Privacy Policy

Article 1. Purposes of processing personal information

The Operator processes personal information only for the purposes below. If a purpose changes, the Operator will take the necessary measures, such as obtaining separate consent under Article 18 of the Personal Information Protection Act.

1. Sign-up and identification: identifying users who signed up with a Google or Kakao account, keeping them signed in, and letting them link two sign-in methods to one account.
2. Sharing dates between two people: showing the day you met, days, birthdays, nicknames and the “Days we celebrate” settings to both accounts linked by invitation.
3. Anniversary calculation: calculating and showing days together, 10-day and 100-day milestones and yearly anniversaries, and the number of a birthday and age.
4. Personal notifications and display language: sending web push notifications to registered devices at the timings and times the user chose, making sure the same notification is not sent twice, and retrying failed deliveries. Screens and notifications are shown in the language the user chose (Korean or English).
5. Answering inquiries and handling rights requests: replying to inquiries and requests and informing users of the outcome.
6. Service protection and incident response: blocking abnormal access and finding the causes of errors.

Article 2. Personal information items processed

Processing needed for the features users sign up to use, such as sign-in, date sharing and notifications, is based on Article 15(1)4 of the Personal Information Protection Act (entering into and performing a contract). Optional items are processed only when the user enters them or turns on the feature. The minimum processing needed to protect the service, such as access logs, is based on subparagraph 6 of the same paragraph (legitimate interests) and does not go beyond that purpose and scope.

Dasom does not access your Gmail, Contacts, Calendar or Photos. Google user data is used only for the sign-in and profile features above and is not sold or used for ad targeting or to train general-purpose AI models. Dasom complies with the Google API Services User Data Policy, including the Limited Use requirements.

Article 3. Processing and retention periods of personal information

The Operator keeps personal information only for the periods below and, when a period ends, destroys the information without delay under Article 4.

Because Dasom charges no fees, there are no transaction records kept separately under the Act on the Consumer Protection in Electronic Commerce (전자상거래 등에서의 소비자보호에 관한 법률) or similar laws. If any information must be kept under law, it will be stored separately from other information only for that period, and the legal basis and items will be stated in this policy.

Article 4. Procedure and method for destroying personal information

• Procedure: Personal information is destroyed without delay when its retention period ends or the purpose of processing has been achieved. When you leave, your account is deleted on the spot, and the database deletes the linked profile, birthday, personal settings, device subscriptions and delivery records along with it.
• Method: Electronic records are deleted from the database and the relevant systems so that they cannot be recovered. The Operator makes no separate database copies or backups. Any printed material is shredded.
• What remains: Dasom cannot delete invites already sent through external messengers such as KakaoTalk, or notifications already shown on a device; you can delete them in that app or on that device.

Article 5. Information visible to your partner, and provision to third parties

When someone who received an invite link or code signs in, they can see the inviter’s Dasom name before accepting. When you send an invite via KakaoTalk, the invite message, the invite code and link, and a card title that may include your name are delivered to Kakao and to the recipient the user chose. Anyone the link is forwarded to can also open the invite until it expires.

The Operator does not provide personal information to third parties except for sharing the user chooses, the entrustment in Article 6, and the cases set out in Articles 17 and 18 of the Personal Information Protection Act (such as where a law has special provisions). The Operator also does not make additional use or provision without the data subject’s consent under Article 15(3) or Article 17(4) of the same Act; if it ever does, it will first publish its criteria for that decision in this policy.

Article 6. Entrustment of processing and overseas transfer of personal information

The Operator entrusts the processing needed to provide the service to the companies below. This processing includes overseas transfer. Because it is entrustment and storage needed to enter into and perform the contract with users, the matters in paragraph 2 of Article 28-8 of the Personal Information Protection Act are disclosed below under paragraph 1, subparagraph 3(a) of that Article.

If you do not want the overseas transfer, you can stop using the service before signing up, leave after signing up, or ask for the transfer to be stopped through the contact in Article 13. In that case, you cannot use the service of saving and sharing dates with an account.

If a processor or the work entrusted changes, we will announce it through this policy. The Operator checks that processors do not process personal information outside the purpose of entrustment, in line with each company’s terms of service and data processing terms.

