Privacy Policy - Axle Weight: Bridge Formula

Last Updated: November 8, 2026

Overview

Axle Weight: Bridge Formula ("the App") is an axle weight, federal Bridge Formula and tandem slide calculator for truck drivers, published by WittyApps. This policy explains what information the App handles, what stays on your device, and what is shared with service providers. The App works offline and requires no account and no sign-in. The App contains no advertising.

The App is a planning aid only. Certified scale tickets, posted limits, permits and enforcement officers remain the authority on whether a vehicle is legal.

Information We Collect

Stored only on your device (never uploaded):

• Your saved rigs, axle configurations, weigh entries and weigh history.
• Your settings, including any custom state limits you enter, and your Pro subscription status.

Collected automatically (sent to service providers):

• Crash and error reports (via Sentry): technical information such as device model, operating system version, app version and the state of the App when an error occurred.
• Anonymous usage analytics (via Amplitude): which features are used (for example, opening the Bridge Formula check or exporting a CSV). These events are not linked to your identity and contain no weights, axle spacings, rig details or other values you enter.

We do not collect your name, email address, phone number, contacts, photos, location, or the contents of your weigh history.

How We Use Information

• Crash reports: to find and fix bugs.
• Anonymous analytics: to understand which features matter and improve the App.

We do not sell or share your personal information, and we do not use it for advertising or tracking.

Data Storage

Your rigs, weigh history and settings are stored locally on your device only. Deleting the App deletes this data. We operate no servers and hold no copy of your data. CSV files you export are created on your device and shared only where you choose to send them. If you use your device's own backup features, your data is handled under your device platform's terms.

Third-Party Services