Frequently Asked Questions
Twelve of the questions readers ask most often, about PiPi Worlds and how it operates. If your question isn't here, the contact page reaches the operator directly.
What is PiPi Worlds?
PiPi Worlds (pipi-worlds.com) is a collection of eight calm, browser-only tools and over 200 long-form guides for three markets — Korean, Japanese, and English. Topics include age math, interest, BMI, pregnancy week, dog breed compatibility, and more. The site is operated by PiFl Labs, an independent studio based in South Korea.
How accurate are the calculators?
Every formula cites a primary source and is backed by unit tests. BMI uses the WHO standard or the WHO 2004 Asian cutoff (with the choice cited in the body). BMR uses Mifflin-St Jeor (1990). Pregnancy due date uses Naegele's rule with your choice of LMP, IVF transfer, or ultrasound base date. That said, please don't make medical, legal, or financial decisions based on this site alone — consult a qualified professional. Disclaimers appear at the foot of each tool guide and in the Terms of Service.
How are my inputs handled? Are they sent to your server?
No. Every tool runs entirely in JavaScript inside your browser. Your inputs are never sent to our server, an analytics service, or a third-party API. If you create a share URL, the inputs travel in the query string to whoever you send it to — but the inputs still never touch our servers. See the Privacy Policy for the full breakdown.
Where do ads appear?
The site is funded by Google AdSense. Ads appear in positions that don't break body readability, and we don't ship pages where ads outweigh content. AdSense may set cookies based on your browsing history; you can disable personalized ads at Google Ad Settings.
Is this content AI-generated?
No. AI tools assist with first drafts, copy editing, and translation-quality checks. Fact verification and per-market tone calls are made by the PiFl Labs editorial team. Every number, law, and year in the body is checked against a primary source (.gov, .gov.uk, .go.kr, .go.jp, peer-reviewed journal, professional society). Claims that fail verification are removed rather than hedged. The full editorial pipeline is described on the About page.
The same article exists in Korean, Japanese, and English. Is that machine translation?
No. We don't translate; we re-write. The Korean draft cites Korean sources (KSSO, KDCA, Korean medical societies). The Japanese draft cites Japanese sources (厚生労働省, 日本産科婦人科学会). The English draft cites American sources (CDC, ACOG, FDA, IRS). Examples, tone, and citations are all different per market. Cross-market citations — e.g., quoting a Korean government domain in an English article — are caught by our quality gate before publication.
I'd like to suggest a new tool or topic.
Please do — email support@pifl-labs.com or use the contact page. Topics with search demand across Korean, Japanese, and English markets — and where the right answer differs by market — get priority.
I found an error or typo.
Calculator bugs, factual errors, typos, broken links — all welcome. Please include the page URL if you can. Replies usually go out within one to three business days, and factual corrections get priority.
Can I quote or translate the articles?
Short excerpts with attribution (URL or site name) are fine. Reproducing whole articles or large blocks of text without permission isn't allowed. For commercial translation or republication, please email first. The tool source code is built for this site's operation and isn't separately licensed.
How does the site handle mobile, dark mode, and accessibility?
Every tool and article is designed mobile-first with dark mode as the default. Keyboard navigation, screen-reader-friendly semantic markup, and visible focus rings are all supported. If you spot an accessibility issue, please email it in.
Is this site trustworthy?
PiPi Worlds is operated by PiFl Labs, an independent studio. Operating details are public on the About page, and every factual claim cites a primary source in the body. A small in-house team keeps the editorial voice consistent and reply times short (one to three business days). For medical, legal, or financial decisions, please consult a qualified professional — this site is for education and reference. All inquiries go to support@pifl-labs.com.
Why is it called PiPi Worlds?
It's named after the PiFl Labs mascot — a calm, curious cyberpunk parrot called PiPi. The mascot appears on every tool and article to keep the visual tone consistent.