This Privacy Policy applies to the Stair Calculator app (the “Application”) developed by Phan Nhat Dang (“Service Provider”). The Application is provided as-is.
The Application does not collect, store, or transmit any personal data.
All information you enter, such as stair dimensions, rise, run, angle, step count, or calculation results, is processed directly on your device and remains stored locally.
The Application does not send your data to any server.
The Application does not use any analytics services, tracking tools, or advertising networks.
No usage data, device data, or identifiers are collected.
The Application may offer in-app purchases or subscriptions. All payments and transactions are processed securely through Apple.
The Service Provider does not collect or store your payment information.
Some content within the Application, such as text, illustrations, icons, or language refinement, may be created or assisted by artificial intelligence during the development process.
AI is used solely to support content creation and does not provide engineering, architectural, construction, or safety advice.
The Application is a stair calculation and planning tool designed for informational and educational purposes only.
All results generated by the Application are estimates based on the inputs provided and general calculation models.
The Application does not provide engineering, architectural, construction, or safety advice.
The results should not be relied upon as a substitute for professional review, local building requirements, or safety standards.
Actual stair dimensions, structural requirements, and construction conditions may vary depending on materials, building methods, and local regulations.
Users are responsible for verifying all measurements, calculations, and construction plans before real-world use or construction.
The Service Provider is not responsible for any construction errors, safety issues, damages, or losses resulting from the use of the Application.
All data remains stored locally on your device. No external data transmission occurs.
The Application does not knowingly collect any data from children under the age of 13.
This Privacy Policy may be updated from time to time. Updates will be posted on this page.
Effective Date: 2026-05-23
Contact: phannhatd@gmail.com