Every plan sees all 118 elements. What changes tier to tier is how fresh the EPS (research-momentum) score is, and how much of the underlying paper/patent data you can get to.
For the general public, students, and casual visitors — explore the live heatmap, no account needed.
For individual researchers, grad students, engineers, and science hobbyists.
Real-time scores and programmatic access for research tooling and internal dashboards.
Strategic intelligence for Fortune 500s, national labs, government agencies, and funds.
EPS (research-momentum score) is a decayed, citation-weighted read on how much the scientific literature is paying attention to an element right now — not just how many papers came out, but how much of that work is actually mattering.
Every plan can browse every element, but the EPS score you see is only as recent as your plan's freshness window. Free/guest views show scores from years back as a demo; Personal narrows that gap to about a year; Professional and Enterprise see real-time, up-to-the-day scores. Nothing is hidden — it's the same score, just time-shifted by tier.
Yes. The Free plan needs no payment and never expires — the full interactive periodic table, all 118 element pages, and the 100-year timeline are open to browse (with the delayed EPS score noted above). No credit card required.
Yes — Personal is a month-to-month subscription with no lock-in. Manage or cancel it any time from your account page, and you'll keep access through the end of the billing period you already paid for.