Terms of Use

Here is what you agree to when you use Mayfly.

Version: 21 October 2026

1. Who we are and what you agree to

You agree to these Terms when you create an account or use Mayfly.

(a) We are Mayfly Dating, a Delaware corporation, 4516 South Compton Ave, 63111 St. Louis, Missouri. “Mayfly” is the app and the website we run. Our website is at mayflydating.com. You can reach us at privacy@mayflydating.com for privacy requests, and at team@mayflydating.com for everything else.

(b) These Terms include the Privacy Policy, the Community Standards and the Safe Dating Practices. You can find all three in the app’s settings.

(c) We use these words the same way in the Terms of Use and in the Privacy Policy.

2. What Mayfly is

Mayfly gives you a match, and one credit pays for each.

(a) Mayfly assigns you a match. We assign it: there is no feed, no swiping and no choosing. A match lasts one week.

(b) You and your match can chat during the week.

(c) At the end of each week your match ends and we invite you to complete a short survey about it. We save your answers.

(d) We keep a behaviour score for each member, the Pulse Score.

(e) During the beta Mayfly is free. After it, each match costs one credit and women do not pay. Section 5 has the detail.

3. Who can use Mayfly

You need to be old enough, able to agree to these Terms, and in a place where Mayfly is open.

(a) You must be at least 18 to use Mayfly.

(b) If we find that an account belongs to someone under 18, we ban it.

(c) To get a match you must finish onboarding and complete your profile, and be in a location where Mayfly is open.

(d) You must be legally able to enter a contract with us, and the law must not forbid you from using Mayfly.

(e) You may have one account.

(f) You must not be in, or ordinarily live in, a country that is under United States trade sanctions or an embargo, and you must not be on a United States government list of prohibited or restricted parties.

(g) You must not have been convicted of, or pleaded no contest to, a sexual offence, stalking, or a crime of violence or a threat of violence, and you must not be on a sex offender register.

(h) If you stop meeting any of these conditions, we may withdraw your permission to use Mayfly.

4. Your account

Your account is always in one of three states, and it is yours to look after.

(a) You sign in with Apple or with a link we email you.

(b) You pause your account, you deactivate it, or we ban it. Paused and deactivated accounts do not get a match.

(c) You can unpause a paused account at any time (see section 6).

(d) You must follow these Terms and the law, including the law on privacy, intellectual property, spam and exports.

(e) You must keep your sign-in safe, including when you sign in with Apple. Do not let anyone else use your account.

(f) Be who you say you are. Your profile and photos must show you, and what you tell us must be accurate and kept up to date.

(g) Treat other members and our staff with respect. Read the Community Standards and the Safe Dating Practices.

(h) Keep Mayfly up to date. We may ask you to update the app to keep using it.

(i) We may ban an account that breaks these Terms.

5. Beta, credits and payment

Mayfly is in open beta and is free. When the beta ends, you start with six credits and then buy week passes. Women will not pay.

(a) Mayfly is in open beta. During the beta every feature is free and you pay nothing.

(b) When the beta ends, every account starts with six credits, once. They work like credits you buy.

(c) One credit pays for one match. We take a credit from you only in a week in which we give you a match. A week in which you are paused, or in which we give you no match, costs you nothing.

(d) When you have no credits left, you can buy week passes in the app’s settings. Each week pass adds one credit to your account. You can buy 1, 4 or 12 at a time. Credits do not expire.

(e) One week pass will cost €2.49 in Europe and $2.99 in the United States, in US dollars. The price shown in the App Store before you buy is the price that applies.

(f) Mayfly will be free for women, including trans women, who will not need week passes. Men, including trans men, will pay. We will tell you before the beta ends what applies to a member who is neither a man nor a woman.

(g) A week pass is a one-off purchase. It does not renew, so there is nothing to cancel.

(h) Payments go through Apple’s App Store. RevenueCat records purchases for us.

(i) We keep what we receive and do not issue refunds ourselves. Apple handles payment. You can ask Apple for a refund, and Apple decides. If Apple refunds a week pass, we take that credit back. If you live in the EU, the law may give you a right to cancel a purchase within 14 days; we will tell you how it works before you can buy.

6. Pausing, deactivating and cancelling

You can step away from Mayfly at any time, and come back.

(a) You can pause or deactivate your account. A paused or deactivated account gets no match until you come back.

(b) You can pause from the app, and unpause it from the app at any time. A pause can start at any time, and it counts only if it lasts to the end of the week.

(c) You can deactivate from the app, and reactivate at any time.

