Last updated 22 October 2026. These terms are an agreement between you and Metrisi Corporation, a Delaware corporation (“Metrisi”, “we”, “us”), and they cover the Metrisi app and the website at app.metrisi.app. By making an account you agree to them. If you do not agree, do not use Metrisi.
This is not medical advice
Metrisi is a logging and analysis tool. It is not a medical device, it is not a clinician, and nothing in it — no number, chart, limit, note or insight, and nothing another person posts — is a diagnosis, a prescription, or a recommendation to take, stop or change anything.
Talk to your doctor before you change anything you take: before starting, stopping or combining anything, and particularly if you are pregnant or nursing, have a health condition, or take prescription medication. Interactions this app knows nothing about are the ones most likely to hurt you.
If you think you are having a medical emergency, call your local emergency number. Do not consult an app.
What the safety warnings are and are not
The app adds up certain ingredients across everything you logged in a day and compares the total against a published daily limit — amber at 75%, over at 100%. Each limit cites its source, mostly NIH tolerable upper intake levels, plus FDA guidance for caffeine and acetaminophen and the US Dietary Guidelines for alcohol.
Read the limits carefully:
- They are general adult limits. The only personal thing the calculation uses is your sex: for alcohol (the more cautious 1-drink limit unless your profile says male), and for the recommended amounts shown beside some totals.
- It tracks 17 ingredients. Anything else you take is not being summed at all.
- A compound you created counts only for the ingredients you entered. The custom-compound form has a per-unit ingredient field for exactly this reason. Skip it and that product contributes nothing — so a "preworkout" you added without listing its 300mg of caffeine will not appear in your caffeine number.
- It never blocks anything. It warns; you decide; the log goes in either way.
- Not every limit means the same thing. Most are set to avoid real harm and show red when passed. A few — supplemental magnesium and vitamin C — are set by NIH to avoid digestive side effects, so going over shows amber with that reason. Nutrients with no upper limit at all, like vitamin B12, aren't tracked against one.
- Where NIH publishes a recommended amount (RDA), the app shows it too, so you can see "enough" as well as "too much". Your totals come from supplements only, while an RDA counts food as well, so being below it from supplements isn't a shortfall on its own.
A limit that is right for a healthy adult can be wrong for you.
Combination notes. Separately from the limits, the app carries a short list of cited notes about two substances together: which published source addresses the pair, most often an FDA label or an NIH, CDC or NIAAA page, and a few notes that two things are commonly taken or have been studied together. A caution about a pair is shown on the screen where you log a dose when the other one is already in today's log, and beside a planned dose on Home and in Your day when the other one is in today's log or still on today's plan. When the other one is only something you take (logged in the last 14 days and not stopped, or on your plan as a dose to take), the screen where you log names the pair in one line. A one-tap log that skips that screen, such as a reminder's Log it button, shows no note. One caution is the exception: the note about alcohol with coffee is not shown on any of those screens, because most people have both on the same day and a warning that appears most days stops being read. All the notes for a substance are on its page, under About. The notes where both things are ones you take are also listed under You → Cabinet, as Worth watching and Helpful pairings, and nothing is shown there when no note applies. A note that two things are commonly taken or have been studied together counts as yours only when you take those two things themselves, not a medicine that contains one of them. The note about alcohol with coffee, the notes on timing, and the notes that two things are commonly taken or have been studied together are shown in those two places, and not on the screen where you log a dose, on Home or in Your day. They are worked out on your phone, from your log and a list stored in the app, and working them out sends nothing. A note never blocks a log. The list is short. It recognises the substances in the app's built-in list and a handful of FDA-listed medicines, and nothing you typed in yourself or scanned from a label. So a page, a stack or a log with no note has not been checked and found fine.
Amounts. The app does not tell you how much of anything to take. A substance's page states a dose range only when a health authority has set one and the app can say which: the NIH and FDA daily limits and NIH recommended amounts above, each with its source. For an FDA-listed medicine, the directions from its own label are shown on its medicine page, in the label's words (from DailyMed). For everything else the page says that it holds no health-authority figure and shows none, and what other people report taking is never shown as a dose range. When you log something, an amount already filled in is there to save typing, not as advice: your own last log, the serving a product's label states, or a starting serving the app holds for everyday things such as supplements and coffee. You can change it. The first time you log a prescription or a hormone from the app's built-in list, or a built-in whose usual serving alone would pass a limit the app cites, the amount is left empty for you to fill in; after that it starts from your own last logs. A dose on your plan, on Home and in its reminder, carries the amount you set for that plan or one of the amounts above; when there is none, it shows no amount, and logging it asks you for one.
Some substance and medicine pages also show two reference facts, read from lists stored inside the app — looking them up sends nothing anywhere. One is the substance's federal schedule under the Controlled Substances Act (21 CFR Part 1308, from the eCFR); state laws differ. The other is its NIH LiverTox likelihood score, A to E: how strongly published case reports tie that substance to liver injury. Both are matched by name, so a page can miss a substance it should have caught, and a LiverTox score describes the substance in general, not your risk. Neither is legal or medical advice.
