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Flash Cards : Periodic Table of Elements

Chrome extension by Obsidian River Software · Productivity · Workflow

A Chrome extension in Productivity · Workflow with 569 users, barely installed.

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
569
Rating
5.0 (2 ratings)
Users, last 16 days
+22
Rating, last 30 days
Not watched long enough to say
Version
1.6.20
Updated in the store
2025-02-14
Published
2012-09-29
Manifest
V3
Browser access
1 permission

How it has moved

Users
+22 since 01.09
547-575 · 11 readings
  1. 2026-09-01547
  2. 2026-09-02558
  3. 2026-09-04568
  4. 2026-09-05571
  5. 2026-09-06572
  6. 2026-09-07575
  7. 2026-09-08570
  8. 2026-09-09574
  9. 2026-09-13571
  10. 2026-09-15569
  11. 2026-09-16569
Rating
unchanged since 01.09
reviewsrating 5.00 · 11 readings
  1. 2026-09-01reviews2rating5.00
  2. 2026-09-02reviews2rating5.00
  3. 2026-09-04reviews2rating5.00
  4. 2026-09-05reviews2rating5.00
  5. 2026-09-06reviews2rating5.00
  6. 2026-09-07reviews2rating5.00
  7. 2026-09-08reviews2rating5.00
  8. 2026-09-09reviews2rating5.00
  9. 2026-09-13reviews2rating5.00
  10. 2026-09-15reviews2rating5.00
  11. 2026-09-16reviews2rating5.00
Users
+22 since 01.09
547-575 · 11 readings
  1. 2026-09-01547
  2. 2026-09-02558
  3. 2026-09-04568
  4. 2026-09-05571
  5. 2026-09-06572
  6. 2026-09-07575
  7. 2026-09-08570
  8. 2026-09-09574
  9. 2026-09-13571
  10. 2026-09-15569
  11. 2026-09-16569
Rating
unchanged since 01.09
reviewsrating 5.00 · 11 readings
  1. 2026-09-01reviews2rating5.00
  2. 2026-09-02reviews2rating5.00
  3. 2026-09-04reviews2rating5.00
  4. 2026-09-05reviews2rating5.00
  5. 2026-09-06reviews2rating5.00
  6. 2026-09-07reviews2rating5.00
  7. 2026-09-08reviews2rating5.00
  8. 2026-09-09reviews2rating5.00
  9. 2026-09-13reviews2rating5.00
  10. 2026-09-15reviews2rating5.00
  11. 2026-09-16reviews2rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once 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.

  • Sign you in with a Google account identity

The full permission history for this extension

What changed recently

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

The publisher

Obsidian River Software publishes 5 listings we track, 4k users between them. Listed website: coolflashcards.com.

  1. Flash Cards : Division Facts Obsidian River Software · Productivity · Workflow · published 2012-10-13 2k users (last published figure) ★ 1.5
  2. FLASH CARDS : CISSP Certification Obsidian River Software · Productivity · Education · published 2012-09-11 488 users ★ 5.0
  3. PMP Certification Flashcards Obsidian River Software · Productivity · Workflow · published 2012-11-15 326 users ★ 4.0
Show 1 more from this publisher
  1. Basic French Flashcards Obsidian River Software · Productivity · Workflow · published 2012-11-10 145 users ★ 1.0

Like this one

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

  1. Chemistry Flash Cards Describes nearly the same job, smaller audience 261 users ★ 3.4
  2. Flash Cards : Division Facts Describes nearly the same job, smaller audience 2k users (last published figure) ★ 1.5
  3. Find The Symbol Describes nearly the same job, smaller audience 1k users ★ 3.0
  4. Flashcards Describes nearly the same job, smaller audience 9 users ★ 5.0
  5. Periodic Table-Chemistry Tools Describes nearly the same job, smaller audience 8k users (last published figure) ★ 3.8

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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Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.