Comparison

Retro Synth vs Visual Metronome

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

Head to head
About

Retro Synth

Create authentic retro music with this vintage-inspired synthesizer app. Explore sound design with tone controls and vibrato, or upgrade for premium waveforms and studio effects. Designed for instant musical creativity, it offers a portable music-making experience.

Highlights
  • Authentic vintage sound recreation
  • Tone control for sound shaping
  • Vibrato effect for musical expression
  • Zero latency real-time response
  • Premium waveforms (Sine, Sawtooth, Triangle)
  • Studio effects (Reverb, Delay)
  • MIDI export
Features
Read full description

Play a real pocket stylophone — then plug it straight into GarageBand. Retro Synth · Syntophone turns your device into a vintage touch-keyboard synthesizer, and now works as an AUv3 instrument inside GarageBand, Logic Pro, and AUM. Slide your finger across the keys and a warm, authentic square-wave synth comes to life. Learn built-in songs with light-up "follow the key" tutorials, record your ideas, and drop the instrument into your favorite music app — all from one tiny synth. Like the original, it plays one note at a time: one stylus, one note. Curious about Pro? Tap any locked sound and hear it free for 30 seconds. FREE FEATURES (Included at no cost): • Authentic Vintage Sound: faithfully recreates that iconic square-wave tone with modern precision. • Song Mode: learn songs with light-up "follow the key" tutorials, hold-to-repeat for repeated notes, and a star rating when you finish (2 songs free). • My Recordings: a full library to play back, rename, share, and delete your takes. • Metronome: a sample-accurate click with adjustable BPM and an accented downbeat to keep you in time. • AUv3 Instrument: use Syntophone as a plug-in inside GarageBand, Logic Pro, AUM and other AUv3 hosts. • Sound Controls: shape your tone from thin and bright to thick and warm, and add expression with vibrato. • Real-time Response: instant, zero-latency audio as you play. • Clean, minimalist design inspired by vintage hardware. SYNTOPHONE PRO (subscription): Upgrade to unlock the full studio: • Premium Waveforms: Sine, Sawtooth, and Triangle. • Studio Effects: high-quality Reverb and Delay. • Pro Sound Panel: a second detuned oscillator for a fatter analog tone, hands-on delay time & feedback controls, and live MIDI output — play GarageBand and other synth apps as a virtual MIDI keyboard. • 12 more built-in songs to learn. • MIDI Export: save and share your recordings as .mid files. WHY SYNTOPHONE? No setup, no menus to fight — open the app and make music immediately. Then, when you're ready, it becomes a plug-in in your studio. Note: The app includes an auto-renewable subscription (Syntophone Pro) for premium features. For Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Visual Metronome

Features
Read full description

See the beat while you practice. Visual Metronome pairs a clear tempo control with 19 animated rhythm scenes, from a classic pendulum to ripples, rings and a pulse orb. PRACTICE AT YOUR PACE Set a tempo from 30 to 300 BPM using the tempo ruler, plus and minus controls, direct number entry, or tap tempo. Choose 2/4, 3/4, 4/4 or 6/8, with quarter notes, eighths, triplets or sixteenths. MAKE THE BEAT YOURS Choose a click sound, adjust volume, and set individual beats to normal, accented or silent. Build a rhythm in the multi-track pattern editor. Mute the click while keeping the visual beat, or enable a haptic pulse on supported devices. BUILD A PRACTICE ROUTINE Use the tempo trainer to move toward a target BPM and the gap trainer to alternate audible and silent bars. Save tempo, meter, accents and sound as presets for your next session. FOCUS ON THE RHYTHM Open a visualizer fullscreen and keep the display awake during playback. Adjust audio delay compensation for your listening setup. No account is required. Settings and presets are stored on your device.

Screenshots

Retro Synth4 screens
Visual Metronome4 screens

Verdict

The call

The clearest difference is in-app purchases: Visual Metronome at none against Retro Synth's 3. Visual Metronome also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (15.0 vs 17.0). On price, ads and device support 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. Retro Synth sells 3 in-app purchases, starting at $3.99 per month. Visual Metronome asks for nothing beyond the download.

UpkeepUpdate frequency

Retro Synth ships an update every 2 months, Visual Metronome every 2 weeks. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

Scorecard3 real differences · 6 level
Retro Synth versus Visual Metronome: the parameters behind the verdict, then further details
ParameterRetro SynthVisual Metronome
PriceFreeFree
Rating4.2 (5 ratings) — better—
Number of ratings5 — better—
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size14 MB29 MB
Age rating4+4+
DeveloperKerem ERSUMinhyung Kim

In-app purchases

3 purchases

Retro Synth

Subscriptions2
  • Monthly Subscription$3.991 Month
  • Annual Subscription$24.991 Year
One-time1
  • Remove ads$2.99
None

Visual Metronome

No in-app purchases

Questions

Is Retro Synth free?
Retro Synth is free to download, with in-app purchases available.
Is Visual Metronome free?
Visual Metronome is free to download, with no in-app purchases.
Do Retro Synth or Visual Metronome have ads?
Neither Retro Synth nor Visual Metronome shows ads.
Which is updated more often, Retro Synth or Visual Metronome?
Retro Synth ships an update every 2 months, and Visual Metronome every 2 weeks. Most recently, Retro Synth was updated on November 9, 2026 and Visual Metronome on November 10, 2026.

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