# Gradient Synth vs Doctor Vibe (Legacy)

The clearest difference is rating: Doctor Vibe (Legacy) at 4.8 against Gradient Synth's 4.4. Doctor Vibe (Legacy) also leads on device support (4 vs 2) and iOS requirement (15.0 vs 17.0). Gradient Synth's advantage is update cadence (monthly vs every 3 months) and ratings volume (63 vs 9). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Gradient Synth sells 5 in-app purchases, starting at $9.99 per year and Doctor Vibe (Legacy) sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Doctor Vibe (Legacy) holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Gradient Synth has 63 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 62% of Gradient Synth's written reviews are positive against 67% of Doctor Vibe (Legacy)'s.

Gradient Synth ships an update monthly, Doctor Vibe (Legacy) every 3 months. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Gradient Synth | Doctor Vibe (Legacy) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (63 ratings)](https://appshunter.io/ios/app/gradient-synth/id6477543878/reviews) | **[4.8 (9 ratings)](https://appshunter.io/ios/app/doctor-vibe-legacy/id6479925332/reviews)** |
| Number of ratings | **63** | 9 |
| Positive reviews | 61.5% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 13 MB | 7 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Apps Are Fun LLC](https://appshunter.io/developer/1659934806) | [Sketch Audio, LLC](https://appshunter.io/developer/1699093348) |

## What reviewers say

### Gradient Synth

[App page](https://appshunter.io/ios/app/gradient-synth/id6477543878)

Transform colors into unique sounds with this intuitive music creation app. Designed for beginners and children, it offers a user-friendly interface and powerful features to explore and customize a wide range of audio experiences.

**Highlights:** Preset Generator, Color-based sound customization, User-friendly interface, MIDI keyboard integration, Dynamic audio effects, Polyphony

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gradient Synth Supporter (Yearly) | $9.99 | per year |
| Unlimited Presets | $19.99 | per year |
| 10 Presets | $0.99 | one-time |
| 75 Presets | $4.99 | one-time |
| Lifetime Unlock | $12.99 | one-time |


### Doctor Vibe (Legacy)

[App page](https://appshunter.io/ios/app/doctor-vibe-legacy/id6479925332)

This app simulates the sound of classic sampling hardware with three DSP modules: a vinyl simulator, gritty AD/DA converters, and a powerful compressor. It offers extensive control over audio degradation and creative morphing for unique sound design.

**Highlights:** Vinyl simulator with noise and wobble, Gritty AD/DA converter emulation, Legendary lo-fi compressor model, Morph settings for performance, AUv3 effect plugin, User presets synced across devices

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Two-Week Trial | Free | one-time |
| Full Unlock | $34.99 | one-time |


## Frequently asked questions

### Is Gradient Synth free?

Gradient Synth is free to download, with in-app purchases available.

### Is Doctor Vibe (Legacy) free?

Doctor Vibe (Legacy) is free to download, with in-app purchases available.

### Which has better reviews, Gradient Synth or Doctor Vibe (Legacy)?

Doctor Vibe (Legacy) is rated higher. Gradient Synth averages 4.4 out of 5 from 63 ratings, while Doctor Vibe (Legacy) averages 4.8 from 9 ratings.

### Do Gradient Synth or Doctor Vibe (Legacy) have ads?

Neither Gradient Synth nor Doctor Vibe (Legacy) shows ads.

### Which is updated more often, Gradient Synth or Doctor Vibe (Legacy)?

Gradient Synth ships an update monthly, and Doctor Vibe (Legacy) every 3 months. Most recently, Gradient Synth was updated on November 4, 2026 and Doctor Vibe (Legacy) on October 30, 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.*