Frequently Asked Questions
Everything you need to know about our tools, privacy policy, and accuracy.
Are these tools really free?
Yes, 100% free. No hidden fees, no subscriptions, no account needed.
Do you store my data?
No. All calculations happen in your browser – we never send your inputs to any server.
Can I use these tools on mobile?
Absolutely. The layout is fully responsive and works on phones, tablets, and desktops.
How accurate is the calorie calculator?
It uses the Mifflin‑St Jeor equation, which is considered one of the most reliable for BMR estimation.
What formula is used for ideal weight?
We use the Devine formula (1974), still widely used in clinical settings.
Can the QR code store more than just contact?
This specific tool generates a vCard (name, mobile, email, address). For other QR types, we may add more tools later.
Is the password generator really secure?
Yes, it uses your browser's built-in random generator. Combine upper, lower, numbers and symbols for strong passwords.
What does "vCard 3.0" mean?
It's a standard file format for electronic business cards. Most phones can scan the QR and add the contact directly.
Do you include ads or tracking?
We use no tracking scripts and only a minimal cookie consent for legal compliance. No intrusive ads.
How can I suggest a new tool?
We'd love to hear! reach out via social media or our contact page.