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Happy Calculator

Chrome Web Store listing by arthur.koene

A Chrome extension with 79 users, barely installed. Audience over the last 30 days: +7.

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
79
Rating
1.0 (1 ratings)
Users, last 30 days
+7
Rating, last 30 days
Steady over 30 days
Version
1.1
Updated in the store
2015-10-02
Published
2015-06-19
Manifest
V2
Browser access
No permissions declared

How it has moved

Users
+7 since 13.10
65-84 · 15 readings
  1. 2026-10-1676
  2. 2026-10-1778
  3. 2026-10-1881
  4. 2026-10-2184
  5. 2026-10-2278
  6. 2026-10-2373
  7. 2026-10-2565
  8. 2026-10-2869
  9. 2026-10-2972
  10. 2026-10-3079
  11. 2026-11-0184
  12. 2026-11-0475
  13. 2026-11-0676
  14. 2026-11-0778
  15. 2026-11-1179
Rating
unchanged since 13.10
reviewsrating 1.00 · 15 readings
  1. 2026-10-16reviews1rating1.00
  2. 2026-10-17reviews1rating1.00
  3. 2026-10-18reviews1rating1.00
  4. 2026-10-21reviews1rating1.00
  5. 2026-10-22reviews1rating1.00
  6. 2026-10-23reviews1rating1.00
  7. 2026-10-25reviews1rating1.00
  8. 2026-10-28reviews1rating1.00
  9. 2026-10-29reviews1rating1.00
  10. 2026-10-30reviews1rating1.00
  11. 2026-11-01reviews1rating1.00
  12. 2026-11-04reviews1rating1.00
  13. 2026-11-06reviews1rating1.00
  14. 2026-11-07reviews1rating1.00
  15. 2026-11-11reviews1rating1.00
Users
+18 since 01.09
61-84 · 28 readings
  1. 2026-09-0161
  2. 2026-09-0274
  3. 2026-09-0469
  4. 2026-09-1077
  5. 2026-09-1375
  6. 2026-09-1768
  7. 2026-09-2066
  8. 2026-09-2575
  9. 2026-09-2777
  10. 2026-09-2875
  11. 2026-10-0870
  12. 2026-10-0973
  13. 2026-10-1072
  14. 2026-10-1676
  15. 2026-10-1778
  16. 2026-10-1881
  17. 2026-10-2184
  18. 2026-10-2278
  19. 2026-10-2373
  20. 2026-10-2565
  21. 2026-10-2869
  22. 2026-10-2972
  23. 2026-10-3079
  24. 2026-11-0184
  25. 2026-11-0475
  26. 2026-11-0676
  27. 2026-11-0778
  28. 2026-11-1179
Rating
unchanged since 01.09
reviewsrating 1.00 · 28 readings
  1. 2026-09-01reviews1rating1.00
  2. 2026-09-02reviews1rating1.00
  3. 2026-09-04reviews1rating1.00
  4. 2026-09-10reviews1rating1.00
  5. 2026-09-13reviews1rating1.00
  6. 2026-09-17reviews1rating1.00
  7. 2026-09-20reviews1rating1.00
  8. 2026-09-25reviews1rating1.00
  9. 2026-09-27reviews1rating1.00
  10. 2026-09-28reviews1rating1.00
  11. 2026-10-08reviews1rating1.00
  12. 2026-10-09reviews1rating1.00
  13. 2026-10-10reviews1rating1.00
  14. 2026-10-16reviews1rating1.00
  15. 2026-10-17reviews1rating1.00
  16. 2026-10-18reviews1rating1.00
  17. 2026-10-21reviews1rating1.00
  18. 2026-10-22reviews1rating1.00
  19. 2026-10-23reviews1rating1.00
  20. 2026-10-25reviews1rating1.00
  21. 2026-10-28reviews1rating1.00
  22. 2026-10-29reviews1rating1.00
  23. 2026-10-30reviews1rating1.00
  24. 2026-11-01reviews1rating1.00
  25. 2026-11-04reviews1rating1.00
  26. 2026-11-06reviews1rating1.00
  27. 2026-11-07reviews1rating1.00
  28. 2026-11-11reviews1rating1.00

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.

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

arthur.koene publishes 5 listings we track, 229 users between them.

  1. Happy timer arthur.koene · published 2015-07-10 76 users ★ 2.0
  2. Engelse woordenschat - by Lespresso arthur.koene · published 2015-09-07 30 users ★ 5.0
  3. Purple Turtles arthur.koene · published 2020-10-18 29 users ★ 5.0
Show 1 more from this publisher
  1. School Chat Blocker arthur.koene · Make Chrome Yours · Accessibility · published 2022-10-26 15 users

Like this one

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

  1. Teacher Mikes Calculator Describes nearly the same job, smaller audience 18 users
  2. Calculator For Boys Describes nearly the same job, smaller audience 4 users
  3. Wacky Calculator Describes nearly the same job, smaller audience 2 users (last published figure)
  4. Simple Calculator Describes nearly the same job, smaller audience 3 users (last published figure)
  5. Calculator Describes nearly the same job, smaller audience 8 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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Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-11-11. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built