Contact us

Found outdated data? Have a feature request? Spotted a bug? We read every message and respond within 7 days.

What we'd love to hear about

We're a small team and we genuinely use every piece of feedback to improve the site. Here's what's most useful to us:

Caffeine data correction

Spotted an outdated caffeine value? Brand reformulated? Tell us the beverage, the current value, and the source for the correct one.

Suggest a new tool or guide

Want a calculator for caffeine cost, a guide on caffeine and migraines, or a comparison tool we don't have yet? Suggest it.

Report a bug

Calculator showing the wrong total? Chart not rendering? Send us the page URL, what you did, and what you expected to see.

Medical disclaimer questions

We can't give medical advice, but if you have questions about how our limits apply to your situation, we'll point you to the relevant research.

How to reach us

We don't have a contact form because we don't want to collect your email address. Instead, please reach out via any of these channels:

Contact us
Send us a message through our contact form or reach out via social media. Best for data corrections, partnerships, and press inquiries. Response time: 7 days.
Bug reports
Send us the page URL, what you did, what you expected, and what actually happened. Screenshots help. Response time: 3 days.
Note: We cannot provide medical advice over email. If you have a health question about caffeine and your specific situation, please consult a healthcare professional. See our medical disclaimer for details.

Response times

  • Bug reports: 3 business days
  • Data corrections: 7 days, plus up to 30 days to verify and publish the update
  • Feature requests: 14 days (we read everything, but can't always reply individually)
  • Press / partnerships: 7 days
  • Privacy / data-rights requests (GDPR, CCPA): 30 days, per legal requirements

Before you write

A few common questions we get — please check these before emailing, since the answer is probably already here:

  • "Can you add [specific brand] to the database?" — Yes, send us the brand name, beverage name, serving size, and the caffeine value from the product label or website.
  • "Why does my Starbucks coffee have more caffeine than your calculator says?" — Starbucks publishes its own caffeine chart on starbucks.com. We use generic USDA values for "brewed coffee"; for Starbucks-specific drinks, search the database for the Starbucks item.
  • "Can you add a feature where I save my daily log?" — Saving data requires accounts and servers, which conflicts with our no-tracking privacy stance. We're considering a local-storage-only option for a future release.
  • "Do you have an API?" — Not yet. If there's enough interest, we may publish the caffeine database as a read-only JSON API.