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The Blackboard - Lightning-Fast Real-time Collaborative Drawing tool

Chrome extension by Abhishek Sontakke · Productivity · Workflow

  • Established publisher

A Chrome extension in Productivity · Workflow with 551 users, barely installed. Audience over the last 30 days: -12.

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
551
Rating
5.0 (16 ratings)
Users, last 30 days
-12
Rating, last 30 days
Steady over 30 days
Version
2.2.0
Updated in the store
2025-03-05
Published
2022-09-24
Manifest
V3
Browser access
1 permission

How it has moved

Users
-12 since 02.10
530-571 · 18 readings
  1. 2026-10-04530
  2. 2026-10-08559
  3. 2026-10-09566
  4. 2026-10-10571
  5. 2026-10-11570
  6. 2026-10-13567
  7. 2026-10-16552
  8. 2026-10-19549
  9. 2026-10-20555
  10. 2026-10-21569
  11. 2026-10-22555
  12. 2026-10-23541
  13. 2026-10-24546
  14. 2026-10-25544
  15. 2026-10-27532
  16. 2026-10-29542
  17. 2026-10-30551
  18. 2026-10-31551
Rating
unchanged since 02.10
reviewsrating 5.00 · 18 readings
  1. 2026-10-04reviews16rating5.00
  2. 2026-10-08reviews16rating5.00
  3. 2026-10-09reviews16rating5.00
  4. 2026-10-10reviews16rating5.00
  5. 2026-10-11reviews16rating5.00
  6. 2026-10-13reviews16rating5.00
  7. 2026-10-16reviews16rating5.00
  8. 2026-10-19reviews16rating5.00
  9. 2026-10-20reviews16rating5.00
  10. 2026-10-21reviews16rating5.00
  11. 2026-10-22reviews16rating5.00
  12. 2026-10-23reviews16rating5.00
  13. 2026-10-24reviews16rating5.00
  14. 2026-10-25reviews16rating5.00
  15. 2026-10-27reviews16rating5.00
  16. 2026-10-29reviews16rating5.00
  17. 2026-10-30reviews16rating5.00
  18. 2026-10-31reviews16rating5.00
Users
-1 since 31.08
530-571 · 32 readings
  1. 2026-08-31552
  2. 2026-09-02555
  3. 2026-09-04553
  4. 2026-09-06547
  5. 2026-09-07543
  6. 2026-09-08546
  7. 2026-09-09554
  8. 2026-09-13561
  9. 2026-09-15569
  10. 2026-09-16570
  11. 2026-09-20560
  12. 2026-09-21556
  13. 2026-09-27562
  14. 2026-09-28563
  15. 2026-10-04530
  16. 2026-10-08559
  17. 2026-10-09566
  18. 2026-10-10571
  19. 2026-10-11570
  20. 2026-10-13567
  21. 2026-10-16552
  22. 2026-10-19549
  23. 2026-10-20555
  24. 2026-10-21569
  25. 2026-10-22555
  26. 2026-10-23541
  27. 2026-10-24546
  28. 2026-10-25544
  29. 2026-10-27532
  30. 2026-10-29542
  31. 2026-10-30551
  32. 2026-10-31551
Rating
unchanged since 31.08
reviewsrating 5.00 · 32 readings
  1. 2026-08-31reviews16rating5.00
  2. 2026-09-02reviews16rating5.00
  3. 2026-09-04reviews16rating5.00
  4. 2026-09-06reviews16rating5.00
  5. 2026-09-07reviews16rating5.00
  6. 2026-09-08reviews16rating5.00
  7. 2026-09-09reviews16rating5.00
  8. 2026-09-13reviews16rating5.00
  9. 2026-09-15reviews16rating5.00
  10. 2026-09-16reviews16rating5.00
  11. 2026-09-20reviews16rating5.00
  12. 2026-09-21reviews16rating5.00
  13. 2026-09-27reviews16rating5.00
  14. 2026-09-28reviews16rating5.00
  15. 2026-10-04reviews16rating5.00
  16. 2026-10-08reviews16rating5.00
  17. 2026-10-09reviews16rating5.00
  18. 2026-10-10reviews16rating5.00
  19. 2026-10-11reviews16rating5.00
  20. 2026-10-13reviews16rating5.00
  21. 2026-10-16reviews16rating5.00
  22. 2026-10-19reviews16rating5.00
  23. 2026-10-20reviews16rating5.00
  24. 2026-10-21reviews16rating5.00
  25. 2026-10-22reviews16rating5.00
  26. 2026-10-23reviews16rating5.00
  27. 2026-10-24reviews16rating5.00
  28. 2026-10-25reviews16rating5.00
  29. 2026-10-27reviews16rating5.00
  30. 2026-10-29reviews16rating5.00
  31. 2026-10-30reviews16rating5.00
  32. 2026-10-31reviews16rating5.00

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.

  • See the address and title of every tab you have open tabs

The full permission history for this extension

What changed recently

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

The publisher

Abhishek Sontakke publishes 2 listings we track, 818 users between them. Listed website: tryblackboard.com.

  1. Networkly - LinkedIn Automation, Bulk Messaging & Connections Abhishek Sontakke · Productivity · Tools · published 2025-10-18 267 users ★ 5.0

Like this one

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

  1. Online Drawing Pad Describes nearly the same job, smaller audience 36 users
  2. Whiteboard Online Describes nearly the same job, smaller audience 1k users ★ 5.0
  3. Annotate Together - Screen Drawing Tool Describes nearly the same job, smaller audience 716 users ★ 1.0
  4. ShadeSurfer Whiteboard Drawing Tool Describes nearly the same job, smaller audience 12 users
  5. Whiteboard Describes nearly the same job, smaller audience 5k users ★ 2.8

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

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HTML

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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 2026-10-30. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built