# AudioKit Digital D1 Synth vs Simple Sets

The clearest difference is ads: Simple Sets at none against AudioKit Digital D1 Synth's shown. AudioKit Digital D1 Synth's advantage is iOS requirement (13.0 vs 16.0). On price, update cadence, in-app purchases 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 and Simple Sets sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

AudioKit Digital D1 Synth ships an update every 3 weeks, Simple Sets every 11 days. The most recent releases landed on October 13, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | AudioKit Digital D1 Synth | Simple Sets |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (2K ratings)](https://appshunter.io/ios/app/audiokit-digital-d1-synth/id1436905540/reviews)** | — |
| Number of ratings | **2K** | — |
| Positive reviews | 76.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 11 days** |
| Monetization | Subscription | — |
| Size | 636 MB | 48 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [Audiobus Pty Ltd](https://appshunter.io/developer/672585101) | [Kyle Palmer](https://appshunter.io/developer/1896532476) |

## 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


### Simple Sets

[App page](https://appshunter.io/ios/app/simple-sets/id6768031963)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Simple Sets Premium | $6.99 | one-time |


## Frequently asked questions

### Is AudioKit Digital D1 Synth free?

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

### Is Simple Sets free?

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

### Do AudioKit Digital D1 Synth or Simple Sets have ads?

AudioKit Digital D1 Synth shows ads; Simple Sets does not.

### Which is updated more often, AudioKit Digital D1 Synth or Simple Sets?

AudioKit Digital D1 Synth ships an update every 3 weeks, and Simple Sets every 11 days. Most recently, AudioKit Digital D1 Synth was updated on October 13, 2026 and Simple Sets on September 29, 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.*