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Virtual Harmonograph

Chrome Web Store listing by WorldTree Software

  • Established publisher

A Chrome extension with 161 users, barely installed. Audience over the last 30 days: -3.

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

What the developer says, and 5 screenshots

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

Users
161
Rating
4.7 (3 ratings)
Users, last 30 days
-3
Rating, last 30 days
Steady over 30 days
Version
2.3
Updated in the store
2016-02-06
Published
2016-02-06
Manifest
V2
Browser access
No permissions declared

How it has moved

Users
-3 since 04.10
158-167 · 19 readings
  1. 2026-10-04164
  2. 2026-10-09161
  3. 2026-10-10158
  4. 2026-10-13163
  5. 2026-10-16166
  6. 2026-10-17165
  7. 2026-10-18164
  8. 2026-10-19158
  9. 2026-10-21159
  10. 2026-10-22160
  11. 2026-10-24165
  12. 2026-10-25160
  13. 2026-10-26166
  14. 2026-10-28167
  15. 2026-10-29162
  16. 2026-10-30163
  17. 2026-11-01162
  18. 2026-11-02161
  19. 2026-11-03161
Rating
unchanged since 04.10
reviewsrating 4.67 · 19 readings
  1. 2026-10-04reviews3rating4.67
  2. 2026-10-09reviews3rating4.67
  3. 2026-10-10reviews3rating4.67
  4. 2026-10-13reviews3rating4.67
  5. 2026-10-16reviews3rating4.67
  6. 2026-10-17reviews3rating4.67
  7. 2026-10-18reviews3rating4.67
  8. 2026-10-19reviews3rating4.67
  9. 2026-10-21reviews3rating4.67
  10. 2026-10-22reviews3rating4.67
  11. 2026-10-24reviews3rating4.67
  12. 2026-10-25reviews3rating4.67
  13. 2026-10-26reviews3rating4.67
  14. 2026-10-28reviews3rating4.67
  15. 2026-10-29reviews3rating4.67
  16. 2026-10-30reviews3rating4.67
  17. 2026-11-01reviews3rating4.67
  18. 2026-11-02reviews3rating4.67
  19. 2026-11-03reviews3rating4.67
Users
-9 since 01.09
156-171 · 31 readings
  1. 2026-09-01170
  2. 2026-09-02171
  3. 2026-09-05166
  4. 2026-09-06164
  5. 2026-09-08164
  6. 2026-09-10161
  7. 2026-09-13162
  8. 2026-09-15164
  9. 2026-09-17170
  10. 2026-09-21163
  11. 2026-09-25157
  12. 2026-09-28156
  13. 2026-10-04164
  14. 2026-10-09161
  15. 2026-10-10158
  16. 2026-10-13163
  17. 2026-10-16166
  18. 2026-10-17165
  19. 2026-10-18164
  20. 2026-10-19158
  21. 2026-10-21159
  22. 2026-10-22160
  23. 2026-10-24165
  24. 2026-10-25160
  25. 2026-10-26166
  26. 2026-10-28167
  27. 2026-10-29162
  28. 2026-10-30163
  29. 2026-11-01162
  30. 2026-11-02161
  31. 2026-11-03161
Rating
unchanged since 01.09
reviewsrating 4.67 · 31 readings
  1. 2026-09-01reviews3rating4.67
  2. 2026-09-02reviews3rating4.67
  3. 2026-09-05reviews3rating4.67
  4. 2026-09-06reviews3rating4.67
  5. 2026-09-08reviews3rating4.67
  6. 2026-09-10reviews3rating4.67
  7. 2026-09-13reviews3rating4.67
  8. 2026-09-15reviews3rating4.67
  9. 2026-09-17reviews3rating4.67
  10. 2026-09-21reviews3rating4.67
  11. 2026-09-25reviews3rating4.67
  12. 2026-09-28reviews3rating4.67
  13. 2026-10-04reviews3rating4.67
  14. 2026-10-09reviews3rating4.67
  15. 2026-10-10reviews3rating4.67
  16. 2026-10-13reviews3rating4.67
  17. 2026-10-16reviews3rating4.67
  18. 2026-10-17reviews3rating4.67
  19. 2026-10-18reviews3rating4.67
  20. 2026-10-19reviews3rating4.67
  21. 2026-10-21reviews3rating4.67
  22. 2026-10-22reviews3rating4.67
  23. 2026-10-24reviews3rating4.67
  24. 2026-10-25reviews3rating4.67
  25. 2026-10-26reviews3rating4.67
  26. 2026-10-28reviews3rating4.67
  27. 2026-10-29reviews3rating4.67
  28. 2026-10-30reviews3rating4.67
  29. 2026-11-01reviews3rating4.67
  30. 2026-11-02reviews3rating4.67
  31. 2026-11-03reviews3rating4.67

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

WorldTree Software publishes 2 listings we track, 455 users between them. Listed website: worldtreesoftware.com.

  1. Power Chord WorldTree Software · published 2015-12-14 294 users ★ 4.3

Like this one

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  1. Kitty7 Describes nearly the same job, smaller audience 45 users ★ 5.0
  2. Geometric Visualizer Tool Describes nearly the same job, smaller audience 303 users ★ 4.1
  3. Wave Artist Describes nearly the same job, smaller audience 21 users
  4. CoordinateDraw Describes nearly the same job, smaller audience 7 users
  5. Fun Draw Describes nearly the same job, smaller audience 70 users

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.

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Users and rating on Ext Ops Panel

Markdown

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

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Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-11-02. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built