Article 7. Installation, operation and refusal of cookies and other automatic collection tools

Dasom uses only the cookies and browser storage needed to keep you signed in and to remember the language you chose on this device and the state of the screen. We do not use tools that collect behavioral information for advertising, visitor analytics or personalized advertising (cookies, pixels, advertising identifiers).

If you have not chosen a display language, we show Korean or English based on your device’s language setting that your browser reports (Accept-Language), and we do not store that value. The screen mode follows your device’s light or dark setting by default; a mode you choose stays only on this device and is not sent to our servers.

You can delete or block cookies and site data in your browser settings. If you block them, you cannot stay signed in, which makes Dasom difficult to use. Menu names may differ slightly depending on the browser version.

• Chrome (Android and computer): Site information icon to the left of the address bar → Site settings → Delete data. To clear everything, go to Settings → Privacy and security → Delete browsing data and choose “Cookies and other site data.”
• Safari (iPhone and iPad): In Settings → Apps → Safari → Advanced → Website Data, delete us.or.kr. If you remove Dasom from your Home Screen after adding it there, its storage is deleted with it.
• Samsung Internet: In Settings → Privacy and security → Delete browsing data, choose “Cookies and site data.”
• Edge: In Settings → Cookies and site permissions → Manage and delete cookies and site data, delete us.or.kr.

Article 8. Information sent to external services

The services below are requested directly by your browser or used for features you choose. We do not send the list of anniversaries stored in Dasom, and each service’s own privacy policy also applies.

• Fonts (Google Fonts, Google LLC, United States): When loading screen fonts, your browser sends its IP address, the fonts requested and browser information.
• KakaoTalk sharing (Kakao, Republic of Korea): If you choose to send an invite via KakaoTalk, Kakao’s sharing script is loaded and the invite content described in Article 5 is passed to Kakao.
• Web push services (Google, Apple, Mozilla, Microsoft, United States): We send the subscription endpoint and encrypted notification content to the push service of the browser where you allowed notifications. The content is encrypted so that only your device can decrypt it, and we ask that notifications that could not be delivered be discarded after at most 1 hour.

Article 9. Measures to ensure the security of personal information

• Administrative measures: The Operator serves as Chief Privacy Officer and manages personal information directly, and access to the database and server settings is limited to the Operator alone.
• Technical measures: All communication is encrypted with HTTPS. Row-level access rules in the database allow reading and writing only your own information and that of the partner you linked with, and the server verifies the signature of sign-in tokens. The server secret key is used only for server tasks such as processing account deletion and sending notifications, and is never sent to the browser. Dasom does not receive or store passwords.
• Physical measures: We have no server room of our own; data is stored under the security of the processors’ data centers. Any paper records are kept in a place with a lock.
• Responding to breaches: If we learn of the loss, theft, leakage, forgery, alteration or damage of personal information, or of the possibility of it, we will without delay notify the affected users of the items involved, when and how it happened, how to reduce harm, our response and remedy procedures, how to exercise rights such as claiming damages or dispute mediation, and our contact details, and we will report it to the Personal Information Protection Commission (개인정보보호위원회) or a specialized agency as required by law.

Article 10. Rights and obligations of users and legal representatives, and how to exercise them

You may at any time access your personal information, request its correction, deletion or suspension of processing, and withdraw consent (Articles 35 to 37 of the Personal Information Protection Act).

Directly in the app

• Under “For both of us” in Settings, correct names, nicknames, the day you met, birthdays and days we celebrate. Clearing a nickname deletes it; names, the day you met and birthdays are required, so you can change them, and they are deleted when you leave. Days are edited or deleted from the list on the home screen.
• Under “Just for me” in Settings, change when and at what time you are notified, the notification text, the display language and screen mode, and whether this phone gets notifications, and remove devices you no longer use. Reminders set for an individual day are changed on the screen for editing that day.
• Under “Account & Dasom” in Settings, disconnect a sign-in account or delete your account with “Delete account.” You can also remove Google’s access under third-party connections in your Google Account; that removal and leaving Dasom are handled separately.

