428 respects the privacy of its users (“you”) and has developed this Privacy Policy to demonstrate its commitment to protecting your privacy. This Privacy Policy describes the information we collect, how that information may be used, with whom it may be shared, and your choices about such uses and disclosures. We encourage you to read this Privacy Policy carefully when using our application or services or transacting business with us. By using our website or application (our “Service”), you are accepting the practices described in this Privacy Policy.
If you have any questions about our privacy practices, please refer to the end of this Privacy Policy for information on how to contact us.

1. Information we collect about you

1.1 In General. We may collect information that can identify you such as your name and email address ("personal information") and other information that does not identify you. We may collect this information through a mobile application. By using the Service, you are authorizing us to gather, parse and retain data related to the provision of the Service. When you provide personal information through our Service, the information may be sent to servers located in the United States and countries around the world.

1.2 Information you provide. In order to register as a user with 428, you will be asked to sign in using your Facebook login. If you do so, you authorize us to access certain Facebook account information, such as your public Facebook profile (consistent with your privacy settings in Facebook), your email address, interests, likes, gender, birthday, education history, relationship interests, current city, photos, personal description, friend list. You will also be asked to allow 428 to collect your location information from your device when you download or use the Service. In addition, we may collect and store any personal information you provide while using our Service or in some other manner. This may include identifying information, such as your name, address, email address and telephone number, and, if you transact business with us, financial information. If you chat with other 428 users, you provide us the content of your chats, and if you contact us with a customer service or other inquiry, you provide us with the content of that communication.

1.3 Use of technologies to collect information. We use various technologies to collect information from your device and about your activities on our Service.

1.3.1 Information collected automatically. We automatically collect information from your browser or device when you visit our Service. This information could include your IP address, device ID and type, your browser type and language, the operating system used by your device, access times, your mobile device’s geographic location while our application is actively running, and the referring website address.

1.3.2 Mobile Device IDs: If you're using our app, we use mobile device IDs (the unique identifier assigned to a device by the manufacturer), or Advertising IDs (for iOS 6 and later), instead of cookies, to recognize you. We do this to store your preferences and track your use of our app. Unlike cookies, device IDs cannot be deleted, but Advertising IDs can be reset in “Settings” on your iPhone. Ad companies also use device IDs or Advertising IDs to track your use of the app, track the number of ads displayed, measure ad performance and display ads that are more relevant to you. Analytics companies use device IDs to track information about app usage.

2. How we use the information we collect

2.1 In General. We may use information that we collect about you to:
deliver and improve our products and services, and manage our business; manage your account and provide you with customer support; perform research and analysis about your use of, or interest in, our or others’ products, services, or content; communicate with you by email, postal mail, telephone and/or mobile devices about products or services that may be of interest to you from us; website or mobile application analytics; and perform functions or services as otherwise described to you at the time of collection.

2.2 Job applicants. If your personal information is submitted through our website when applying for a position with our company, the information will be used solely in connection with considering and acting upon your application. We may retain your personal information, but only for the purpose of considering your application for current or future available positions. This information, which may include your name and contact information, prior education and experience, and other information you provide to us, may be shared with third-party service providers retained by us to collect, maintain and analyze candidate submissions for job postings.

2.3 In all circumstances, we may perform these functions directly or use a third party vendor to perform these functions on our behalf who will be obligated to use your personal information only to perform services for us. Also, if you access our Service from a third party social platform, such as Facebook, we may share non-personal information with that platform to the extent permitted by your agreement with it and its privacy settings.

3. With whom we share your information

3.1 Information Shared with Other Users. When you register as a user of 428, your 428 profile will be viewable by other users of the Service. Other users (and in the case of any sharing features available on 428, the individuals or apps with whom a 428 user may choose to share you with) will be able to view information you have provided to us directly or through Facebook, such as your Facebook photos, any additional photos you upload, your first name, your age, your personal description, and information you have in common with the person viewing your profile, such as common Facebook friends and likes.

3.2 Personal information. We do not share your personal information with others except as indicated in this Privacy Policy or when we inform you and give you an opportunity to opt out of having your personal information shared. We may share personal information with:

3.2.1 Service providers: We may share information, including personal and financial information, with third parties that perform certain services on our behalf. These services may include fulfilling orders, providing customer service and marketing assistance, performing business and sales analysis, ad tracking and analytics, member screenings, supporting our Service functionality, and supporting contests, surveys and other features offered through our Service. These service providers may have access to personal information needed to perform their functions but are not permitted to share or use such information for any other purposes.