(d) We spend no credit while you are paused or deactivated, and you keep the credits you have.

(e) If you pause your account, the AI analysis of your chats is paused too. Nothing else happens: we keep your data and your scores.

(f) If you deactivate your account, we freeze your profile until you reactivate and keep your data. To have your data deleted, delete your account.

(g) There is nothing to cancel in Apple’s settings: week passes do not renew (section 5(g)).

7. What we expect from you

Treat other members well, and use Mayfly only for what it is for.

Conduct

You must not:

1. harass, threaten, stalk or intimidate anyone, on or off Mayfly;
2. give false information about who you are, including your age;
3. use another person’s account, or let anyone use yours;
4. share another member’s personal data without their agreement;
5. ask other members for money, gifts or loans;
6. use Mayfly for fraud, scams or spam;
7. damage Mayfly, overload it, interfere with it, probe it for weaknesses, or copy its data by automated means;
8. introduce malware or any code that harms Mayfly or another member’s device.

If you find a weakness in our security, tell us at team@mayflydating.com.

Content

You must not post content that:

1. is illegal, or helps someone break the law;
2. threatens, abuses or targets a person;
3. is sexually explicit, including nudity;
4. states something false that harms another person;
5. advertises or sells something;
6. shows another person without their agreement;
7. contains malware;
8. shows bank, card or payment details, or contact details that are not yours.

Photos

A photo must not contain:

1. nudity;
2. a minor;
3. illicit weapons or substances.

8. Your content

Your content stays yours.

(a) Your content stays yours. You give us the right to store it, show it to your match and send it to the processors named in the Privacy Policy, for the purposes in section 4 of the Privacy Policy.

(b) The member we assign you for the week can see your profile. No other member can.

(c) We use your personal data to develop our own matching algorithm. The AI service does not keep the text we send it, and it does not use that text to train its models.

(d) You can see content from other members only through your match: their profile and your chat. It stays theirs. You must not copy it, or share it outside Mayfly, without their agreement.

(e) You are responsible for your content. It must be accurate and kept up to date, and it must not break these Terms or put you or us at legal risk.

(f) Think before you share. Your content, and what you send in a chat, can be seen by your match. If you share your contact details with another member, you do it at your own risk.

(g) We cannot promise that another member will not copy or share what they see. Do not share anything you would not want a match to see.

(h) We may review, remove or restrict your content when it breaks these Terms or the law. We do not have to put it back.

9. Mayfly content

You may use Mayfly. You may not take it.

(a) Mayfly content is what we make: the software, the matching algorithm, the scores we compute, the design, the name, the logo and our text.

(b) We own the Mayfly name, the logo and our other marks. We own, or are licensed to use, everything else in Mayfly content.

(c) We give you a limited, personal licence to use Mayfly for its purpose. It is revocable and you cannot transfer it.

(d) You must not copy, imitate or re-publish Mayfly content, or use the Mayfly name or logo, without our written consent.

(e) You must not scrape or harvest data from Mayfly, reverse-engineer or decompile it, make anything derived from it, or use it, its algorithm or its design to build or train a competing product.

(f) You must not sell, share or sub-license your access, or remove any notice of ownership.

(g) Your content stays yours (section 8). We do not claim ownership of the scores we keep about you; we keep them and use them as the Privacy Policy says.

10. Your personal data and AI processing

Your personal data is covered by the Privacy Policy. This section covers the AI processing of your chats.

(a) We use your personal data to operate, protect and improve Mayfly. The details are in section 4 of the Privacy Policy.

(b) We use a third-party AI service to read and categorise your chats. It helps us derive your personality scores, which we use to match you.

(c) You agree to this in a step when you sign up. It is its own step: accepting the Terms of Use or the Privacy Policy is not that agreement. It is a condition of using Mayfly, because we cannot match you without it. If you do not agree, you can leave Mayfly. You can ask us to stop by emailing privacy@mayflydating.com.

(d) We store your messages in plain text. At the end of each week, the third-party AI service reads and categorises your chats to help us derive a score about you for each of 16 personality traits. We save those scores and use them to match you.

(e) The 16 traits are listed in section 3 of the Privacy Policy. We also save your bio intent, which comes from your bio. No third party has access to our matching software. The AI service does not keep the text we send it, and it does not use that text to train its models.

(f) Matching depends on the AI processing, so we cannot match you without it. If you want it to stop, email privacy@mayflydating.com and ask us to delete your data. We do it by hand. Pausing your account pauses the analysis (section 6).

(g) Some of what you tell us is sensitive, and all of it is optional. How we handle it is in section 6 of the Privacy Policy.

