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Online Calculator

Chrome extension by JST EXPRESS CORP · Productivity · Tools

A Chrome extension in Productivity · Tools with 13 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 3 screenshots

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

Users
13
Rating
not rated yet
Users, last 12 days
+1
Version
1.0
Updated in the store
2025-10-11
Published
2025-10-11
Manifest
V3
Browser access
1 permission

How it has moved

Users
+1 since 31.08
10-13 · 7 readings
  1. 2026-08-3112
  2. 2026-09-0213
  3. 2026-09-0411
  4. 2026-09-0710
  5. 2026-09-0911
  6. 2026-09-1013
  7. 2026-09-1113
Users
+1 since 31.08
10-13 · 7 readings
  1. 2026-08-3112
  2. 2026-09-0213
  3. 2026-09-0411
  4. 2026-09-0710
  5. 2026-09-0911
  6. 2026-09-1013
  7. 2026-09-1113

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.

  • Store data in your browser storage

The full permission history for this extension

What changed recently

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

The publisher

JST EXPRESS CORP.

Like this one

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

  1. Calculator (iOS Inspired) Describes nearly the same job, smaller audience 46 users
  2. Calculator Describes nearly the same job, smaller audience 83 users ★ 5.0
  3. Basic Calculator Describes nearly the same job, smaller audience 70 users
  4. Calculator App Describes nearly the same job, smaller audience 6 users
  5. Nice Calculator Describes nearly the same job 0 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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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.