Last updated: October 5, 2026
These terms apply to your use of Useful Tools (useful-tools.app). By using the site you accept them. If you do not agree, please do not use the site.
Use of the tools
The tools are free for personal and commercial use. You may not use the site to break the law, attempt to disrupt it, or scrape it automatically at a volume that harms other visitors.
Accuracy
We work hard to make every result correct, but results are provided as-is without any warranty. Currency rates are reference rates and may differ from what your bank or card provider charges. Always double-check important figures before relying on them.
Financial calculator disclaimer
The compound interest, annuity, mortgage, NPV and IRR calculators are for education and general information only. They are not financial, investment, tax or legal advice. Real loans and investments involve fees, taxes and terms the calculators do not model. Speak to a qualified professional before making financial decisions.
Limitation of liability
To the fullest extent allowed by law, Useful Tools is not liable for any loss or damage arising from use of, or reliance on, the site or its results.
Third-party content
The site shows ads and links to other websites. We are not responsible for their content or practices.
Changes and contact
We may update these terms at any time. Questions? Visit our contact page.