(h) You have rights over your personal data. They are in section 9 of the Privacy Policy.

(i) We use your email to sign you in and to send you messages about your account.

11. Third-party services

Some of what Mayfly does runs through other companies’ services.

(a) Payments go through Apple’s App Store.

(b) Sign in with Apple and push notifications also run through Apple.

(c) RevenueCat records week-pass purchases for us.

(d) Resend sends our email, such as sign-in links.

(e) DigitalOcean hosts Mayfly and stores what we hold about you.

(f) TypeSafe reads and categorises the text of your chats, as section 10 says.

(g) Section 7 of the Privacy Policy names these companies and what each does with your personal data.

(h) A service that is not ours has its own terms, and we are not responsible for it.

12. Reports, blocks and bans

You can report and block other members, and we can ban accounts.

(a) You can report and block other members. We may review a report.

(b) You must not file a report you know is false.

(c) We do not read your messages as a matter of routine. We may read a message, and we keep the right to, where we need to in order to keep members safe, to enforce these Terms or where the law requires it.

(d) We may ban an account that breaks these Terms.

(e) If we find that an account belongs to someone under 18, we ban it.

13. Ending your account

You can leave at any time. We may end an account that breaks these Terms.

(a) You can deactivate your account at any time (section 6).

(b) We may ban an account that breaks these Terms (section 12).

(c) If you delete your account, we delete all your data. That includes your chats, so your match no longer sees them. The one exception is a joint score, which stays until both members have deleted their accounts.

(d) You can also ask us by email to delete your data. Write to privacy@mayflydating.com. We handle requests about your personal data by hand.

(e) We may suspend or end your access at once, without notice, if you break these Terms or the law, or put anyone at risk. Sections 8, 9, 14, 15, 16 and 17 continue after your account ends.

(f) What we keep when your account ends, and for how long, is in sections 8 and 10 of the Privacy Policy. If you pause your account instead, we keep your data (section 6).

14. What we do not promise

We promise one match for each credit, and nothing else about your matches.

(a) When the beta ends, each credit you hold gets you one match. We do not promise when you will get it.

(b) We take a credit only when we give you a match. If we do not give you a match, you keep the credit.

(c) If you do not pay, we assign you matches on the same terms, and we promise nothing about when.

(d) We do not promise a date, a relationship, an outcome or that you and your match will suit each other.

(e) We do not screen members or check what they say about themselves. Take care when you meet anyone; the Safe Dating Practices say how.

(f) Mayfly is provided “as is” and “as available”. We do not promise that it will run without interruption or error, or that every match will be a good one.

(g) What other members say and do is theirs, not ours.

15. Our liability

This section sets the limit of our liability.

(a) Nothing in these Terms limits our liability for death or personal injury caused by our negligence, for fraud, or for anything else the law does not let us limit. Nothing in them takes away the mandatory consumer rights you have under the law of the country where you live.

(b) Subject to (a), we are not liable for what members say or do, for anything that happens when you meet another member, or for loss we could not reasonably have foreseen.

(c) Subject to (a), our total liability to you for all claims is limited to the greater of the amount you paid us in the twelve months before the claim and 100 US dollars.

16. Claims about your content

This section says who answers for claims about what you post.

(a) You are responsible for your content. If someone makes a claim against us because of content you posted that breaks these Terms, you agree to cover our reasonable losses and costs from that claim, including reasonable lawyers’ fees, to the extent the law allows.

(b) This does not apply to the extent that a mandatory consumer right forbids it.

17. Governing law and disputes

This section says which law applies and where disputes go.

(a) These Terms are governed by the law of Missouri, United States. Nothing in them takes away the mandatory consumer rights you have under the law of the country where you live, or limits your right under Article 79 of the GDPR to bring proceedings before the courts of the Member State where you live.

(b) Before you start a claim, email team@mayflydating.com and give us a chance to put it right.

(c) These Terms, with the Privacy Policy, the Community Standards and the Safe Dating Practices, are the whole agreement between you and us about Mayfly.

(d) If a part of these Terms cannot be enforced, the rest still applies.

(e) If we do not enforce a right straight away, we have not given it up.

(f) You cannot transfer your rights under these Terms to anyone else.

18. Changes to these Terms

We tell you when these Terms change in a way that matters.

(a) If we change this document in a way that matters, we tell you in the app. The change applies one week after we tell you. The date at the top shows the latest version.

19. Contact

Here is how to reach us.

(a) Questions about your personal data, and requests about it: privacy@mayflydating.com. Everything else, including a security problem: team@mayflydating.com.