ZZEND ("the service") takes your personal data seriously and complies with applicable privacy laws. This policy explains what we collect, why, and how we handle it.
1. What we collect
Account info: your email address and password (the password is stored only as a salted hash, never in plain text)
Content you upload: information about the other person (name or nickname, MBTI, birth date, notes) and your practice conversations. The chats you paste for "what they mean" and reply suggestions are not kept: we read them, produce the result, and drop the text.
Usage records: credit usage, payment history (payments are handled by our payment provider; card numbers are never stored on the service), and support inquiries
Collected automatically: a cookie identifying your device, and a one-way
hash of your IP address (2026-08-09). We do not store the address itself — only a
salted hash that cannot be turned back into it. We do the same with your browser's
settings (screen size, graphics, time zone, language) and keep only a one-way hash of
them (2026-10-05). We use these hashes for two things, and
nothing else: making sure the free trial is given once per person, and keeping the
service safe — spotting duplicate accounts, payment fraud, and automated abuse
(2026-08-21). They are deleted after 90 days.
Your browser's time zone and language (2026-08-21), so we know roughly which
country you are in. This is what your browser reports — we do not look up your location
and we do not store your IP address to work it out.
※ Original screenshot images you upload are used only for analysis and are not stored on our servers — unless you choose to send one to us with a report, in which case we keep it to review quality until you delete your account.
Neither is the conversation text, theirs or your own draft. What we keep from a session is the
result we showed you and a few short observations ("replies get shorter late at night") that let the
next suggestion still fit the person. Those observations are visible to you and you can delete them.
2. Why we collect it
To provide the core features: person analysis, practice conversations, "what they mean," and reply suggestions
To manage credits, process payments, and grant friend-invite rewards
To answer inquiries, prevent abuse, and improve service quality
3. Operator access to your content
Our operator screens cannot open what you upload. The conversations you paste, the text we read out of your screenshots, and the notes you write about someone are not returned to any staff view. Practice chats are kept until you delete them (open the chat, tap ⋯, then Delete this chat). They may be reviewed by our team to improve the practice partner.
The exceptions are yours to create. When you submit a Reconnection Strategy on a specific record, that record — and any chat file you choose to attach — is opened so it can be analysed in depth and checked for quality before the report reaches you. The same applies to anything you send us yourself: a report, a support inquiry, or a practice you choose to send us when you leave the practice room, along with the context you choose to attach. And when an answer misses, that one conversation — the full text you pasted and the original screenshots you uploaded — the answer we got wrong, and anything you write to correct it are sent to us so we can fix the quality. We keep them for that review, and they are deleted when you delete your account. This happens when you tap "Was this answer off?", the moment you rate an answer with stars, and when you tap "Fix it" or "Not quite? Correct it" — rating or correcting an answer is what sends it.
In every case it is one record, chosen by you, in that moment. Nothing else in your account opens with it.
The operator can still see records that contain no conversation content: how much you uploaded, when, which feature you used, credit and payment history, and support tickets. These are used only for service operation, abuse prevention, and support, and are never shared or used for another purpose.
4. Third parties and processors
Anthropic (US): conversations you upload are sent to Anthropic's API for AI analysis and reply generation. Anthropic does not use data sent to its API to train its models.
Payment provider: payment processing
Meta and Google (US) — advertising measurement: if you arrive by clicking one of our ads, we load that platform's measurement tag so we can tell whether the ad led to a sign-up. Anyone who did not arrive from an ad gets no such tag at all. In Europe we ask first, and load neither one unless you accept; if you decline, both stay off. Nothing you paste or write is ever sent to them — the tag sees only that a page was opened and, if it happens, that an account was created.
Meta (US) — purchase measurement: when a purchase completes, our server tells Meta that a purchase of that amount happened, because checkout finishes on the payment provider's site and the browser tag cannot see it. What goes with it is only what is needed to match the purchase to an ad: your email address as a one-way hash (never the address itself), and the ad-click and pixel identifiers if you have them. The amount and currency go too. Nothing you paste or write is ever sent, and neither is your name, your IP address, or your browser. In Europe we send nothing unless you accepted ad measurement, and we also send nothing when we cannot tell where you are.
iPhone app — App improvement (ad measurement · tracking), optional (2026-10-05): in the iPhone app, a purchase is reported to Meta (as described above) only if you turn on the optional item "Ad measurement (tracking)" on the first consent screen and then allow the iPhone "Allow tracking" prompt. If you skip either one, nothing is sent, and the app works the same. You can turn it off any time in the My tab, or in iPhone Settings → Privacy & Security → Tracking.
Beyond these, we do not share personal data with third parties except when required by law.
5. Retention and deletion
Practice conversations are kept until you delete them. Each person has one chat; starting a new situation continues the same chat. Delete a chat from inside it (⋯ → Delete this chat), or delete the person or your account to remove all of it.
What you upload for live coaching (chat exports, screenshots, pasted messages, your own drafts) is not written to our database at all. It is used to produce your result and dropped in the same request. Screenshots are never stored as images — only the text read from them, and that text is dropped too. The one exception is a report you send us yourself (see below): that one set of screenshots is kept as images so we can see what went wrong, and deleted when you delete your account. What remains is the AI result and short observations ("replies late at night", "avoids money talk").
Moving from the website to the app with a 4-digit code. If you tap Install the app and enter the code in the app, the chat you pasted and the screenshots you uploaded go along so you can keep going where you left off. They are held only in our server's memory — never written to our database — until the app picks them up, and are gone after 30 minutes either way.
A question you type to us is kept. When you use that box to ask us something or describe your situation — "he hasn't texted in three days, what do I do" — that is your own writing rather than a chat, so we keep it along with the answer we gave, and we read it to make the product better. A line of theirs you quote inside your question stays with it, because it is part of what you asked. A conversation you paste with nothing addressed to us is not kept: it is dropped in the same request, as it always has been. You can delete everything at any time from the My tab.
When you delete a person, practice record, or live record in the app, it is deleted immediately.
You can delete your account (withdraw) in the app: My tab → My account → Delete account. Your account and related records are deleted without delay. How to delete your account lists the exact steps, what is deleted, what we keep, and how to ask us to delete it if you can't open the app.
Records we are legally required to keep (such as payment records) are retained for the legally mandated period and then destroyed.
6. Your rights
You can request access to, correction of, deletion of, or a halt to the processing of your personal data at any time, via Contact us in the app or the email below. To delete your account and its data, see How to delete your account.
7. Contact
Privacy questions: Contact us in the app, or email support@zzend.app
8. Changes to this policy
If this policy changes, we will post a notice in the service 7 days before it takes effect.
Montana CO.,Ltd (몬타나주식회사) | CEO: Kim Seok | Business reg. no. 148-87-01772 (Korea)
62-12, Soemi-ro 129beon-gil, Dongnae-gu, Busan, South Korea | support@zzend.app