---
title: "Sleep Calculator – Chrome extension stats, history and permissions"
description: "9 users, no ratings yet. Version 1.1, updated 2025-07-25. Requests 0 permissions."
url: "https://extensiontracker.com/extension/ookjangbfjicdhanfbkolekaofjkahki"
---

# Sleep Calculator

Live in the Chrome Web Store.

- Users: 9
- Rating: no ratings yet
- Last checked: 2026-09-27 07:09 UTC
- Users gained in 7 days: – (needs a week of history)
- Users gained in 30 days: – (needs a month of history)
- Rank by users: #159,464 of 264,703 live extensions
- Rank in Tools: #58,745 of 103,498

## The listing

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

Summary from the listing:

> Calculate optimal sleep times to help you get sufficient rest

- Extension ID: `ookjangbfjicdhanfbkolekaofjkahki`
- Developer: [None](https://extensiontracker.com/developer/ua913ebb1e5be978190f1e6fe818aa746)
- Category: [Productivity › Tools](https://extensiontracker.com/category/productivity/tools)
- First published: 2025-06-24
- Last updated: 2025-07-25
- Version: `1.1`
- Size: 14.79 KiB
- Minimum Chrome: 88
- Languages (1): English
- Website: `91toolbox.cn`
- Chrome Web Store: <https://chromewebstore.google.com/detail/sleep-calculator/ookjangbfjicdhanfbkolekaofjkahki>
- View the code or download the CRX, in CRX Viewer: <https://robwu.nl/crxviewer/?crx=https%3A%2F%2Fchromewebstore.google.com%2Fdetail%2Fookjangbfjicdhanfbkolekaofjkahki>

## Users over time

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

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-09-27 | 9 | – | – |

## 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.

It asks for no permissions.

## More from this developer

Other extensions from the same publisher account.

| Extension | Users | Rating | Ratings | Category |
| --- | ---: | ---: | ---: | --- |
| [csdn增强助手](https://extensiontracker.com/extension/fpgaealcfgjbodghojppfmohfcoajled) | 839 | 3.25 | 4 | Developer Tools |
| [URL Redirector](https://extensiontracker.com/extension/fbdommicdaeknlccchdhjkjnbhaacjcp) | 68 | – | – | Workflow & Planning |
| [Temu Finder](https://extensiontracker.com/extension/eajeeafhegknjegcofgjbdggjhopghep) | 63 | 5.00 | 1 | Shopping |
| [Sudoku Puzzle](https://extensiontracker.com/extension/ekpneldigdfmojoaccinpcmcompfhiol) | 19 | – | – | Games |
| [Percentage Calculator](https://extensiontracker.com/extension/jjeheffdhcmfhgblpheecafefjgefgpg) | 18 | 5.00 | 1 | Workflow & Planning |
| [Gemini Quick Search](https://extensiontracker.com/extension/koloapcdkkpgdgabdlnjadaihhbcpbcg) | 17 | – | – | Tools |
| [QR Code Toolbox](https://extensiontracker.com/extension/kjeldflleldedjgacabhcaoheecphkhe) | 14 | – | – | Tools |
| [ChatGPT Quick Search](https://extensiontracker.com/extension/jdkpcacgpigpnbmflahhnnpgojndigoh) | 10 | – | – | Tools |
| [Water Measure Puzzle](https://extensiontracker.com/extension/amkhledlcadfmmikfbjidnefmalmdhhi) | 3 | – | – | Games |

All 10 extensions by [None](https://extensiontracker.com/developer/ua913ebb1e5be978190f1e6fe818aa746).

## 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 07:09 UTC; next check around 2026-10-15.

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

## Cite this page

Extension Tracker. “Sleep Calculator” (ookjangbfjicdhanfbkolekaofjkahki). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/ookjangbfjicdhanfbkolekaofjkahki. Accessed 2026-09-28.

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

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/extension/ookjangbfjicdhanfbkolekaofjkahki>. 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`.