Ext Ops Panel
Open dashboard

Noppi - note practice program for instruments

Chrome Web Store listing by Slim Sim

  • Trader

A Chrome extension with 72 users, barely installed. Audience over the last 30 days: +1.

No site access is declared in the manifest, so it cannot read the pages you open on its own.

What the developer says, and 1 screenshot

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
72
Rating
1.0 (1 ratings)
Users, last 30 days
+1
Rating, last 30 days
Steady over 30 days
Version
0.2.1
Updated in the store
2015-04-28
Published
2015-04-16
Manifest
V2
Browser access
No permissions declared

How it has moved

Users
+1 since 12.10
49-72 · 17 readings
  1. 2026-10-1370
  2. 2026-10-1665
  3. 2026-10-1767
  4. 2026-10-1868
  5. 2026-10-1965
  6. 2026-10-2064
  7. 2026-10-2363
  8. 2026-10-2461
  9. 2026-10-2564
  10. 2026-10-2865
  11. 2026-10-2963
  12. 2026-11-0149
  13. 2026-11-0362
  14. 2026-11-0669
  15. 2026-11-0870
  16. 2026-11-1071
  17. 2026-11-1172
Rating
unchanged since 12.10
reviewsrating 1.00 · 17 readings
  1. 2026-10-13reviews1rating1.00
  2. 2026-10-16reviews1rating1.00
  3. 2026-10-17reviews1rating1.00
  4. 2026-10-18reviews1rating1.00
  5. 2026-10-19reviews1rating1.00
  6. 2026-10-20reviews1rating1.00
  7. 2026-10-23reviews1rating1.00
  8. 2026-10-24reviews1rating1.00
  9. 2026-10-25reviews1rating1.00
  10. 2026-10-28reviews1rating1.00
  11. 2026-10-29reviews1rating1.00
  12. 2026-11-01reviews1rating1.00
  13. 2026-11-03reviews1rating1.00
  14. 2026-11-06reviews1rating1.00
  15. 2026-11-08reviews1rating1.00
  16. 2026-11-10reviews1rating1.00
  17. 2026-11-11reviews1rating1.00
Users
-6 since 01.09
49-82 · 34 readings
  1. 2026-09-0178
  2. 2026-09-0382
  3. 2026-09-0479
  4. 2026-09-0677
  5. 2026-09-0779
  6. 2026-09-0876
  7. 2026-09-1075
  8. 2026-09-1376
  9. 2026-09-1578
  10. 2026-09-1776
  11. 2026-09-2174
  12. 2026-09-2570
  13. 2026-09-2663
  14. 2026-09-2862
  15. 2026-10-0563
  16. 2026-10-0966
  17. 2026-10-1071
  18. 2026-10-1370
  19. 2026-10-1665
  20. 2026-10-1767
  21. 2026-10-1868
  22. 2026-10-1965
  23. 2026-10-2064
  24. 2026-10-2363
  25. 2026-10-2461
  26. 2026-10-2564
  27. 2026-10-2865
  28. 2026-10-2963
  29. 2026-11-0149
  30. 2026-11-0362
  31. 2026-11-0669
  32. 2026-11-0870
  33. 2026-11-1071
  34. 2026-11-1172
Rating
unchanged since 01.09
reviewsrating 1.00 · 34 readings
  1. 2026-09-01reviews1rating1.00
  2. 2026-09-03reviews1rating1.00
  3. 2026-09-04reviews1rating1.00
  4. 2026-09-06reviews1rating1.00
  5. 2026-09-07reviews1rating1.00
  6. 2026-09-08reviews1rating1.00
  7. 2026-09-10reviews1rating1.00
  8. 2026-09-13reviews1rating1.00
  9. 2026-09-15reviews1rating1.00
  10. 2026-09-17reviews1rating1.00
  11. 2026-09-21reviews1rating1.00
  12. 2026-09-25reviews1rating1.00
  13. 2026-09-26reviews1rating1.00
  14. 2026-09-28reviews1rating1.00
  15. 2026-10-05reviews1rating1.00
  16. 2026-10-09reviews1rating1.00
  17. 2026-10-10reviews1rating1.00
  18. 2026-10-13reviews1rating1.00
  19. 2026-10-16reviews1rating1.00
  20. 2026-10-17reviews1rating1.00
  21. 2026-10-18reviews1rating1.00
  22. 2026-10-19reviews1rating1.00
  23. 2026-10-20reviews1rating1.00
  24. 2026-10-23reviews1rating1.00
  25. 2026-10-24reviews1rating1.00
  26. 2026-10-25reviews1rating1.00
  27. 2026-10-28reviews1rating1.00
  28. 2026-10-29reviews1rating1.00
  29. 2026-11-01reviews1rating1.00
  30. 2026-11-03reviews1rating1.00
  31. 2026-11-06reviews1rating1.00
  32. 2026-11-08reviews1rating1.00
  33. 2026-11-10reviews1rating1.00
  34. 2026-11-11reviews1rating1.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

No site access is declared in the manifest, so it cannot read the pages you open on its own.

We have not read this listing's manifest since we started keeping permission names. The counts above come from the last time we did.

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

Slim Sim publishes 4 listings we track, 1k users between them.

  1. Petra - Unsupported - Personal trainer! Slim Sim · published 2014-08-16 602 users ★ 4.4
  2. Old Troff - Training with music Slim Sim · published 2014-04-26 415 users ★ 4.7
  3. Swingkatten dans- och kulturförening Slim Sim · published 2014-05-15 7 users ★ 5.0

Like this one

Listings the catalog judges closest in what they say they do.

  1. fret{notes} Describes nearly the same job, smaller audience 520 users ★ 5.0
  2. Guitar Tools Describes nearly the same job, smaller audience 4 users (last published figure)
  3. Chord Gosu Describes nearly the same job, smaller audience 3 users
  4. Sheet Music Composer Describes nearly the same job, smaller audience 188 users ★ 5.0
  5. Browser Synth Describes nearly the same job, smaller audience 17 users ★ 5.0

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Want this mark on your extension in our catalog?

Verify that you are its author and you can show this mark on the card, with live banners for your site and README. How verification works

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

Connect it in a minute See what the panel does
Add a badge to your README or site

The badge shows the audience and rating from our last pass over the store and links back to this page.

Users and rating on Ext Ops Panel

Markdown

[![Users and rating on Ext Ops Panel](https://extops.dev/extensions/igpkebkjfcfabiiihjbgdfogjnefppgk/badge.svg)](https://extops.dev/extensions/igpkebkjfcfabiiihjbgdfogjnefppgk)

HTML

<a href="https://extops.dev/extensions/igpkebkjfcfabiiihjbgdfogjnefppgk"><img src="https://extops.dev/extensions/igpkebkjfcfabiiihjbgdfogjnefppgk/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>

Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-11-11. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built