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CrystalMath

Chrome Web Store listing by robertjasonperez

A Chrome extension with 14 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 3 screenshots

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

Users
14
Rating
3.7 (3 ratings)
Users, last 30 days
+1
Rating, last 30 days
Steady over 30 days
Version
1.0
Updated in the store
2014-01-24
Published
2014-01-24
Manifest
V2
Browser access
1 permission

How it has moved

Users
+1 since 01.10
10-16 · 12 readings
  1. 2026-10-0815
  2. 2026-10-0916
  3. 2026-10-1015
  4. 2026-10-1614
  5. 2026-10-2113
  6. 2026-10-2212
  7. 2026-10-2413
  8. 2026-10-2511
  9. 2026-10-2610
  10. 2026-10-2812
  11. 2026-10-3014
  12. 2026-10-3114
Rating
unchanged since 01.10
reviewsrating 3.67 · 12 readings
  1. 2026-10-08reviews3rating3.67
  2. 2026-10-09reviews3rating3.67
  3. 2026-10-10reviews3rating3.67
  4. 2026-10-16reviews3rating3.67
  5. 2026-10-21reviews3rating3.67
  6. 2026-10-22reviews3rating3.67
  7. 2026-10-24reviews3rating3.67
  8. 2026-10-25reviews3rating3.67
  9. 2026-10-26reviews3rating3.67
  10. 2026-10-28reviews3rating3.67
  11. 2026-10-30reviews3rating3.67
  12. 2026-10-31reviews3rating3.67
Users
-1 since 01.09
10-16 · 20 readings
  1. 2026-09-0115
  2. 2026-09-0215
  3. 2026-09-0513
  4. 2026-09-0913
  5. 2026-09-1010
  6. 2026-09-1314
  7. 2026-09-1712
  8. 2026-09-2113
  9. 2026-10-0815
  10. 2026-10-0916
  11. 2026-10-1015
  12. 2026-10-1614
  13. 2026-10-2113
  14. 2026-10-2212
  15. 2026-10-2413
  16. 2026-10-2511
  17. 2026-10-2610
  18. 2026-10-2812
  19. 2026-10-3014
  20. 2026-10-3114
Rating
unchanged since 01.09
reviewsrating 3.67 · 20 readings
  1. 2026-09-01reviews3rating3.67
  2. 2026-09-02reviews3rating3.67
  3. 2026-09-05reviews3rating3.67
  4. 2026-09-09reviews3rating3.67
  5. 2026-09-10reviews3rating3.67
  6. 2026-09-13reviews3rating3.67
  7. 2026-09-17reviews3rating3.67
  8. 2026-09-21reviews3rating3.67
  9. 2026-10-08reviews3rating3.67
  10. 2026-10-09reviews3rating3.67
  11. 2026-10-10reviews3rating3.67
  12. 2026-10-16reviews3rating3.67
  13. 2026-10-21reviews3rating3.67
  14. 2026-10-22reviews3rating3.67
  15. 2026-10-24reviews3rating3.67
  16. 2026-10-25reviews3rating3.67
  17. 2026-10-26reviews3rating3.67
  18. 2026-10-28reviews3rating3.67
  19. 2026-10-30reviews3rating3.67
  20. 2026-10-31reviews3rating3.67

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.

The full permission history for this extension

What changed recently

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

The publisher

robertjasonperez.

Like this one

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

  1. Math Booster Describes nearly the same job, smaller audience 3 users (last published figure)
  2. Prodigy Math Describes nearly the same job audience not published ★ 1.0
  3. Math Game Describes nearly the same job, smaller audience 9 users
  4. Math for Brain Describes nearly the same job, smaller audience 18 users ★ 5.0
  5. Maths Quiz App Describes nearly the same job, smaller audience 19 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

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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