Stringline Support

Last updated: March 23, 2026

Contact Us

For questions, bug reports, or feature requests:

Email: stringline@apexlever.com

We typically respond within 1-2 business days.

Frequently Asked Questions

Does Stringline require an internet connection?

No. Stringline works 100% offline. All calculations, history, and reference materials are stored on your device.

How do I recover my calculation history?

Calculation history is stored locally on your device. If you delete and reinstall the app, history will be lost. We recommend using the PDF export feature to save important calculations.

Which building codes does Stringline support?

Stringline validates against IRC 2021, IRC 2024, and OSHA standards. You can switch between codes in Settings.

How accurate are the calculations?

Stringline uses integer 64ths-of-an-inch arithmetic to eliminate floating-point rounding errors. Every formula is verified against 1,079 automated test cases before release.

Can I export my calculations?

Yes. Every calculator has a PDF export button that generates a printable document with your inputs, results, and step-by-step math.

How do I change the fraction precision?

Go to Settings and select your preferred precision: 1/8", 1/16", 1/32", or 1/64".

Privacy

Stringline collects no data. No accounts, no analytics, no tracking. See our Privacy Policy for details.