/reviews)** | — |
| Number of ratings | **2.1K** | — |
| Positive reviews | 76.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Subscription | — |
| Size | 636 MB | 11 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Audiobus Pty Ltd](https://appshunter.io/developer/672585101) | [Tash Baycroft](https://appshunter.io/developer/6779379023) |

## What reviewers say

### AudioKit Digital D1 Synth

[App page](https://appshunter.io/ios/app/audiokit-digital-d1-synth/id1436905540)

This app is a virtual analog and PCM synthesizer for iPad, inspired by the digital synthesizers of the 80s and 90s. It offers a vast library of presets, advanced synthesis features, and built-in effects for creating rich, retro-inspired sounds.

**Highlights:** 64-voice hybrid digital poly synthesis, 1GB+ of original samples, Stand-alone, IAA, and AUv3 support, Vintage-style arp/step sequencer, 3 LFOs with fun routings, Dual independent per-layer filters, Built-in FX suite

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly premium | $4.99 | per 7 days |
| Weekly premium | $4.99 | per 7 days |
| Yearly premium | $9.99 | per year |
| Yearly premium | $9.99 | per year |
| D1 PCM Expansion-01 | Free | one-time |
| Platinum Expansion PCM EXP-01 | Free | one-time |

**What reviewers like**

- 🎨 Excellent sound quality
- 🎹 Versatile and inspiring presets
- 👍 Intuitive and user-friendly interface
- 💰 Great value for the price
- 🔥 Cutting-edge digital synthesis

**What reviewers complain about**

- 🐛 Occasional crashes and stability issues
- 🔋 High battery consumption
- 🔒 Lack of Audio Unit (AUv3) support
- 🤔 Some presets not easily usable
- 🕰️ Slow loading times in certain DAWs

**Reported bugs**

- Presets not loading correctly
- MIDI note dropouts and latency
- Crashes when used with certain DAWs
- Compatibility issues with newer iOS versions

**Requested features**

- Add Audio Unit (AUv3) support
- Improve MIDI integration and responsiveness
- Implement a built-in recording/sampling feature
- Expand preset library with more genres and styles
- Add more sound design controls and modulation options


### Arc & Decay

[App page](https://appshunter.io/ios/app/arc-and-decay/id6779379021)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AudioKit Digital D1 Synth free?

AudioKit Digital D1 Synth is free to download, with in-app purchases available.

### Is Arc & Decay free?

Arc & Decay is free to download, with no in-app purchases.

### Do AudioKit Digital D1 Synth or Arc & Decay have ads?

AudioKit Digital D1 Synth shows ads; Arc & Decay does not.

### Which is updated more often, AudioKit Digital D1 Synth or Arc & Decay?

AudioKit Digital D1 Synth ships an update every 3 weeks, and Arc & Decay daily. Most recently, AudioKit Digital D1 Synth was updated on October 21, 2026 and Arc & Decay on October 18, 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.*