Privacy Policy

Lets get to the point. Here is a list of things we dont do:

★ We do NOT show ads.

★ We do NOT store or even transmit any of your personal data to us or a third party.

★ We do NOT store any of your data outside your device except inside Trello itself or your Google spreadsheet when using the "Stealth" or "Legacy" sync modes.

For the mobile and power-up Plus for Trello policy see here for more details.

Permissions for the Chrome extension are configured to the minimum possible. 
When Plus requests more permissions, Chrome will always ask you to accept or deny the permission. Plus requests additional permissions when you use one of the "Google sync" methods.

The initial permissions when you add the extension are:
  • "Read and change you data on", a must so Plus can insert itself inside pages.

Plus may request more extension permissions if you use the "stealth" or "legacy" sync method. See more in the "stealth" and "legacy" section below, which explains each "scope" in detail.

See these permissions by finding Plus in your extensions page:

On Chrome, click its menu top-right.
Select More tools > Extensions
Find "Plus for Trello" and click "Details".
More about Chrome permissions.

How Plus uses and secures your data

Plus can store your Plus data (Spent & estimates) inside or outside Trello.

If you use the "trello comments" sync method, Plus stores its data inside Trello.

If you use the "stealth" or "legacy" sync methods, Plus stores its data on a Google spreadsheet in your Google Drive. In that case, Plus cannot read your spreadsheet outside of your browser extension and cannot read, write or list any other Drive file as it only has permission for that single spreadsheet. Plus can only read and write to the sync spreadsheet you created within the Chrome extension. We use the tightest possible permission as provided by the Google Drive API scopes by using the drive.file scope (per-file access). See more in the "stealth" and "legacy" section below.

Plus reads from API and web pages to insert itself in the right places and sync with Chrome or the mobile app, reads API data from boards you joined, their lists and cards, and writes data to Trello as card comments (and card titles if enabled). These all happens while you have a Trello page open.

If you also enable "background sync", it will read from Trello while Chrome is open, even if you have not opened a Trello tab.

Anonymous, statistical Plus features usage data

Plus uses Google Analytics to receive information about feature usage so we know which are the most and least used features or how many users use the "Pro" version. The data is fully anonymous. We cannot trace it back to a specific Trello user and never send personal information, only how many times users use each feature.

Security of your data

All the Plus data is inside a Chrome local web sql database, chrome storage (local and sync) and localStorage.
Chrome manages web sql with a super-fast and robust sqLite database (a built-in Chrome feature).

Plus provides a "Reset Sync" button in case you ever need to rebuild all the data from scratch. Because S/E is saved inside Trello (or in a Google spreadsheet for those using "Stealth" sync) Plus removes the data Plus saved in your device, followed by a full "sync". This will work even if your hard-disk fails and is replaced by a new one, or if you add Plus to a different computer.

If using "Chrome sign-in" (recommended), Plus preferences and active timers are stored in chrome "sync" storage which makes them available in your other desktop computers where you use Chrome sign-in.

If you are not signed-into Chrome you can still sync your Trello data and S/E in other devices but active running timers or preferences will not sync across devices.

Remove Plus data

If you wish to remove all Plus data from your machine, follow these steps from Plus help:
  1. Under "Sync", select "disabled" sync from the drop-down list.
  2. Under "Utilities", click "Reset sync".

Network usage

During the "first sync" with Trello, Plus will use more bandwidth as it reads all your boards history. A "first sync" with hundreds of boards and many thousands of history entries typically takes under 1 minute.
After that, all further syncs are almost immediate and use almost no bandwidth. The only case when Plus could again take a few seconds to finish sync is when you become a member of a board that has extensive existing card history.

Open Source

The source code is at github for your inspection. You can also inspect the code directly from the chrome debugger, which always has the latest version.

For "stealth" and "legacy" sync users

If you select "Stealth" or "Legacy" sync, Chrome asks you to approve additional permissions for Google spreadsheets. Plus reads and writes to to sync with the Google spreadsheet. Chrome will ask you to approve that Google permission the first time you set it up.

Note that Plus never asks or saves your Google password. Plus uses the latest industry-standard oauth2 protocol built-in in Chrome identity.

Plus also asks additional Google permissions if you click the "create Google spreadsheet" button so it can create the spreadsheet in your Google Drive. Those permissions only give access to the single Google Drive spreadsheet file created by Plus (scope ""). The permission (an oauth2 token, not a password) is remembered by Chrome.identity (not Plus) until you revoke access.
For more details see Authorizing requests to a spreadsheet and Creating a spreadsheet in Drive.

View or revoke your approved Google spreadsheet/drive file permissions under 
"Plus for Trello" in the Google account security page.

Turning on and off the extension

Manage the extension using the Google Chrome extensions help.
You can also turn off just the modification of Trello pages by using the first checkbox in the Plus help pane, "Disable changing pages." In that case, Plus continues to function and sync, just it wont show in trello pages. That option is useful in the very rare case (so far 3 times in 4 years) where Trello makes a change to their pages such that Plus can no longer find its way around. Historically, we have fixed those few issues always within one day.

The Plus for Trello team