Privacy policy
Last updated 29 October 2026
The short version. Cellsmith add-ons work inside Google and never send your sheet data to us. We only learn what you choose to tell us: an email you send, a form you fill in, or a purchase you make through Gumroad. We do not sell data, show ads or use tracking cookies.
Who we are
Cellsmith makes spreadsheet templates, free calculators and add-ons for Google Sheets ("Cellsmith", "we", "us"). This policy covers the website cellsmith.org, purchases of Cellsmith products, and the Cellsmith add-ons: Cellsmith Alerts and the Arabic Toolkit. Contact: hello@cellsmith.org.
Cellsmith Alerts (Google Sheets add-on)
Cellsmith Alerts lets you set rules on a Google Sheet, such as "Due date is before today", and emails a digest of the rows that match on a schedule you choose.
What the add-on accesses, and why
| Permission | What it is used for |
|---|---|
See, edit, create and delete only the specific Google Sheets document where the add-on is used spreadsheets.currentonly | Reading the tabs, header row and cell values of that one spreadsheet so your rules can be checked and matching rows can be listed in your digest. The add-on does not change your cells and cannot open any other file in your Drive. |
Send email as you script.send_mail | Sending the digest you set up, and test emails you ask for, from your Google account to you and to recipients you add. Nothing else is ever sent. |
Allow the app to run when you are not present script.scriptapp | Running the check at the days and hour you pick, even when the sheet is closed. |
Connect to an external service script.external_request | Checking a Cellsmith Pro license key with Gumroad, our payment provider. Only the license key and our product ID are sent. No sheet data is sent. |
See your primary Google Account email address userinfo.email | Sending the digest to you by default and keeping your settings separate from other people who use the same sheet. |
Display and run third-party web content in prompts and sidebars inside Google applications script.container.ui | Showing the Cellsmith Alerts sidebar where you create rules and choose your schedule. |
Where your information is kept
Your settings are stored in your own Google account, in the private storage Google provides to Apps Script add-ons. They are not stored by Cellsmith and we cannot see them. They include:
- Your rules: names, the tab and column names they watch, the conditions and any values you type.
- Your schedule, the recipients you add, and a summary of the last check (time, number of matching rows, whether an email was sent).
- If you use the "only new rows" option on Pro: short one-way fingerprints of the rows already reported, so they are not repeated. Fingerprints cannot be turned back into your data.
- If you activate Cellsmith Pro: your license key, the purchase email and plan that Gumroad returns, when the key was last checked, and a short one-way fingerprint of each key you activate, so adding it again later does not use up an activation.
Your sheet data is read by Google's servers only while a check runs. It is not copied into storage, except the rows that appear in a digest email you have asked for.
What Cellsmith receives
Nothing from your sheets. Cellsmith Alerts has no Cellsmith server behind it. When you activate or recheck a Pro key, Gumroad records that the key was checked, which we can see in our Gumroad account along with the purchase details you gave Gumroad at checkout.
Sharing
We do not sell, rent or share Google user data. We do not use it for advertising. We do not use it to develop, improve or train generalized or non-personalized AI or machine learning models. Digests go only to the recipients you set; what they contain is the rows and columns you chose.
Cellsmith Alerts' use and transfer of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements.
Deleting your information
- In the sidebar, choose Delete my data, then This sheet or Everything. Your rules, schedule and stored settings are removed and scheduled checks stop.
- Turning the digest off stops scheduled checks for that sheet.
- You can remove the add-on's access at any time in your Google Account under Third-party apps and services. Delete your data in the sidebar first if you want the stored settings removed too, because we cannot reach them.
Arabic Toolkit (Google Sheets add-on)
The Arabic Toolkit adds formulas such as TAFQEET and HIJRI, and a sidebar that writes amounts in words, converted dates and cleaned Arabic text into the cells you choose.
What the add-on accesses, and why
| Permission | What it is used for |
|---|---|
See, edit, create and delete only the specific Google Sheets document where the add-on is used spreadsheets.currentonly | Reading the cells you select in the sidebar, and writing the results into that spreadsheet when you press a button. Before it replaces anything already in a cell, the sidebar asks you first. The add-on cannot open any other file in your Drive. |
Display and run third-party web content in prompts and sidebars inside Google applications script.container.ui | Showing the Arabic Toolkit sidebar where you pick a tool and preview the result. |
Connect to an external service script.external_request | Checking a Cellsmith Pro license key with Gumroad, our payment provider. Only the license key and our product ID are sent. No sheet data is sent. |
The formulas work only on the values you give them in the formula, like any built-in Google Sheets function.
Where your information is kept
- Nothing from your sheet is stored. Cell values are read by Google's servers only while a tool runs, and the results are written into your own spreadsheet.
- If you activate Cellsmith Pro: your license key, the purchase email and plan that Gumroad returns, when the key was last checked, and a short one-way fingerprint of each key you activate. These are stored in your own Google account, in the private storage Google provides to Apps Script add-ons. Cellsmith cannot see them.
- The sidebar remembers your language and options, such as your currency, in your browser.
What Cellsmith receives
Nothing from your sheets. The Arabic Toolkit has no Cellsmith server behind it. When you activate or recheck a Cellsmith Pro key, Gumroad records that the key was checked, which we can see in our Gumroad account.
Sharing
We do not sell, rent or share Google user data. We do not use it for advertising. We do not use it to develop, improve or train generalized or non-personalized AI or machine learning models.
The Arabic Toolkit's use and transfer of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements.
Deleting your information
- In the sidebar, open Cellsmith Pro and choose Remove key to delete your license key and the details Gumroad returned.
- You can remove the add-on's access at any time in your Google Account under Third-party apps and services.
The website
- Hosting. cellsmith.org is hosted by Netlify, which keeps standard server logs such as IP address, browser and pages requested, used for security and simple traffic counts.
- No tracking cookies. The site sets no cookies of its own and uses no advertising or cross-site trackers. Fonts are served from cellsmith.org.
- Forms. If you send a custom build brief, we receive your name, email and brief. If you join a launch list for an add-on, we receive your email and which add-on it is for. Submissions are stored with Netlify Forms and used only to reply to you or to tell you the add-on is live. You can ask us to delete them at any time.
- Free tools. The calculators, and the amount in words and Hijri tools on cellsmith.org/arabic, run in your browser. What you type into them is not sent to us.
- Email. If you write to us, we keep the conversation in our Google Workspace mailbox to help you.
Purchases
Checkout, payment and receipts are handled by Gumroad. Gumroad shares with us what is needed to deliver and support your purchase, such as your email address, what you bought, the price and your country. We never see your full card details. Gumroad's own privacy policy applies to the checkout.
How long we keep things
Form submissions and emails are kept while they are useful for helping you, and deleted on request. Purchase records are kept as long as needed for tax, accounting and refunds.
Your choices and rights
You can ask us what information we hold about you, ask us to correct it, or ask us to delete it, by emailing hello@cellsmith.org. We reply within 2 working days. Depending on where you live, you may have further rights under laws such as the GDPR, and the right to complain to your local data protection authority.
Children
Cellsmith products are made for adults and businesses and are not directed at children under 16.
Changes
If this policy changes, we will update this page and the date at the top. If a change affects how a Cellsmith add-on uses Google user data, we will say so in that add-on before it applies.