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SBGBook Grade Calculator

Chrome extension by Tanner Klipstein · Productivity · Tools

A Chrome extension in Productivity · Tools with 11 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
11
Rating
5.0 (1 ratings)
Users, last 30 days
-1
Rating, last 30 days
Steady over 30 days
Version
1.0
Updated in the store
2025-05-16
Published
2025-05-14
Manifest
V3
Browser access
2 permissions

How it has moved

Users
-1 since 02.10
11-15 · 13 readings
  1. 2026-10-0811
  2. 2026-10-0912
  3. 2026-10-1011
  4. 2026-10-1312
  5. 2026-10-1813
  6. 2026-10-1912
  7. 2026-10-2013
  8. 2026-10-2114
  9. 2026-10-2213
  10. 2026-10-2415
  11. 2026-10-2514
  12. 2026-10-2813
  13. 2026-11-0111
Rating
unchanged since 02.10
reviewsrating 5.00 · 13 readings
  1. 2026-10-08reviews1rating5.00
  2. 2026-10-09reviews1rating5.00
  3. 2026-10-10reviews1rating5.00
  4. 2026-10-13reviews1rating5.00
  5. 2026-10-18reviews1rating5.00
  6. 2026-10-19reviews1rating5.00
  7. 2026-10-20reviews1rating5.00
  8. 2026-10-21reviews1rating5.00
  9. 2026-10-22reviews1rating5.00
  10. 2026-10-24reviews1rating5.00
  11. 2026-10-25reviews1rating5.00
  12. 2026-10-28reviews1rating5.00
  13. 2026-11-01reviews1rating5.00
Users
unchanged since 31.08
0-15 · 23 readings
  1. 2026-08-3111
  2. 2026-09-020
  3. 2026-09-0311
  4. 2026-09-0510
  5. 2026-09-0711
  6. 2026-09-0814
  7. 2026-09-1013
  8. 2026-09-1515
  9. 2026-09-2214
  10. 2026-09-2812
  11. 2026-10-0811
  12. 2026-10-0912
  13. 2026-10-1011
  14. 2026-10-1312
  15. 2026-10-1813
  16. 2026-10-1912
  17. 2026-10-2013
  18. 2026-10-2114
  19. 2026-10-2213
  20. 2026-10-2415
  21. 2026-10-2514
  22. 2026-10-2813
  23. 2026-11-0111
Rating
unchanged since 31.08
reviewsrating 5.00 · 23 readings
  1. 2026-08-31reviews1rating5.00
  2. 2026-09-02reviews1rating5.00
  3. 2026-09-03reviews1rating5.00
  4. 2026-09-05reviews1rating5.00
  5. 2026-09-07reviews1rating5.00
  6. 2026-09-08reviews1rating5.00
  7. 2026-09-10reviews1rating5.00
  8. 2026-09-15reviews1rating5.00
  9. 2026-09-22reviews1rating5.00
  10. 2026-09-28reviews1rating5.00
  11. 2026-10-08reviews1rating5.00
  12. 2026-10-09reviews1rating5.00
  13. 2026-10-10reviews1rating5.00
  14. 2026-10-13reviews1rating5.00
  15. 2026-10-18reviews1rating5.00
  16. 2026-10-19reviews1rating5.00
  17. 2026-10-20reviews1rating5.00
  18. 2026-10-21reviews1rating5.00
  19. 2026-10-22reviews1rating5.00
  20. 2026-10-24reviews1rating5.00
  21. 2026-10-25reviews1rating5.00
  22. 2026-10-28reviews1rating5.00
  23. 2026-11-01reviews1rating5.00

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.

  • Run its own code on the pages it can access scripting
  • Act on the current tab, but only after you click it activeTab

The full permission history for this extension

What changed recently

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

The publisher

Tanner Klipstein.

Like this one

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

  1. PowerSchool Grade Calculator Describes nearly the same job, smaller audience 44 users ★ 5.0
  2. ManageBac Grade Calculator Describes nearly the same job, smaller audience 644 users ★ 5.0
  3. UGA Grade Calculator Describes nearly the same job, smaller audience 6 users (last published figure)
  4. A+ Buddy Describes nearly the same job, smaller audience 7 users ★ 5.0
  5. Gradescope Grade Calculator Describes nearly the same job, smaller audience 480 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.

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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 2026-11-01. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built