Privacy Policy

Last updated: June 9, 2026

Overview

Tenon ("the App") is a set of woodworking calculators and a project organizer, published by Evelaina. This policy explains how the App handles your information. In short: Tenon runs on your device and does not collect any personal data.

Data Stored on Your Device

The App keeps the following on your device only. It is never received, seen, or stored by Evelaina:

• Your projects — the calculations you save, their titles, results, and any notes you add.
• Your material lists — the bill-of-materials lines you add to a project.
• Settings — your chosen units (imperial fractions, decimal inches, or metric) and preferences.

iCloud Sync

If you are signed in to iCloud, your saved projects are stored in your own private iCloud account (via Apple's CloudKit) so they can sync across your devices. This data lives in your personal iCloud container and is managed by Apple. Evelaina cannot see, access, or retrieve it. If you are not signed in to iCloud, your projects are stored only on your device.

No Data Sent to Our Servers

Tenon is self-contained. All calculations are performed on your device, and the App does not connect to any Evelaina server or third-party service to function. There is no account to create and no login.

Subscriptions

Tenon offers an optional auto-renewable subscription, "Tenon Pro", that unlocks unlimited saved projects and material-list export. The calculators are always free. Subscriptions are processed entirely by Apple's App Store (StoreKit). Your subscription status is verified on your device through Apple's system; Evelaina does not receive or store your payment information.

Data We Do NOT Collect

• We do not require an account or login.
• We do not collect your name, email address, or contact information.
• We do not collect location data.
• We do not use analytics, tracking pixels, advertising SDKs, or third-party trackers.
• We do not sell or share your data — there is no data leaving our hands to sell or share, because we never receive it.

Apple Privacy Label

For reference, the App's App Store privacy label declares Data Not Collected.

Calculations Are Estimates

Tenon's calculators are designed to be accurate, but results are guidance for planning and purchasing lumber and sheet goods, not a guarantee. Actual wood dimensions, saw kerf, blade width, and cutting accuracy all affect real-world results. Always measure and double-check before cutting. Any building-code checks (such as stair rise and run) are informational only — verify against your local building code. Evelaina is not responsible for materials, costs, or outcomes arising from reliance on a calculation.

Children's Privacy

Tenon is not directed to children under 13, and we do not knowingly collect personal information from children. (Since the App collects no personal information at all, this applies to everyone.)

Data Deletion

Your projects and settings are stored on your device and, if you use iCloud, in your private iCloud account. Deleting the App removes the locally stored data; project data held in your iCloud can be managed or removed from your device's iCloud settings.

Changes to This Policy

We may update this Privacy Policy from time to time. The updated version will be posted at this URL with a revised "Last updated" date.

Contact

If you have questions about this Privacy Policy, contact us at support@evelaina.com.

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