Know The Changes Downloads & RevenueKnow The Changes: Jazz Chords · App Store
Not in any tracked top chart right now.
Updated 11 Nov 2026 · rankings refresh through the day
DeveloperJoe Gass
CategoryMusic
Price1.99 GBP
Released
Rating★ 0.0 (0)
Version1.1.2
Age rating4+
First seen by us
3 Oct 2026
3 Oct 2026Know The Changes: Jazz Chords update history & changes
Last change · 8 events since 25 Aug 2026Full timeline ↓📈Entered the top 100📈Charting in a new country🆕First spotted by AppInsider📦Version 1.1.2🆕Its developer released another app: LoopBook: Practice Clips
Full timeline · 8 events
- 📈Know The Changes: Jazz Chords entered the top 100Top Paid · Music · JP
- 📈Know The Changes: Jazz Chords charting in a new countryJapan
- 🆕Know The Changes: Jazz Chords first spotted by AppInsider#83 in Top Paid · Music · United Kingdom
- 📦Know The Changes: Jazz Chords version 1.1.2Updating store description only
- 🆕Know The Changes: Jazz Chords: its developer released another app: LoopBook: Practice Clips
- 🆕Know The Changes: Jazz Chords: its developer released another app: SoundPad+ Soundboard
- 🆕Know The Changes: Jazz Chords: its developer released another app: Walking Bass Trainer
- 🆕Know The Changes: Jazz Chords released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
0.0 ★
0 ratings
Measured
Know The Changes: Jazz Chords on the App Store
App details
App ID
6804006050
Publisher
Joe Gass
On the store since
Aug 2026
Under a year
Minimum OS
iOS 17.0+
iPhone XS and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
1
EN
Size
4 MB
Also listed in
Education
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
0.0 ★
0 ratings
Measured
Ratings
0
Measured
About Know The Changes: Jazz Chords
You can play a standard perfectly well while reading it. Then someone calls it at a jam, the chart is gone, and you're not sure what happens in the bridge.
Know the Changes takes the safety net away gradually, so the changes move out of the chart and into your memory.
How it works
• Study the full chart
• Hide 25%, 50%, 75% or every chord
• Fill in the missing bars from a set of choices
• Check each section, then work through the whole form
• Switch keys to find out whether you know the harmony or just a sequence of chord names
Learn the version you actually play
Share a song or playlist from iReal Pro and open it directly in the app. Musicians disagree about changes, so you should be practicing your version. Or start right away with the built-in library of jazz standards.
Different every session
Hidden bars change each time, so you can't get by memorizing the pattern.
One job, done well
No melodies, licks or solos, and it isn't a jazz course. It does one thing: recall.
Family Sharing supported. No data collected.
Know the changes. Leave the chart behind.
Know the Changes is not affiliated with or endorsed by iReal Pro.
Know the Changes takes the safety net away gradually, so the changes move out of the chart and into your memory.
How it works
• Study the full chart
• Hide 25%, 50%, 75% or every chord
• Fill in the missing bars from a set of choices
• Check each section, then work through the whole form
• Switch keys to find out whether you know the harmony or just a sequence of chord names
Learn the version you actually play
Share a song or playlist from iReal Pro and open it directly in the app. Musicians disagree about changes, so you should be practicing your version. Or start right away with the built-in library of jazz standards.
Different every session
Hidden bars change each time, so you can't get by memorizing the pattern.
One job, done well
No melodies, licks or solos, and it isn't a jazz course. It does one thing: recall.
Family Sharing supported. No data collected.
Know the changes. Leave the chart behind.
Know the Changes is not affiliated with or endorsed by iReal Pro.
Latest updates
1.1.2
Updating store description only
