Crucible Privacy Policy

Last updated: April 16, 2026

Overview

Crucible is a powerlifting training app developed by Crucible Labs LLC. Your privacy is simple: your data stays on your device, and we collect as little as possible.

Data Stored on Your Device

All training data (blocks, exercises, logged sets, and progress) is stored locally on your device using Apple's SwiftData framework. This data is not transmitted to any server unless you explicitly use the import feature described below.

Spreadsheet Import & AI Processing

When you import a training spreadsheet, the app may send the spreadsheet's structural data (headers, row layout, exercise names, sets, reps, and load prescriptions) to Anthropic's API for normalization. This data contains your training program and may include your name or other details if your coach included them in the spreadsheet.

Imports using Blacksmith templates (Crucible's native format) are processed entirely on your device. No data is sent to any external service.

For all other imports, Anthropic's API is called each time you import a spreadsheet. No spreadsheet data is cached or reused between imports.

Purchases

In-app purchases are handled entirely by Apple through StoreKit. Crucible does not collect, process, or store any payment information.

Analytics & Tracking

Crucible does not use any analytics frameworks, advertising SDKs, or tracking tools. No usage data is collected or transmitted.

Third-Party Services

Data Export

You can export your training data as a CSV file using the in-app export feature. Exported files are generated locally and shared via the iOS share sheet. They are not uploaded to any server by the app.

Children's Privacy

Crucible is not directed at children under 13 and does not knowingly collect data from children.

Changes to This Policy

If this policy changes, the updated version will be posted at this URL with a revised date.

Contact

Questions? Reach out at hello@cruciblelabs.app