Comparison

Metronom 137 vs HarmonicAlly

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

Head to head
About

Metronom 137

Features
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Metronom 137 keeps you in time - all along your setlists. Worn on your wrist, it vibrates on every beat so you can feel the tempo during practice, on stage, or in the rehearsal room. Adjust the BPM with a single swipe, tap in the center for tap tempo, or change the time signature with a flick. NEW: TEMPO CHECK Not sure if you're actually playing on tempo? Tempo Check listens to what you're playing and compares it in real time to your target BPM, with a live graph showing how close you are. A short session is free to try; unlock unlimited Tempo Check sessions with a one-time purchase. APPLE WATCH • Metronome from 20 to 320 BPM • Swipe to adjust tempo instantly, or use the Digital Crown for fine control • Tap tempo - tap in the center of the screen • Time signatures: 4/4, 3/4, 6/8, and more • 4 feedback modes: vibration + sound (iPhone only), sound only, vibration only, or silent (discrete) • Save songs to your setlist with their BPM and time signature • Skip to the previous or next song with one tap • See and control Tempo Check right from your wrist, including starting or stopping a session remotely iPHONE COMPANION APP • Full metronome with the same features as the Apple Watch app, plus a redesigned, easier-to-read track list and setlist browser • Multiple named local setlists, reorderable with a simple drag • Multiple setlists from The Live Setlists (see below) • Tempo, time signature, setlist selection, and Tempo Check all stay perfectly in sync between iPhone and Apple Watch in real time - whichever device you touch, the other follows THE LIVE SETLISTS INTEGRATION (optional) Metronom 137 partners with The Live Setlists - a platform where you build and share setlists with your bandmates. Any setlist you create there is available directly in the app. Load a setlist in one tap, and when you adjust the tempo or time signature during rehearsal, the change can be saved back so your whole band always sees the latest values. No account required to use the app, but account needed to access The Live Setlists setlists. Your music, your tempo, on your wrist.

About

HarmonicAlly

This app provides a comprehensive suite of tools for harmonica players, including chord and scale lookups, instrument key identification, and harmonica collection tracking. It also offers practical advice on playing and instrument care.

Highlights
  • Chord and scale lookup
  • Instrument key identification
  • Harmonica collection tracker
  • Customizable tuning options
  • Playing and care tips
  • Offline functionality
Features
Read full description

Play More. Guess Less. HarmonicAlly™ puts a complete set of harmonica tools in your pocket. It’s built for harmonica players, but it speaks guitar, ukulele, bass, piano, mandolin, banjo, and more. Look up a chord, find the right harp for a song, identify the key of a progression, and keep track of every harmonica you own - all without leaving the app. WHAT’S INSIDE QuickGuide™ Look up any chord or scale, then see how it lays out on a different instrument. Useful for harmonica players, and just as useful for guitarists, ukulele players, and pianists who want a fast cross-instrument reference. HarmoniFinder™ Tell it your song’s key and feel, and it tells you which Lee Oskar harmonica to grab. Honest rankings, no padded results. Key Detective Tap the chords you’re hearing and the app figures out the key. Hand the result to HarmoniFinder™ and you’re playing. My Collection Track the harmonicas you own. Useful at gigs, useful at home, useful when you’re trying to remember whether you actually own a Low F before you click “buy.” Tuning Workshop Explore the four Lee Oskar tunings, mix and match reed plates between them, and try custom tunings adapted from a wide library, including blues, country, folk, Celtic, jazz, and world music presets. Learn & Care Practical tips for playing positions, troubleshooting common issues, and keeping your harmonicas in good shape. Toolkit, not teacher. WHY HARMONICALLY? • Harmonica-first, but multi-instrument by design • No accounts, no logins, no data collection • Works offline • Free, with no in-app purchases From Lee Oskar Harmonicas, making harmonicas for musicians since 1983.

Screenshots

Metronom 1373 screens
HarmonicAlly4 screens

Verdict

The call

The clearest difference is iOS requirement: HarmonicAlly at 15.1 against Metronom 137's 18.6. On price, update cadence, 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Metronom 137 ships an update every 10 days, HarmonicAlly fortnightly. The most recent releases landed on October 8, 2026 and September 23, 2026 respectively.

Scorecard1 real difference · 9 level
Metronom 137 versus HarmonicAlly: the parameters behind the verdict, then further details
ParameterMetronom 137HarmonicAlly
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 10 days — betterFortnightly
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.615.1 — better
Further details — not scored
Size6 MB38 MB
Age rating4+4+
DeveloperThibault DucrayLee Oskar Enterprises

In-app purchases

None

Metronom 137

No in-app purchases

None

HarmonicAlly

No in-app purchases

Questions

Is Metronom 137 free?
Metronom 137 is free to download, with no in-app purchases.
Is HarmonicAlly free?
HarmonicAlly is free to download, with no in-app purchases.
Do Metronom 137 or HarmonicAlly have ads?
Neither Metronom 137 nor HarmonicAlly shows ads.
Which is updated more often, Metronom 137 or HarmonicAlly?
Metronom 137 ships an update every 10 days, and HarmonicAlly fortnightly. Most recently, Metronom 137 was updated on October 8, 2026 and HarmonicAlly on September 23, 2026.

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