By email

• Send what you want (access, correction, deletion, suspension of processing, withdrawal of consent) to hsgoh@axiommathlab.kr. Sending from the email address of the account you signed up with makes identity verification faster; if needed, we will guide you through verifying your identity with your sign-in account.
• A representative may make a request by sending a power of attorney signed by the user together with documents that verify the representative’s identity.
• The Operator handles a request and informs you of the result within 10 days of receiving it. You can view your information on screen or, if you wish, we will send you a copy of your account and date information as an electronic file. No fee is charged.
• If we refuse a request or handle only part of it as permitted by law, we will tell you the reason and how to object. Objections are received at the same email address, and we will inform you of the result of our review within 10 days.
• The right to request transmission under Article 35-2 of the Personal Information Protection Act applies to controllers that meet the criteria set by Presidential Decree. Dasom does not meet those criteria, but you can take your information with you using the copy described above.

Users must enter their own information accurately and must not enter the personal information of others, including their partner, without that person’s consent.

Article 11. Personal information of children under 14

Only people aged 14 or older may sign up for Dasom, and we do not knowingly process the personal information of children under 14. If we learn that a child under 14 has signed up, we will delete that account and its information without delay. A legal representative may request access to, deletion of, or other action on a child’s personal information (Article 38(2) of the same Act).

Article 12. Information we do not process

• We do not process unique identifiers such as resident registration numbers, sensitive information such as health or beliefs, payment information, location information, contacts or photos. Accordingly, there is nothing to disclose about the possibility of sensitive information being made public.
• We do not process pseudonymized information.
• We do not make automated decisions under Article 37-2 of the Personal Information Protection Act. Anniversaries and notification times are simply calculated from the dates and settings users enter, and are not used for decisions that affect users’ rights or obligations.
• We do not use personal information for advertising, marketing or AI training.

Article 13. Chief Privacy Officer and handling of complaints

The Operator bears final responsibility for Dasom’s processing of personal information and responds to inquiries and complaints without delay.

Article 14. Remedies for infringement of rights

If you need counseling or dispute mediation about a privacy infringement, you can contact the bodies below.

• Personal Information Dispute Mediation Committee (개인정보분쟁조정위원회): 1833-6972, no area code
• Personal Information Infringement Report Center (개인정보침해신고센터): 118, no area code
• Supreme Prosecutors’ Office (대검찰청): 1301, no area code
• Korean National Police Agency (경찰청): 182, no area code

Article 15. Changes to this Privacy Policy

This policy takes effect on November 11, 2026. When we change it, we announce the effective date and the changes on this page from 7 days before they take effect, and changes important to users’ rights from 30 days before. For changes that require separate consent, we obtain consent before they apply. Past versions can be read in the revision history below. If this policy differs from the terms of the contract with a user, whichever is more favorable to the user applies.

The conditions of use are in the Terms of Use.

Revision history

• Effective November 11, 2026Upcoming

  Announced November 4, 2026

  • The items the law requires are now set out in separate articles: the purposes of processing, the required, optional and automatically generated items, the retention period for each item, and the destruction procedure.
  • Information we were already processing, such as birth year, the notification time for each timing, how a day is counted, and the wording shown in notifications, is now listed item by item.
  • Added the names, purposes and retention periods of cookies and browser storage and how to delete them in each browser, our security measures, notification in case of a breach, the time limits for handling requests to exercise your rights, and how to raise an objection.
  • Added the Supreme Prosecutors’ Office and the Korean National Police Agency to the bodies you can turn to for remedies, and added a revision history where earlier versions can be read.
  • Server functions now run in the Republic of Korea (Seoul), next to the database, instead of the United States (Virginia). They have run in Seoul since November 5, 2026.
  • For the English screens, the light and dark screen modes and the reminders you can set for each day, all available since November 5, 2026, we now list the display language and per-day reminders in your personal settings, the cookie that remembers the language you chose (dasom-lang), and the browser storage that remembers the screen mode and changed nicknames. This was added to this revision on November 5, 2026.
  • Birthday (year, month and day of birth) moves from the optional items to the required items for using the service. You add it when you start, can change it in Settings, and it is deleted when you leave. This was added to this revision on November 5, 2026.
  • The purposes of processing, whether we provide information to third parties, and the companies we entrust with processing do not change.

• Effective November 4, 2026In effect

  Announced November 4, 2026

  First version