---
title: "Mental Calculation Game – Chrome extension stats, history and permissions"
description: "7 users, no ratings yet. Version 1.1, updated 2025-03-06. Requests 1 permission."
url: "https://extensiontracker.com/extension/hefkgoblocmolpjdopdlkamcmbhlionl"
---

# Mental Calculation Game

Live in the Chrome Web Store.

- Users: 7
- Rating: no ratings yet
- Last checked: 2026-09-27 02:17 UTC
- Users gained in 7 days: – (needs a week of history)
- Users gained in 30 days: – (needs a month of history)
- Rank by users: #175,436 of 264,704 live extensions
- Rank in Games: #5,602 of 6,907

## The listing

What the Chrome Web Store shows, as of the last check.

Summary from the listing:

> A fun mental math game to improve your calculation skills. Choose between basic and advanced modes with adjustable difficulty

- Extension ID: `hefkgoblocmolpjdopdlkamcmbhlionl`
- Developer: [pedrosarkisverani](https://extensiontracker.com/developer/ua1302dd2e7a46fab16e60433efd2a9ed)
- Trader status: Not declared a trader under EU law
- Category: [Lifestyle › Games](https://extensiontracker.com/category/lifestyle/games)
- First published: 2024-10-19
- Last updated: 2025-03-06
- Version: `1.1`
- Size: 755 KiB
- Minimum Chrome: 88
- Languages (1): English
- Chrome Web Store: <https://chromewebstore.google.com/detail/mental-calculation-game/hefkgoblocmolpjdopdlkamcmbhlionl>
- View the code or download the CRX, in CRX Viewer: <https://robwu.nl/crxviewer/?crx=https%3A%2F%2Fchromewebstore.google.com%2Fdetail%2Fhefkgoblocmolpjdopdlkamcmbhlionl>

## Users over time

One row per check, newest first, as shown on the Chrome Web Store.

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-09-27 | 7 | – | – |

## What changed

Every change found on a check, newest first.

No changes found since tracking began on 2026-09-27.

## What it can access

From the extension's manifest, in plain language.

### Browser features

- `storage`: Save settings and data in your browser

## More from this developer

Other extensions from the same publisher account.

| Extension | Users | Rating | Ratings | Category |
| --- | ---: | ---: | ---: | --- |
| [Whatsapp Plus](https://extensiontracker.com/extension/endmmacdmacjnonhdkkbgkhofmhigamg) | 1,000 | 4.75 | 167 | Tools |
| [10FastFingers Automator](https://extensiontracker.com/extension/aogocdkbenongheofkgpommdeedllddd) | 712 | 4.38 | 8 | Entertainment |
| [Stonegy Hunt Automation](https://extensiontracker.com/extension/gjmhldcdmljegohjmppmlfmflpclfpod) | 23 | 5.00 | 1 | Games |
| [eProc Consulta Helper](https://extensiontracker.com/extension/mdkldnlgbjlmnaejlihabchgiejlmokf) | 20 | – | – | Tools |
| [Identificador de batidas ímpares no Ponto Mais](https://extensiontracker.com/extension/bcagjhgafhdljhjdcdhfnlccmieiemgf) | 5 | – | – | Tools |
| [Extensao - Gladiatus](https://extensiontracker.com/extension/fimgfajhehmcehackcealkmjgdnbpgim) | 3 | – | – | Games |

All 7 extensions by [pedrosarkisverani](https://extensiontracker.com/developer/ua1302dd2e7a46fab16e60433efd2a9ed).

## About this data

Collected from the extension's public Chrome Web Store listing. It's checked every month, and again whenever a new version appears. Last checked 2026-09-27 02:17 UTC; next check around 2026-10-15.

How the data is collected: <https://extensiontracker.com/methodology>.

## Cite this page

Extension Tracker. “Mental Calculation Game” (hefkgoblocmolpjdopdlkamcmbhlionl). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/hefkgoblocmolpjdopdlkamcmbhlionl. Accessed 2026-09-28.

```bibtex
@misc{extensiontracker_hefkgoblocmolpjdopdlkamcmbhlionl,
  title   = {Mental Calculation Game (hefkgoblocmolpjdopdlkamcmbhlionl)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/hefkgoblocmolpjdopdlkamcmbhlionl},
  urldate = {2026-09-28}
}
```

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/extension/hefkgoblocmolpjdopdlkamcmbhlionl>. It isn't affiliated with Google. The data is free to reuse under CC BY 4.0 (<https://creativecommons.org/licenses/by/4.0/>), crediting Extension Tracker. Extension, developer and list pages come as Markdown too: add `format=md` to the address, as in `https://extensiontracker.com/extension/{id}?format=md`.