A record you keep
Not: A diagnosis
Flowy stores what you choose to log and makes your own patterns easier to see and to describe to a clinician. It cannot tell you what is causing them.
About Flowy
A small, independent app — and no mystery about who is behind it.
Flowy is a period and cycle tracker for iPhone, built in Vienna by one person. This page says who that is, how the 28 guides and 7 calculators on this site are written, and — just as importantly — what none of it can do for you.
Who builds Flowy
Rohit Gupta
Founder, Flowy · Vienna, Austria
Rohit Gupta is the founder of Flowy, a period and cycle tracking app for iPhone built in Vienna. He designs and writes the product, the free calculators on this site, and the guides in the Flowy journal.
He is a software engineer, not a doctor, midwife, or nurse. Nothing he writes here is drawn from clinical practice or personal medical expertise. Every guide is assembled from public guidance published by organisations such as the NHS, the American College of Obstetricians and Gynecologists, the U.S. Office on Women’s Health, the CDC, NICE, and the WHO, and each one lists the sources it was built from so you can read them yourself.
- Builds the productFounder and developer of Flowy, a period and cycle tracker for iPhone, released on the App Store and built in Vienna.
- Not a medical professionalNo clinical training, licence, or practice. Nothing on this site is written from personal medical expertise, and none of it is medical advice.
- Writes from named sourcesEvery guide is built from public guidance by bodies such as the NHS, ACOG, the U.S. Office on Women’s Health, the CDC, NICE, and the WHO, and links each source it used.
- Says where tracking stopsGuides are written to mark the limits of what a tracker or a calculator can tell you, and to point to a healthcare professional when that limit is reached.
Editorial policy
How we write and check this
Period and cycle health is the kind of subject where being confidently wrong does real damage. So the rules for what goes on this site are narrow, and stated here rather than left for you to guess.
Every guide names its sources
Each article ends with the specific pages it was built from, linked so you can read the original. If a claim is not in one of those sources, it does not belong in the guide.
No clinician has reviewed this content
Flowy has no doctor, midwife, or nurse on staff, and no contracted medical reviewer. Every article says so above the first paragraph. When that changes, the reviewer will be named with their credentials and the date they reviewed the page, and not before.
We do not diagnose, and we say so
Guides explain what published guidance says and what a tracker can reasonably show you. They do not interpret your symptoms, confirm ovulation or pregnancy, or tell you to start or stop a medicine. Most end with the point at which you should talk to a healthcare professional instead.
Estimates are labelled as estimates
Calculators and predictions are built on cycle averages, which move. We show the method, name its limits, and never present an estimate as confirmation. Flowy is not contraception.
Corrections are welcome and get made
If something here is wrong, unclear, or out of date, email it in and it gets fixed. Substantive changes are stamped with an updated date on the article.
Where the content comes from
The guidance we build on
These are the bodies cited across the journal and the calculator method notes. Each article links the specific pages it used, with the date they were last checked.
- NHSUK national health guidance on periods, conditions, and contraception.
- ACOGAmerican College of Obstetricians and Gynecologists patient guidance.
- Office on Women’s Healthwomenshealth.gov, part of the U.S. Department of Health and Human Services.
- CDCU.S. Centers for Disease Control and Prevention.
- NICEUK National Institute for Health and Care Excellence.
- WHOWorld Health Organization.
- ASRMAmerican Society for Reproductive Medicine.
- FDAU.S. Food and Drug Administration, for test and device guidance.
Scope
What Flowy is, and what it is not
An estimate with its limits shown
Not: Contraception or a fertility test
Cycle and fertile-window estimates come from your own history. They cannot confirm ovulation, prevent pregnancy, or replace a pregnancy test.
Private by default
Not: An advertising product
Flowy does not sell personal or health data or build an advertising profile from a cycle history. Calculator inputs on this site stay in your browser, and the app ships export, reset, and delete controls.
Corrections and questions
Tell us when we get it wrong.
Spotted a claim that does not match its source, a guide that has aged badly, or wording that could mislead someone? That is the most useful message you can send.
For urgent medical concerns, contact a qualified healthcare professional or your local emergency service. Flowy cannot help with those.