# AudioKit Digital D1 Synth vs Human Scale

The clearest difference is monetization model: Human Scale at free against AudioKit Digital D1 Synth's subscription. Human Scale also leads on ads (none vs shown) and review sentiment (100% vs 76%). AudioKit Digital D1 Synth's advantage is update cadence (every 3 weeks vs every 7 months) and ratings volume (2.1K vs 3). On price, in-app purchases and iOS requirement 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 Human Scale sells 11 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Human Scale holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: AudioKit Digital D1 Synth has 2.1K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 76% of AudioKit Digital D1 Synth's written reviews are positive against 100% of Human Scale's.

AudioKit Digital D1 Synth ships an update every 3 weeks, Human Scale every 7 months. The most recent releases landed on October 21, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | AudioKit Digital D1 Synth | Human Scale |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (2.1K ratings)](https://appshunter.io/ios/app/audiokit-digital-d1-synth/id1436905540/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/human-scale/id1481427956/reviews)** |
| Number of ratings | **2.1K** | 3 |
| Positive reviews | 76.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 7 months |
| Monetization | Subscription | **Free** |
| Size | 636 MB | 40 MB |
| Requires iOS | **13.0** | 14.1 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Audiobus Pty Ltd](https://appshunter.io/developer/672585101) | [David Diaz](https://appshunter.io/developer/1387340081) |

## 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


### Human Scale

[App page](https://appshunter.io/ios/app/human-scale/id1481427956)

This app is the primary distribution channel for algorithmic audio compositions. It allows users to access and enjoy unique soundscapes created through algorithms. Experience a new form of auditory art.

**Highlights:** Algorithmic media distribution, Audio composition playback, Unique soundscape experience, Primary distribution channel

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| jobs of the great misery | Free | one-time |
| prom date | Free | one-time |
| nonaligned movement | Free | one-time |
| gymnopédie no. 1 | Free | one-time |
| infinite sea | Free | one-time |
| marginal eternity | Free | one-time |
| 85% true/minor ecologies | Free | one-time |
| day of reflection | Free | one-time |
| coulée continue | Free | one-time |
| the bad harvest | Free | one-time |
| old straight track | Free | 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 Human Scale free?

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

### Which has better reviews, AudioKit Digital D1 Synth or Human Scale?

Human Scale is rated higher. AudioKit Digital D1 Synth averages 4.8 out of 5 from 2.1K ratings, while Human Scale averages 5.0 from 3 ratings.

### Do AudioKit Digital D1 Synth or Human Scale have ads?

AudioKit Digital D1 Synth shows ads; Human Scale does not.

### Which is updated more often, AudioKit Digital D1 Synth or Human Scale?

AudioKit Digital D1 Synth ships an update every 3 weeks, and Human Scale every 7 months. Most recently, AudioKit Digital D1 Synth was updated on October 21, 2026 and Human Scale on October 6, 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.*