Comparison

Gradient Synth vs Doctor Vibe (Legacy)

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Gradient Synth

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
Read full description

** TRANSFORM COLORS INTO SOUNDS ** Designed with beginners in mind, our app makes exploring music fun and intuitive for everyone. Whether you’re just starting out or introducing your child to music, Gradient Synth offers a user-friendly interface and powerful features to help you create and perform unique sounds effortlessly. Now free to download, Gradient Synth invites everyone to explore sound and create at their own pace. ** CREATE YOUR IDEAL SOUND WITH THE NEW PRESET GENERATOR ** Type what you want to hear, and Gradient Synth’s Preset Generator transforms your description into customizable instrument settings. This innovative tool simplifies sound design, allowing you to focus on your creativity without a steep learning curve. Experience the magic of turning your ideas into music with just a few taps. ** EXPLORE YOUR CREATIVITY ** Explore a wide range of sounds, from calm and soothing to bold and experimental. Customize your tones by changing colors, enhancing both your auditory and visual creative processes. Let your imagination flow seamlessly with Gradient Synth, your gateway to endless musical possibilities. ** HERE IS WHAT OUR CUSTOMERS HAVE TO SAY ** "I believe in Gradient Synth!" - TONY G. "I feel like Mozart." - HANNAH R. "I like to change the colors." - SHEPHERD O., Age 5 ** FEATURES ** Preset Generator & Control • Type your desired sound and let the app create unique instrument settings. • Customize and refine presets to match your style. • Over 50 starter presets to inspire your first creations. • Color picker for personalized sound experiences. • Deep customization editor for perfecting your sounds. User-Friendly Interface • Tap or press the gradient to start making music instantly. • Interactive text display provides real-time feedback and learning. • Simple mode ideal for kids and beginners. Advanced Control • Play up to 4 notes simultaneously with polyphony. • Seamlessly integrate with MIDI keyboards and your favorite DAWs. • Connect wirelessly to Bluetooth MIDI devices. Dynamic Effects • Choose from reverb, delay, saturation, bitcrush, chorus, and low pass filter. • Easily adjust effect settings with XY pad and fader controls. • Add movement and depth with the Tone Animator. ** WHY GRADIENT SYNTH? ** • Innovative Preset Generator: Create and customize sounds effortlessly by describing what you want to hear. • Beginner-Friendly: Perfect for those new to music creation, fostering creativity and confidence. • Vibrant Visuals: Enhance your music experience with color-based sound customization. • Comprehensive Features: From basic controls to advanced MIDI compatibility and effects, everything you need to start your musical journey. ** JOIN OUR CREATIVE COMMUNITY ** Share your creations with friends and explore endless creative possibilities together. Download Gradient Synth now and begin your musical journey today! If you love our app, please rate us on the App Store—your feedback helps us grow and improve! ** ADDITIONAL FEATURES ** • Customizable display for a personalized setup. • Favorite preset mode for quick access to your top sounds. • Engaging visualizer for an immersive experience. • Overtone fader and ADSR envelope control for precise sound shaping. • Note Editor to adjust the scale of the gradient. • Drag to re-pitch with an easy toggle option. • Note guide overlay for effortless navigation. • Save and name your custom presets. • Left-hand edit mode for enhanced usability. • MIDI CC Control for expanded functionality. • Synesthesia exploration blending visual and auditory creativity. ** GET STARTED TODAY ** Transform your sound design experience with Gradient Synth. Download now and use our Preset Generator to create and perform music like never before! Previous purchases are honored with Lifetime Ownership. Support: http://manual.gradientsynth.com Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Doctor Vibe (Legacy)

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
Read full description

***This is now a legacy product. It will receive only maintenance updates. If you purchased Doctor Vibe using version 1.5 or earlier, you are eligible for a free upgrade to Doctor Vibe v2. You can claim your upgrade code inside the plug-in's settings menu.*** ***Please note purchases made as of version 1.6 are NOT eligible for a free upgrade to a v2 license.*** Doctor Vibe puts the sound of a classic workflow in your DAW. Includes three DSP modules: - Warm and woozy VINYL simulator - Gritty ADC/DAC for that crunch and sparkle - Muscular MIX SLAMMER modeled after THE legendary lo-fi compressor Details: - Vinyl Simulator - Adjustable signal bandwidth - Warm vinyl noise and crackle - Woozy pitch wobble - Adjustable wow/flutter ratio - Exaggerated needle distortion - AD/DA Converters - Input stage with hardware-inspired soft clipping, output trim - Sparkly aliasing artifacts for sample rates from 3.9 kHz to 44.1 kHz - Selectable bit depth - Selectable anti-aliasing and anti-imaging filters - Mix Slammer - Modeled after THE legendary lo-fi compressor - Input drive, output trim - Compression amount - Wet control for easy parallel compression - Envelope attack, release, and quality - Morph Settings lets you transition the plug-in between two settings. Useful for performance, modulation, automation, and more! Features: - Two-week free trial included, one-time purchase for full unlock - AUv3 effect plug-in runs in a compatible DAW - Standalone links to user manual and video tutorials - Universal purchase on Apple platforms - User presets synced across your devices - Clickless global bypass - Internal undo/redo - A/B settings comparison - High quality mode enables oversampling - Output trim with perceived loudness matching - Global dry/wet - All parameters automatable - Optional auto gain - Mac version includes CLAP and VST3 plug-in formats Check out our YouTube: https://www.youtube.com/@sketchaudio Read the manuals: https://sketchaudio.com/manuals/

Screenshots

Gradient Synth4 screens
Doctor Vibe (Legacy)3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Gradient Synth versus Doctor Vibe (Legacy): the parameters behind the verdict, then further details
ParameterGradient SynthDoctor Vibe (Legacy)
PriceFreeFree
Rating4.4 (63 ratings)4.8 (9 ratings) — better
Positive reviews61.5% of reviews66.7% of reviews — better
Number of ratings63 — better9
Update frequencyMonthly — betterEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS17.015.0 — better
Further details — not scored
Size13 MB7 MB
Age rating4+4+
DeveloperApps Are Fun LLCSketch Audio, LLC

Customer experience

Gradient Synth

All ratings63 ratings
Positive85.7%
Neutral1.6%
Negative12.7%
Written reviews26 reviews
Positive61.5%
Neutral3.8%
Negative34.6%

Doctor Vibe (Legacy)

All ratings9 ratings
Positive88.9%
Neutral11.1%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

In-app purchases

5 purchases

Gradient Synth

Subscriptions2
  • Gradient Synth Supporter (Yearly)1 Year trial$9.991 Year
  • Unlimited Presets$19.991 Year
One-time3
  • 10 Presets$0.99
  • 75 Presets$4.99
  • Lifetime Unlock$12.99
2 purchases

Doctor Vibe (Legacy)

One-time2
  • Two-Week TrialFree
  • Full Unlock$34.99

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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