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Helpful Calculators

Chrome Web Store listing by Sean Noble

A Chrome extension with 229 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 4 screenshots

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

Users
229
Rating
1.0 (1 ratings)
Users, last 30 days
-7
Rating, last 30 days
Steady over 30 days
Version
1.6
Updated in the store
2013-01-28
Published
2013-01-28
Manifest
V2
Browser access
No permissions declared

How it has moved

Users
-7 since 06.10
226-236 · 18 readings
  1. 2026-10-08235
  2. 2026-10-09234
  3. 2026-10-11235
  4. 2026-10-16233
  5. 2026-10-17236
  6. 2026-10-18230
  7. 2026-10-19226
  8. 2026-10-20232
  9. 2026-10-21229
  10. 2026-10-22235
  11. 2026-10-24231
  12. 2026-10-25229
  13. 2026-10-26235
  14. 2026-10-29229
  15. 2026-10-30227
  16. 2026-11-01230
  17. 2026-11-04229
  18. 2026-11-05229
Rating
unchanged since 06.10
reviewsrating 1.00 · 18 readings
  1. 2026-10-08reviews1rating1.00
  2. 2026-10-09reviews1rating1.00
  3. 2026-10-11reviews1rating1.00
  4. 2026-10-16reviews1rating1.00
  5. 2026-10-17reviews1rating1.00
  6. 2026-10-18reviews1rating1.00
  7. 2026-10-19reviews1rating1.00
  8. 2026-10-20reviews1rating1.00
  9. 2026-10-21reviews1rating1.00
  10. 2026-10-22reviews1rating1.00
  11. 2026-10-24reviews1rating1.00
  12. 2026-10-25reviews1rating1.00
  13. 2026-10-26reviews1rating1.00
  14. 2026-10-29reviews1rating1.00
  15. 2026-10-30reviews1rating1.00
  16. 2026-11-01reviews1rating1.00
  17. 2026-11-04reviews1rating1.00
  18. 2026-11-05reviews1rating1.00
Users
-23 since 31.08
220-254 · 33 readings
  1. 2026-08-31252
  2. 2026-09-02254
  3. 2026-09-03250
  4. 2026-09-04246
  5. 2026-09-07245
  6. 2026-09-08240
  7. 2026-09-09237
  8. 2026-09-13239
  9. 2026-09-15237
  10. 2026-09-17241
  11. 2026-09-21235
  12. 2026-09-25227
  13. 2026-09-27221
  14. 2026-09-28220
  15. 2026-10-04236
  16. 2026-10-08235
  17. 2026-10-09234
  18. 2026-10-11235
  19. 2026-10-16233
  20. 2026-10-17236
  21. 2026-10-18230
  22. 2026-10-19226
  23. 2026-10-20232
  24. 2026-10-21229
  25. 2026-10-22235
  26. 2026-10-24231
  27. 2026-10-25229
  28. 2026-10-26235
  29. 2026-10-29229
  30. 2026-10-30227
  31. 2026-11-01230
  32. 2026-11-04229
  33. 2026-11-05229
Rating
unchanged since 31.08
reviewsrating 1.00 · 33 readings
  1. 2026-08-31reviews1rating1.00
  2. 2026-09-02reviews1rating1.00
  3. 2026-09-03reviews1rating1.00
  4. 2026-09-04reviews1rating1.00
  5. 2026-09-07reviews1rating1.00
  6. 2026-09-08reviews1rating1.00
  7. 2026-09-09reviews1rating1.00
  8. 2026-09-13reviews1rating1.00
  9. 2026-09-15reviews1rating1.00
  10. 2026-09-17reviews1rating1.00
  11. 2026-09-21reviews1rating1.00
  12. 2026-09-25reviews1rating1.00
  13. 2026-09-27reviews1rating1.00
  14. 2026-09-28reviews1rating1.00
  15. 2026-10-04reviews1rating1.00
  16. 2026-10-08reviews1rating1.00
  17. 2026-10-09reviews1rating1.00
  18. 2026-10-11reviews1rating1.00
  19. 2026-10-16reviews1rating1.00
  20. 2026-10-17reviews1rating1.00
  21. 2026-10-18reviews1rating1.00
  22. 2026-10-19reviews1rating1.00
  23. 2026-10-20reviews1rating1.00
  24. 2026-10-21reviews1rating1.00
  25. 2026-10-22reviews1rating1.00
  26. 2026-10-24reviews1rating1.00
  27. 2026-10-25reviews1rating1.00
  28. 2026-10-26reviews1rating1.00
  29. 2026-10-29reviews1rating1.00
  30. 2026-10-30reviews1rating1.00
  31. 2026-11-01reviews1rating1.00
  32. 2026-11-04reviews1rating1.00
  33. 2026-11-05reviews1rating1.00

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

Sean Noble publishes 3 listings we track, 1k users between them. Listed website: helpfulcalculators.com.

  1. Scrammed! Sean Noble · published 2012-10-24 489 users ★ 4.7
  2. Five or More Sean Noble · published 2012-02-27 314 users ★ 4.0

Like this one

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

  1. Mortgage Calculator Describes nearly the same job, smaller audience 135 users ★ 2.0
  2. Loan Calculator Describes nearly the same job, smaller audience 16 users ★ 5.0
  3. FinCal Describes nearly the same job, smaller audience 6 users ★ 5.0
  4. Mortgage Calculator by BuildFormulas Describes nearly the same job, smaller audience 10 users
  5. Mortgage Calculator and Mortgage Rate Describes nearly the same job, smaller audience 21 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

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 2026-11-04. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built