Music theory can be empowering, exciting, and one of the biggest tools in your creative arsenal. Whether you already play an instrument or are just learning, Waay teaches you how to bring together notes into melodies, chords, progressions, and even songs. This is applied music theory—stuff you can take straight to your instrument and use.


Read what people are saying about Waay:

"It's obvious a lot of time, love and energy has gone into this app. It's very well thought out, easy to follow and keeps you coming back for more. The developer is super friendly and answers any questions you have. It's clear he has a real passion for what he does and genuinely wants to help out. Awesome work all round" —thatboyswiss (Waay user), Jan. 8, 2019

"The app is very smooth, and a great resource for learning more about music theory. I found the scale exercises to be very helpful, and I suspect I'll go back to them as a way of keeping those skills sharp." —Sean Garland (App reviewer, iOS MARS)

"I have probably spent thousands of dollars perfecting tone on pedals, instruments, amps and apps, posters, printed media, online courses. The BEST PURCHASE has been your Waay app." —A.P. (Waay user), Apr. 1, 2020

"If only the theory class I dropped out of was as easy and engaging! This is definitely the best way to learn theory. Waay to go!" —Rob Davis (Waay user, Guitarist)

"Whether you are a beginner or someone who wants to brush up on their music theory skills, I would recommend Waay!" —Lisa Chan (Music instructor, pianist, singer)

"I think this app is one of the best in the App Store for music theory. I don't usually comment or give ratings ever, but I just have to make people more aware. I feel that they took a lot of time to make the videos and the games [so] that you actually understand and memorize the lesson all together." —Superlink245 (Waay user), Sep. 13, 2019


You're writing a song, but keep getting stuck. What chords sound good together? What melody fits those chords? Waay helps you master these skills with its interactive exercises, bite-sized video lessons, musical examples, and progress tracking tools. Plus there's no Internet connection required! Perfect for your subway commutes and plane adventures.

Here’s what you’ll learn in each course:

Course 1: "Melodies"
• 8 video lessons, 9 interactive exercises
• Notes and steps: What are the 12 notes in music and how do we talk about them?
• Intervals: Steps, half-steps, and moving between notes
• Keys: Learn what notes sound good together and hear audio examples
• Scale building: Build major and minor scales from scratch
• Songwriting: Learn how to use theory to write music
• Circle of fifths: The super-fast way to build scales… and more
• Melodies: Apply music theory to writing melodies

Course 2: "Chords"
• 8 video lessons, 11 interactive exercises
• Chord foundations: Thirds and fifths—the building blocks of chords
• Building chords: Build major, minor, or diminished chords with just two intervals
• Songwriting: We write a song melody-first and then add just the right chords
• Magic formula: How do we know what chords sound good together?
• Chords in major and minor keys: Find the right chords for your key
Also included:
• Relative major: The special relationship between major and minor scales
• Fast minor scales: Take your scale skills to the next level

Courses 3 & 4: "Progressions" (available as in-app purchase)
• 10 video lessons, 30 interactive exercises
• Formula fluency: The fundamental relationship between keys and chords
• Key identification: Identify the key of a chord progression with six very speedy tricks
• Shortlisting: Find chords to fit your chord progressions
• Musical judgement: Decide which chords *you* like best in your progressions
• ii V: Why is the ii V progression so important anyways?
• Choosing accidentals: Is it a sharp or flat? Learn that here

Get in touch at alex[at]tenkettles[dot]com if you have any questions—happy to help. -Alex

What’s New

Version 2.5.1

New course available! In "Progressions," you'll learn all about chord progressions: how to identify the key of a progression, shortlist possible chords that'll fit, and then use your musical judgment to move forward.

And there's a lot more too, like new intervals and how to build a "ii V" progression. Once you're all done, you'll be able to complete (I'm not kidding) over 2200 chord progressions in a snap. Progressions I & II are now available as a single in-app purchase. Tap the "Courses" button in the sidebar to get started!

Here's what else is new:
• Double-tap videos to jump back 10 s
• All exercises tweaked to avoid occasional repeated questions
• Design improvements
• More efficient video format for smaller app size (even with new courses)
• Tweaks and bug fixes

Questions, comments, feedback? Get in touch anytime at alex[at]tenkettles[dot]com. -Alex

Ratings and Reviews

4.9 out of 5
566 Ratings

566 Ratings

Superlink245 ,

Highly underrated app

I think this app is one of the best in the App Store for music theory. I don’t usually comment or give ratings ever, but I just have to make people more aware. I feel that they took a lot of time to make the videos and the games they have to make sure that you actually understand and memorize the lesson all together. I have looked at many videos on music theory and the circle of fifth and I feel that this is the most understanding way that it has been broken down to me. How you can’t continue the lesson unless you’ve reached a certain quota is perfect. The way the lessons are broken down into 5-6 minute videos is great for someone like me who loses his attention too easily. It always kept me coming back and wanting to learn more. The only problem I can see coming from the app is that maybe main hub screen is a little boring and can make you think that you aren’t gonna have fun while learning but I was really surprised when I started watching the first video. I hope to see more lessons in the future from this app!

beanie_cuves ,

The key that finally opened the door

I struggled for YEARS with music theory, everyone kept raving about how simple it is, and I always felt confused and stubborn with anything regarding music theory. However I owe everything to this app for finally unlocking the door, it explained everything easily and effortlessly and now I’m able to learn even more theory after using this as my building block. If you still don’t understand or get frustrated do not give up! I even deleted this app from my phone for a year, came back and now I’m finally understanding of music theory. Thank you to the creators of this app!

Rybechka ,

Simply fantastic

Although I’ve never left an app review before, I feel compelled to voice my support for this program. This is by far the cleanest, simplest explanation of basic music theory that I’ve ever encountered. The tutorials, exercises, and overall course design are all excellent. After years of playing various instruments, I finally feel equipped with the fundamentals of theory—something I’d always avoided because it seemed too difficult to learn on my own. I’ve enjoyed this app so much that I could go on and on praising it, but in short: it’s certainly the most worthwhile app purchase I’ve ever made. Thank you!

App Privacy

The developer, Ten Kettles Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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