SISOI: Woodworking Lab is the bench-side calculator for furniture makers: board feet, seasonal wood movement, joinery geometry and your lumber stash, all in one app with zero permissions.
Explore the labGet in touchPredict seasonal board movement and dimensional change across tangential and radial grain for a range of timber species.
Model mortise and tenon proportions, dovetail layouts and panel glue-up clearances with precise numbers.
Turn linear measurements into board feet, factor in saw kerf waste and estimate total project material cost.
Log your lumber stash, species densities and moisture levels, stored locally on your device.
Works in the garage, the barn, the basement. Everything runs offline with native local storage and needs zero device permissions.
🪵 We are a small crew of woodworkers and developers who got tired of scribbling board-foot math on scrap offcuts and guessing how much a tabletop would move by February.
📐 Our mission is simple: put workshop-grade calculation in your pocket, so every cut, joint and purchase is planned with confidence before the saw spins.
🛠️ SISOI: Woodworking Lab gives you shrinkage forecasts, joinery geometry, lumber estimates and a tidy stock log, all working offline with no sign-ups or paywalls.
🌲 The value is fewer wasted boards, fewer cracked panels and more time making things that last.
Measure true. Cut once. Build for generations.
SISOI: Woodworking Lab is designed to work entirely on your device. We do not collect, store or transmit your data. This policy explains what that means in practice.
None. The app does not collect personal information, usage data, device identifiers, location or any other data. It requires no device permissions.
Because we hold no information about you, we do not use it, analyze it, profile you or sell anything. The measurements, species and costs you enter are used only to produce on-screen results.
Your Wood Vault entries, inventory notes, moisture readings and calculator settings are stored only in local storage on your device. There is no cloud, no server and no backup copy on our side.
The app contains no analytics, advertising networks, social plug-ins or trackers, and it does not share data with third parties. It operates fully offline.
Since nothing leaves your device, there is nothing to intercept in transit or breach on a server. Your data is protected by your device's own security, such as a passcode and system encryption.
The app does not knowingly collect information from anyone, including children under 13, which keeps it in line with COPPA principles. It is safe for young makers and shop-class students.
You are in full control. There are no accounts to manage. To erase all data the app has stored, simply delete the app from your device.
If we update this policy, we will revise the effective date above and publish the new version on this page. Our commitment to on-device privacy will not change.
Questions about privacy? Write to privacy@sisoiwoodworkinglabapp.com.
👋 We love hearing from fellow makers. Whether it is a bug, an idea for a new joint or a partnership, drop us a line.
⏱️ We reply within 24–48 hours.