Terms of Use

Effective: August 2, 2026

These terms apply to Unit Converter, Unit Calculator, Tip Calculator, Fraction Calculator, and Sudoku published by Lei Wenbin.

Use of the apps

The apps provide general utility, educational, or entertainment functions. Results may be rounded or affected by entered values and should be independently verified when used for financial, engineering, safety-critical, or other consequential decisions.

Advertising and third-party services

The apps may display a bottom banner advertisement through Google AdMob and use Google User Messaging Platform for privacy choices. Third-party services are governed by their own terms and policies.

Availability and changes

Features may be improved, changed, or discontinued. The apps are provided without a guarantee of uninterrupted or error-free operation, to the maximum extent permitted by law.

Apple terms

Downloads and use through the App Store are also governed by Apple’s applicable terms and the standard Licensed Application End User License Agreement.

Contact

Email enbilex@gmail.com.