Comparison

Harmonic Analysis vs LessonKeeper

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

Head to head
About

Harmonic Analysis

Master music theory with interactive exercises focused on chord and Roman numeral analysis. Practice constructing chords, analyzing progressions, and improving your musical ear through various training modes and customizable settings.

Highlights
  • Chord to Roman numeral training
  • Chord construction exercises
  • Chord construction with keyboard
  • Chord progression analysis
  • Selectable difficulty levels
  • Support for inverted chords
  • Performance reports
Features
Read full description

"This app is a great way to learn your chords. It is simple, robust and well written, and has positive comments when you start it up." -- 5-Star App Store Review Master Roman numeral analysis and chord progressions. Whether you are preparing for AP Music Theory, ABRSM exams, or college-level harmony classes, Harmonic Analysis is your complete pocket tutor for understanding how chords work. Ditch the paper worksheets and practice interactively through four dedicated training modules: Roman Numeral Analysis • Identify the correct Roman numeral for the chord displayed on the staff. Chord Construction • Read a Roman numeral and build the correct chord directly on the sheet music. Keyboard Construction • Translate theory to practice by constructing the requested chord on an interactive piano keyboard. Progression Analysis • Analyze a sequence of Roman numerals and select the correct musical progression. Core Features for Serious Musicians • Comprehensive Clefs: Practice in Treble, Bass, Soprano, Alto, Tenor, and Baritone clefs. • All Keys Covered: Work across all 15 major and 15 minor key signatures. • Inversions: Full support for root position and inverted chords. • Audio Playback: Hear what you build—play and arpeggiate chords to train your ear alongside your eyes. • Smart Review: Flag difficult questions and keep a dedicated list for focused review sessions. • Track Progress: Monitor your accuracy and growth with detailed performance reports. Subscriptions • Payment will be charged to your Apple ID account at the confirmation of purchase. • The subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. • Your account will be charged for renewal within 24 hours prior to the end of the current period. • You can manage and cancel your subscriptions by going to your App Store account settings after purchase. • You will not be able to cancel the subscription once activated. Support & FAQ Do you have any questions? Visit our FAQ page at https://sightsinging.app/faq for detailed instructions and troubleshooting tips. You also can reach us by email at support@sightsinging.app. • Terms & Conditions https://sightsinging.app/terms-and-conditions • Privacy Policy https://sightsinging.app/privacy-policy

About

LessonKeeper

Create and share engaging lessons with students using rich media like text, images, audio, and video. Students can access lessons via a web link without needing the app. Track student progress, manage payments, and sync data across devices.

Highlights
  • Create multimedia-rich lessons
  • Share lessons via web link
  • Real-time lesson edits
  • Student progress tracking
  • Payment and invoice management
  • Cross-device data sync
  • Export lesson data to CSV
Features
Read full description

LessonKeeper is a virtual lesson notebook that lets you stay in-sync with your students, whether you’re doing lessons online or in person. Easily create shareable lessons filled with text, images, audio, YouTube clips, PDFs, and more. Then, send the lesson to your student via email, Messages, or any other system where they can receive a link. The student doesn’t need an app to access the lesson — all they need is an internet-enabled device that can access a webpage. Students can view the lessons on their device, including listening to sound clips you’ve recorded, watch embedded YouTube videos, etc. Plus, if you edit the lesson, the student sees the edits without you having to send the information again — it just appears on their lesson. LessonKeeper is free to use for up to 3 students and 5 lessons per week, with limits on how much multimedia you can upload. With a monthly or yearly subscription plan, you unlock all of the app’s features. LessonKeeper features: - Easily keep records of your students and their lessons - Build multimedia rich lessons including text, checklists, images, PDFs, YouTube clips, audio clips, and more - Send lessons to students in a variety of ways including email, Messages, etc - Sync your data between LessonKeeper on multiple devices - Students can respond to assignments, including uploading their own audio clips - Keep track of what students owe and pay using LessonKeeper’s ledger system - Easily send invoices to students - Export CSV (spreadsheet) files with lesson data for all your lessons and students, or filtered by search criteria Subscription info: - LessonKeeper offers monthly or yearly auto-renewing subscription plans in order to access its full set of features. - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase - Privacy policy: https://lessonkeeper.app/privacy.html / Terms of use: https://lessonkeeper.app/terms.html - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable.

Screenshots

Harmonic Analysis4 screens
LessonKeeper4 screens

Verdict

The call

The clearest difference is review sentiment: LessonKeeper at 100% against Harmonic Analysis's 50%. LessonKeeper also leads on rating (5.0 vs 4.8) and device support (4 vs 1). Harmonic Analysis's advantage is update cadence (every 2 days vs every 2 weeks) and ratings volume (22 vs 3). On price, ads, in-app purchases and monetization model 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. Harmonic Analysis sells 3 in-app purchases, starting at $3.99 per month and LessonKeeper sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

LessonKeeper holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Harmonic Analysis has 22 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 50% of Harmonic Analysis's written reviews are positive against 100% of LessonKeeper's.

UpkeepUpdate frequency

Harmonic Analysis ships an update every 2 days, LessonKeeper every 2 weeks. The most recent releases landed on September 18, 2026 and September 22, 2026 respectively.

Scorecard6 real differences · 4 level
Harmonic Analysis versus LessonKeeper: the parameters behind the verdict, then further details
ParameterHarmonic AnalysisLessonKeeper
PriceFreeFree
Rating4.8 (22 ratings)5.0 (3 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings22 — better3
Update frequencyEvery 2 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhoneiPhone, iPad, iPod, Mac — better
Requires iOS17.615.0 — better
Further details — not scored
Size84 MB11 MB
Age rating4+4+
DeveloperDeeryard LLCJohn Nastos

Customer experience

Harmonic Analysis

All ratings22 ratings
Positive90.9%
Neutral4.5%
Negative4.5%
Written reviews6 reviews
Positive50.0%
Neutral33.3%
Negative16.7%

LessonKeeper

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Harmonic Analysis

Subscriptions2
  • Premium Access Monthly$3.991 Month
  • Premium Access Yearly$39.991 Year
One-time1
  • One-time Payment$159.99
2 purchases

LessonKeeper

Subscriptions2
  • Monthly Subscription$7.991 Month
  • Yearly Subscription$79.991 Year

Questions

Is Harmonic Analysis free?
Harmonic Analysis is free to download, with in-app purchases available.
Is LessonKeeper free?
LessonKeeper is free to download, with in-app purchases available.
Which has better reviews, Harmonic Analysis or LessonKeeper?
LessonKeeper is rated higher. Harmonic Analysis averages 4.8 out of 5 from 22 ratings, while LessonKeeper averages 5.0 from 3 ratings.
Do Harmonic Analysis or LessonKeeper have ads?
Neither Harmonic Analysis nor LessonKeeper shows ads.
Which is updated more often, Harmonic Analysis or LessonKeeper?
Harmonic Analysis ships an update every 2 days, and LessonKeeper every 2 weeks. Most recently, Harmonic Analysis was updated on September 18, 2026 and LessonKeeper on September 22, 2026.

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