Plain-language summary
The downloadable offline editions keep chart data on your device or in files you choose. In the online edition, browser-only charts can be used without an account. Signing in enables cloud saving and sharing. Cloud data is processed on behalf of Nithilan Vivek, the app's operator, using Supabase. We do not sell account or chart information or use it for advertising.
Chart information and storage
The app processes chart names, tooth and gum-space annotations, status flags, notes, and edit history. Offline editions store this information locally. The online edition keeps charts and backups in your browser; cloud charts also store this information, ownership, sharing settings, revision numbers, and creation, update, and last-viewed times on the server.
You can import or export JSON files and choose a local backup file. File access is limited to files or folders you select and permit. Browser storage may remember that file permission. Clearing site data removes browser charts, backups, saved sessions, and remembered file connections; exported files remain until you delete them.
Sign-in and account information
Email sign-in uses a one-time code rather than an app password. Supabase processes your email address, account identifier, verification and session information to authenticate you and protect access to your charts. Your browser stores session tokens so you can remain signed in. If you choose Google or Zoom sign-in, that provider supplies the account identity and profile information authorized during sign-in; its own privacy policy also applies. Accounts previously used with GitLab may retain that linked identity.
Account information is used for sign-in, cloud ownership, sharing permissions, account changes, and service emails. Signing out ends the session in that browser; it does not delete cloud charts or local backups. On a shared device, clear site data when you also want to remove cached charts.
Cloud saving and sharing
Cloud charts are private unless their owner changes sharing settings. Owners can grant named email addresses or eligible email domains access, or allow anyone with the link to view or edit. Where enabled by the owner, link editing can work without sign-in. Anyone who receives a permitted link may be able to access the chart or pass that link to others.
The service stores collaborator emails, roles, access requests, and sharing rules. Chart owners can see requesters' email addresses and review requests. People with access can see chart content according to their role and may create copies or export it. Removing access or deleting the original does not remove copies already made by other people.
Service providers and emails
Supabase provides account authentication and cloud storage. Resend delivers service emails, including sign-in codes, account confirmations, access notifications, and inactivity warnings. Emails can contain your address, verification links or codes, a chart link, and an access role; access-request emails to an owner also identify the requester. Chart notes and annotations are not included in those emails.
The website is hosted by Vercel. Hosting, authentication, and email providers may process technical information such as IP addresses, request times, browser details, and delivery or security logs to operate their services. Processing may occur outside your country. The operator can access server-side information to maintain the service and respond to support requests.
Retention and deletion
Local charts remain until you remove them or clear app or browser data. In the online edition, deleting a cloud chart removes it from your library and makes its existing link read-only for 30 days so collaborators can make a copy. After that period, the chart and its history are permanently removed from the active service.
A cloud chart not viewed for 12 months is eligible for an inactivity email to its owner. Once the email service accepts the warning, there is a further four-week period before deletion. Opening the chart with permitted access cancels that pending deletion. Delivery or scheduling delays can extend this period.
To delete your account, open your account menu, choose Delete account, and confirm your email address. This removes your account and the cloud charts you own, including their history and sharing links, and clears that account's saved browser library. This account-deletion action does not use the chart's 30-day copy period. Charts owned by others and local JSON files remain. Copies, provider backups, and operational logs are separate from the active service and may persist under the providers' retention practices.
Website visits and analytics
The offline app editions contain no advertising or analytics SDK. The chart workspace does not send chart contents to an analytics service. Other nithi.land pages, including this policy and the download pages, use Vercel Web Analytics for website traffic statistics. Download pages also count downloads by app and package. These website services are separate from chart storage.
Website pages may load fonts or store badges from their providers, which receive the network requests needed to display them. App stores, operating systems, and external sign-in providers have their own privacy practices.
Your choices and privacy questions
You can use local charting without sign-in, change your account email, export charts, adjust sharing if you own a chart, and delete charts or your account. Only enter or share information you are entitled to use, including information about another person. For questions or help accessing, correcting, or deleting information, contact Nithilan Vivek. If a child has supplied account or chart information, a parent or guardian can use the same contact route for help removing it.
Policy changes
This page will be updated when the app's data practices change, with the update date shown above.