Comparison

OnKey Lite vs Sonofield Ear Trainer

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

Head to head
About

OnKey Lite

This app generates readable, note-based exercises for practicing musical scales and chords. It's ideal for warm-ups, technique drills, or theory work, catering to musicians of all levels. Customize your practice with various patterns, keys, and note name options.

Highlights
  • Generate note-based exercises
  • Practice scales and chords
  • Transpose to any key
  • Set range and clef
  • Choose from various patterns
  • Add note names and time signatures
Features
Read full description

OnKey Lite is a simple, effective tool that helps musicians practice scales and chords with clarity and focus. Just enter your preferences and instantly generate readable, note-based exercises—no more flipping through books or writing them out by hand. Perfect for warm-ups, technique drills, or theory work, whether you're a beginner or an advanced player. Features: Select your scale or chord type Transpose to any key Set your range and clef Choose from various patterns Add note names and time signatures Designed for flexibility. Built for clarity. For all instruments.

About

Sonofield Ear Trainer

This app helps musicians develop their ear by focusing on the feeling of individual notes within a key, rather than traditional interval training. It uses sustained drones and offers various modes like identifying scale degrees, melodies, and singing exercises. The app adapts to your skill level with an intuitive interface and progression path.

Highlights
  • Feeling-based note recognition
  • Scale degree identification
  • Melody recognition training
  • Singing exercises
  • Hands-free training mode
  • Interactive exploration instrument
Features
Read full description

Sonofield Ear Trainer (SET) is a revolutionary ear training app designed to help you intuitively play the melodies you hear and imagine. Instead of relying on traditional old methods like intervals, SET focuses on helping you feel the unique character of each note within a key. By using sustained drones to create a tonal foundation, you’ll learn to recognize scale degrees based on their *feeling*, not just how they sound. The app offers a variety of ways to train: * Degrees Mode - Identify individual notes against the drone by feeling. The heart of SET. * Melody Mode - Identify short melodic phrases, preparing you for real music. * Voice Mode - Sing the requested scale degree into your microphone. * Pocket Mode - Hands-free training for when you're on the go. * Free Play - An interactive instrument for exploration. With its intuitive, color-coded interface, thoughtfully designed progression path, and multiple difficulty levels, SET adapts to your skill level while keeping practice engaging. Whether you're a beginner or an experienced musician, SET is your guide to unlocking true musical fluency through intuitive, feeling-based ear training. No ads or forced payments. The free version contains full foundations for feeling-based ear training. Download the ear training app now!

Screenshots

OnKey Lite4 screens
Sonofield Ear Trainer4 screens

Verdict

The call

The clearest difference is in-app purchases: OnKey Lite at none against Sonofield Ear Trainer's 5. OnKey Lite also leads on review sentiment (100% vs 89%). Sonofield Ear Trainer's advantage is update cadence (every 9 days vs every 3 months) and rating (4.9 vs 4.5). 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. Sonofield Ear Trainer sells 4 one-off in-app purchases. OnKey Lite asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sonofield Ear Trainer holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: Sonofield Ear Trainer has 392 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 100% of OnKey Lite's written reviews are positive against 89% of Sonofield Ear Trainer's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

OnKey Lite ships an update every 3 months, Sonofield Ear Trainer every 9 days. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

Scorecard6 real differences · 4 level
OnKey Lite versus Sonofield Ear Trainer: the parameters behind the verdict, then further details
ParameterOnKey LiteSonofield Ear Trainer
PriceFreeFree
Rating4.5 (2 ratings)4.9 (392 ratings) — better
Positive reviews100.0% of reviews — better88.8% of reviews
Number of ratings2392 — better
Update frequencyEvery 3 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.013.0 — better
Further details — not scored
Size1 MB105 MB
Age rating4+4+
DeveloperRea MeirSonofield Ear Trainer Education Ltd.

Customer experience

OnKey Lite

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Sonofield Ear Trainer

All ratings387 ratings
Positive97.4%
Neutral1.6%
Negative1.0%
Written reviews152 reviews
Positive88.8%
Neutral6.6%
Negative4.6%

Bugs and requests

OnKey Lite

Not enough reviews yet to summarise bugs or requests.

Sonofield Ear Trainer

Reported bugs

1 issue
  • None reported

Requested features

5 requests
  • Option to switch between 12TET and just intonation
  • Ability to reduce octave range
  • Incorporate more timbre options for drone and notes
  • Tracking and visualization of progress and learned skills
  • Add interactive tutorial for level 1

In-app purchases

None

OnKey Lite

No in-app purchases

4 purchases

Sonofield Ear Trainer

One-time4
  • Lifetime Pro$14.99
  • Lifetime Pro$17.99
  • Lifetime Pro2 variants$19.99
Show 1 more
  • Lifetime Pro$24.99

Questions

Is OnKey Lite free?
OnKey Lite is free to download, with no in-app purchases.
Is Sonofield Ear Trainer free?
Sonofield Ear Trainer is free to download, with in-app purchases available.
Which has better reviews, OnKey Lite or Sonofield Ear Trainer?
Sonofield Ear Trainer is rated higher. OnKey Lite averages 4.5 out of 5 from 2 ratings, while Sonofield Ear Trainer averages 4.9 from 392 ratings.
Do OnKey Lite or Sonofield Ear Trainer have ads?
Neither OnKey Lite nor Sonofield Ear Trainer shows ads.
Which is updated more often, OnKey Lite or Sonofield Ear Trainer?
OnKey Lite ships an update every 3 months, and Sonofield Ear Trainer every 9 days. Most recently, OnKey Lite was updated on November 3, 2026 and Sonofield Ear Trainer on November 8, 2026.

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