Know The Changes

LiveNerdBoy Software5 apps · 15.3K installsMusic & Audio$1.99uk.co.nerdboy.knowthechanges

Learn jazz standards until you no longer need the chord chart

Alert me★ WatchOpen in Play ↗
Total installs
1
exact · Play shows 1+
Installs / day
0
7-day avg · last day 0
Rating
—★
— ratings · — reviews
Released
21 Aug 2026
2mo ago
Last update
25 Aug 2026
v1.1 · 2mo ago
Countries
—
not checked yet

Installs per day

gain of the exact counter

No change in the counterOur first day-to-day reading of the counter. The line starts with the next one.

Daily tracking since 11 Oct 2026 · history grows every day

Install history

exact counter from Google Play
01211 Oct12 Oct
01234521 Aug11 Oct12 Oct

Dashed: estimate from the release date (no daily data before 11 Oct 2026) · time axis compressed before that day

Daily tracking since 11 Oct 2026 · history grows every day

Change timeline

Full history

No changes recorded yet. We compare every crawl with the previous one and list title, icon, screenshots, description, version, price and availability changes here.

Country availability

Availability has not been checked for this app yet. “Check all countries” looks the app up in about 140 Google Play storefronts and shows where it is live, listed but not installable, or missing — plus any country-specific (custom) store listings.

Top countries

Country data will be available soon.

We estimate where downloads come from using the app’s position in Google Play’s top charts in about 140 countries. This app is not in any chart we have collected yet; the estimate appears as soon as it is.

Top chart positions

Not in any tracked top chart.

App manifest

Read this app's manifest from Google Play: permissions, declared SDKs, components and AdMob app ID. Saved analysis appears here automatically.

Manifest analysis reads only the required APK ranges. Base APK downloads may need separate device splits to install.

Data safety

declared by the developer on Google Play
  • No data shared with third parties
  • No data collected

This is the developer's own declaration, summarised from the Play listing. The permissions below show what the app is technically able to access.

Permissions

1 in 1 group
0 Sensitive0 Notable1 Routine
OtherRoutine1

Access to miscellaneous device features that don't fit other categories

  • Check with Google Play that you got this app legitimatelyGoogle Play license check · com.android.vending.CHECK_LICENSE

Sensitive = can reach personal data, location, camera/mic or act on your behalf. Notable = changes how your device behaves. Routine = normal for almost every app. Source: Google Play's permission list for all versions of this app.

Store listing

Full description
Don't mistake reading the chart for knowing the tune. Know the Changes makes you recall jazz standards without keeping every chord in front of you — a section at a time, in the original key or another, until the chart can disappear completely. I built it for a familiar problem. You can play a standard perfectly well while reading it. Then someone calls it at a gig or jam session, the chart is gone, and suddenly you are not completely sure what happens in the bridge. So Know the Changes removes the safety net gradually. Choose a standard and study the complete chart. Then hide 25%, 50%, 75% or every chord. Autumn Leaves. First eight bars. Some changes remain visible. The others become choices. Fill in the missing bars, check the section and move through the tune until you can reconstruct the entire form. Then make it harder. Hide more of the chart. Choose another key. Find out whether you understand the harmony or have simply memorised a sequence of chord names. It doesn’t teach the melody. It doesn’t give you solos or licks to memorise. And it doesn’t try to be a complete jazz course. That’s deliberate. This app does one job: it gets the changes out of the chart and into your memory. A collection of common jazz standards is included, so you can start practising immediately. Already have your preferred changes in iReal Pro? Share a song or playlist in iReal Pro format and open it directly in Know the Changes. That way you can learn the version you actually play, even when musicians disagree about the changes. Because on the stand, recognising a chart is not the same as knowing the tune. Know the changes. Leave the chart behind. Know the Changes is not affiliated with or endorsed by iReal Pro.

What's new

- Refreshed the bundled Standards with a set of jazz tunes - Fixed a chord-import glitch that could show a stray "U" on some chords

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