Comparison

Vetro vs Harmonaut

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

Head to head
About

Vetro

This app provides a visual metronome with dynamic beat synchronization via Ableton Link. It supports custom animations and works across multiple devices, enhancing practice and recording sessions.

Highlights
  • Visual metronome
  • Ableton Link synchronization
  • Custom GIF and Lottie animations
  • Multiple visualization modes
  • Cross-device support (iPhone, iPad, macOS)
  • Adjustable time signatures
Read full description

Vetro is a visual metronome that can synchronize automatically to a shared tempo on the network using Ableton Link protocol. Different visualization modes are included. Customize it by importing any animated GIF or Lottie animation (just drag and drop) and it will play in sync to your music. Use it in any of your devices (iPhone, iPad and macOS supported). On macOS, it can be freely resized to any window size and kept visible at all times so you are always aware of the current tempo. Blend it with your favorite apps by adjusting window opacity, and even allow mouse events to pass through so you can keep it visible while controlling the apps underneath. Use it as a visual enhancement for your recording sessions or as a new kind of metronome when practicing. Many devices can be used at the same time and they will all sync together. This may be cool when jamming! ## Features * 11 visual modes included. * 7 metronome sounds included. * Accurate timing. * Ableton Link synchronization. * Set any time signature. * Play animated GIF and Lottie animations in sync. * iPhone, iPad and macOS support. ## macOS-only features * Always visible option. * Translucent window: Adjust background and content opacity independently. * Pass-through mouse events. Keep Vetro on top of other apps without interrupting your workflow. * Automatically show/hide Vetro window when receiving Link Start/Stop commands.

About

Harmonaut

Create music by feel without needing music theory. This app generates rich chords and smooth progressions, allowing you to shape the mood with intuitive controls. Save and reorder your musical ideas effortlessly.

Highlights
  • Play by feel, no theory required
  • Shape mood with tension and brightness faders
  • Smooth voice leading for flowing progressions
  • Chords named for musicians
  • Save and reorder progressions
  • Works on iPhone and iPad
Features
Read full description

Harmonaut™ is a chord instrument you play by feel. Press a key and hear a rich chord, voice-led smoothly from the last one, no theory needed. Build a progression, shape its mood, and export it as MIDI for your track. Two faders let you shape the mood as you play: more tension or less, brighter or darker, even major to minor. Chase a moody electronic progression, a warm lo-fi loop, a jazzy turn, a cinematic swell, or a simple pop hook. It all comes from your intent, not from naming chords. HOW IT PLAYS • Tension that actually resolves: chords that lean, pull home, and land, so your progression goes somewhere instead of just floating • Every one of the twelve keys is in play: reach past the obvious chords for richer, more surprising color, and it still sounds right • Build a whole progression, not just four chords: every chord you play lands in your trail, ready to reorder or duplicate to try new versions in seconds • Pick up right where you left off: your ideas are saved for you TAKE IT TO YOUR TRACK • Export any progression as a MIDI file and drop it into BandLab, GarageBand, or any DAW that opens MIDI, then play it through any instrument you like • Export to iReal Pro format to keep a chord chart or practice over the changes • Harmonaut Pro unlocks MIDI export, iReal Pro export, and unlimited saved progressions IT SOUNDS GOOD FOR A REASON Every chord is voice-led from the one before it, live, as you play: the notes move the shortest way, so a progression flows instead of jumping around. That's the finished feeling you hear in the songs you love. Push Intensity and the voicings open up: lush 9ths, bright 13ths, and altered dominants like G7#9b13, the colors session keyboard players reach for. And Harmonaut names every chord the way musicians actually write it, like Ebmaj7, so you can hand your progression to a session player, a bandmate, or a producer and they'll play it back exactly, first time. No box to buy, nothing to charge, no menus to dig through. It's already in your pocket. Whether it's your first progression or a sound you can hear but can't name, Harmonaut meets you where you are. See the end user license agreement at the following link: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Vetro4 screens
Harmonaut4 screens

Verdict

The call

The clearest difference is review sentiment: Harmonaut at 100% against Vetro's 40%. Harmonaut also leads on rating (5.0 vs 4.0) and update cadence (every 9 days vs every 2 months). Vetro's advantage is in-app purchases (none vs 1). On price, ads, device support and iOS requirement 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. Harmonaut sells 1 one-off in-app purchase. Vetro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Harmonaut holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 7 respectively. Written reviews point the same way: 40% of Vetro's written reviews are positive against 100% of Harmonaut's.

UpkeepUpdate frequency

Vetro ships an update every 2 months, Harmonaut every 9 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

Scorecard6 real differences · 4 level
Vetro versus Harmonaut: the parameters behind the verdict, then further details
ParameterVetroHarmonaut
PriceFreeFree
Rating4.0 (2 ratings)5.0 (7 ratings) — better
Positive reviews40.0% of reviews100.0% of reviews — better
Number of ratings27 — better
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS17.617.0 — better
Further details — not scored
Size6 MB117 MB
Age rating4+4+
DeveloperJoan DuatDistrict One Mobile, LLC

Customer experience

Vetro

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews5 reviews
Positive40.0%
Neutral20.0%
Negative40.0%

Harmonaut

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Vetro

No in-app purchases

1 purchases

Harmonaut

One-time1
  • Harmonaut Pro$9.99

Questions

Is Vetro free?
Vetro is free to download, with no in-app purchases.
Is Harmonaut free?
Harmonaut is free to download, with in-app purchases available.
Which has better reviews, Vetro or Harmonaut?
Harmonaut is rated higher. Vetro averages 4.0 out of 5 from 2 ratings, while Harmonaut averages 5.0 from 7 ratings.
Do Vetro or Harmonaut have ads?
Neither Vetro nor Harmonaut shows ads.
Which is updated more often, Vetro or Harmonaut?
Vetro ships an update every 2 months, and Harmonaut every 9 days. Most recently, Vetro was updated on October 30, 2026 and Harmonaut on October 25, 2026.

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