Lab tests the app reads are matched to their LOINC codes, the standard identifiers labs and health systems use. This material contains content from LOINC (http://loinc.org). LOINC is copyright © Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license. LOINC® is a registered United States trademark of Regenstrief Institute, Inc.
What the correlations are and are not
Every result the app shows compares your average on days you took something against your average on days you did not, in the last 90 days. That is the entire method.
It cannot rule out that you take magnesium on the nights you were already winding down early, that you started three things in the same week, or that you are simply sleeping better lately for unrelated reasons. Nothing is randomised or blinded, and it is one person's data.
This is why the app says association, not causation everywhere, and why it hides results that do not clear a minimum sample and effect size rather than showing you a weak number.
Who can use Metrisi
You must be 18 or older to use Metrisi. A person under 18 may not use Metrisi or make an account. The sign-up screen asks you to confirm your age, and if we learn that an account belongs to someone under 18, we delete it.
Using Metrisi requires an account, which you make with your email address and an eight-digit code we email you. One account per person. Keep your email account secure: anyone who can read the codes we send to it can sign in as you.
Do not sign up as somebody else, and do not claim a handle in order to be mistaken for someone. Impersonation is one of the things this product is built to make harder, and we will take back a handle used for it.
Your content and the rules for it
What you log is yours, and so is what you publish. By publishing something you give Metrisi permission to store it and show it — on your page, in feeds, in communities, on the pages for the substances you published and in search, to the people your settings allow — for as long as you leave it up. That permission ends when you take it down, apart from the copies the privacy policy lists.
You are responsible for what you post and publish. Metrisi has zero tolerance for objectionable content and abusive users. Do not post, publish or send anything that:
- harasses, threatens, bullies or demeans anyone, or attacks people for who they are;
- is sexually explicit, or violent or graphic;
- exploits or endangers children in any way;
- is hateful, defamatory, or deliberately false or misleading;
- is spam, a scam or advertising;
- impersonates someone, or shares another person's private or medical information;
- gives other people dose instructions, or presents what you take as medical advice;
- breaks the law, or encourages or helps anyone to.
Nothing is bought, sold, given away or supplied through Metrisi, and nothing here may say where to get it. That means no buying, selling or sourcing of anything: no vendors, prices, discount codes, group buys, samples or contact details, and no asking where something came from. Posts, replies and community posts that read that way, carry a link, or name certain restricted substances are refused when you send them, and anything that gets through is removed when it is reported.
Software checks what you post as you send it, but no check catches everything, and you may see something that breaks these rules before it is reported and removed. When you do, report it.
Reports, blocking and enforcement
You can report any post, reply, community post or published entry (press and hold it, or use the ••• menu on an open post) and any person (the ••• menu on their profile), and you can block anyone from the same places. Blocking takes their posts out of what you see at once, and you disappear from each other. Settings → Blocked lists who you blocked.
We review every report within 24 hours. Content that breaks these terms is removed, and the account that posted it can be suspended: until we lift the suspension, that account cannot post or publish, and what it published is hidden from everyone else. We may also act without a report, and we remove content and accounts when the law requires it.
Write to support@metrisi.app about anything on Metrisi that worries you.
Communities and challenges
The communities under Groups are provided by Metrisi, each around a health goal, and anyone signed in can join them. These terms apply to everything posted there, and our moderators remove what breaks them. Challenges reward checking in, connecting Apple Health and adding lab results, never taking anything, and your progress in them is worked out on your phone.
Your account
You can delete your account at any time in the app: Settings → Delete account. Because the app needs an account, deleting it also signs you out and deletes your log backup and everything you published from our servers; what you logged stays on this phone until you delete it there. The privacy policy lists exactly what goes and what is kept.
We may suspend or end an account that breaks these terms or the law, or that puts other people at risk, and remove what it published. We may change Metrisi, or stop offering any part of it. Your own log on your own phone is untouched by anything we do, and Export everything (Settings → Your data) gives you a copy of it whenever you like.
No warranty
Metrisi is provided as is and as available, without warranties of any kind, express or implied, including any warranty of accuracy, merchantability, fitness for a particular purpose or non-infringement. Metrisi Corporation does not warrant that the app, its calculations, its reference information or anything other people post is complete, correct or current, or that the app will run without interruption or error. Do not use it as your only record of anything that matters: export regularly.
To the fullest extent the law allows, Metrisi Corporation is not liable for any indirect, incidental, special, consequential or punitive damages, or for any loss arising from a decision you make about your health, whether or not you used Metrisi in making it. Nothing in these terms limits a right you have that the law does not allow to be limited.
Changes to these terms
If we change these terms, the date at the top of this page changes, and if the change matters we will tell you in the app before it takes effect. Using Metrisi after that means you accept the new terms. Questions about these terms go to support@metrisi.app.