3.2.2 Other Situations. We may disclose your information, including personal information: In response to a subpoena or similar investigative demand, a court order, or a request for cooperation from a law enforcement or other government agency; to establish or exercise our legal rights; to defend against legal claims; or as otherwise required by law. In such cases, we may raise or waive any legal objection or right available to us. When we believe disclosure is appropriate in connection with efforts to investigate, prevent, or take other action regarding illegal activity, suspected fraud or other wrongdoing; to protect and defend the rights, property or safety of our company, our users, our employees, or others; to comply with applicable law or cooperate with law enforcement. In connection with a substantial corporate transaction, such as the sale of our business, a divestiture, merger, consolidation, or asset sale, or in the unlikely event of bankruptcy.

4. How you can access your information

If you have a 428 account, you have the ability to review and update your personal information within the Service by opening your account and going to settings. You also may close your account at any time by visiting the "Settings" page for your account. If you close your account, we will retain certain information associated with your account for analytical purposes and recordkeeping integrity, as well as to prevent fraud, take actions we deem necessary to protect the integrity of our Service or our users, or take other actions otherwise permitted by law. In addition, if certain information has already been provided to third parties as described in this Privacy Policy, retention of that information will be subject to those third parties' policies.

5. Your choices about collection and use of your information

You can choose not to provide us with certain information, but that may result in you being unable to use certain features of our Service because such information may be required in order for you to register as user; purchase products or services; participate in a contest, promotion, or survey; ask a question; or initiate other transactions. Our Service may also deliver notifications to your phone or mobile device. You can disable these notifications by going into “App Settings” on the app or by changing the settings on your mobile device.

6. How we protect your personal information

We take security measures to help safeguard your personal information from unauthorized access and disclosure. However, no system can be completely secure. Therefore, although we take steps to secure your information, we do not promise, and you should not expect, that your personal information, chats, or other communications will always remain secure. Users should also take care with how they handle and disclose their personal information and should avoid sending personal information through insecure email. Please refer to the Federal Trade Commission's website at http://www.ftc.gov/bcp/menus/consumer/data.shtm for information about how to protect yourself against identity theft.

7. Information you provide about yourself while using our Service

We provide areas on our Service where you can post information about yourself and others and communicate with others. Whenever you voluntarily disclose personal information on publicly-viewable pages, that information will be publicly available and can be collected and used by others. For example, if you post your email address, you may receive unsolicited messages. We cannot control who reads your posting or what other users may do with the information you voluntarily post, so we encourage you to exercise discretion and caution with respect to your personal information.

8. Visiting our Service from outside the United States

If you are visiting our Service from outside the United States, please be aware that your information may be transferred to, stored, and processed in the United States where our servers are located and our central database is operated. By using our services, you understand and agree that your information may be transferred to our facilities and those third parties with whom we share it as described in this privacy policy.

9. No Rights of Third Parties

This Privacy Policy does not create rights enforceable by third parties or require disclosure of any personal information relating to users of the website.

10. Changes to this Privacy Policy

We will occasionally update this Privacy Policy to reflect changes in the law, our data collection and use practices, the features of our Service, or advances in technology. When we post changes to this Privacy Policy, we will revise the "last updated" date at the top of this Privacy Policy, and you should regularly check for the most recent version, which is the version that applies. If we make any material changes to this Privacy Policy, we will notify you of the changes by reasonable means, which could include notifications through the Services or via email. Please review the changes carefully. Your continued use of the Services following the posting of changes to this policy will mean you consent to and accept those changes. If you do not consent to such changes you can delete your account by following the instructions under Settings.

11. How to contact us
If you have any questions about this Privacy Policy, please contact us by email or postal mail as follows:

Cambridge, MA 02138

  • 428 app available in the app store to help you rediscover your childlike curiosity in learning.

    Become smarter today.


    Discuss daily fun questions with peers.

    • Once a week, join a group of a random subject
    • Once a day, discuss a fun question from each group
    • These happen at 4:28pm

    428 is available in the app store
  • 428 is constructive social activity.

    Have fun learning everyday while making friends!

    We assign a group to you each week

    Each week, we assign you a new group of a different subject. Learn subjects you're unfamiliar with to become smarter over time.

    Make friends from various disciplines

    Each group will have peers interested in different disciplines, as represented by the little icons under their pictures. Witness different perspectives in your group.

    Get one question a day, and the answer the next day

    We source questions from each subject that are fun and thought-provoking. Each day, you get one question and the answer to the question the next day.

    Discuss the question with your newfound friends

    Fun questions and a diverse group brings about stimulating conversation. Have a different take on each question every day.

  • Here are some questions from 428:

    Discuss them and get answers on the app.


    Neil Armstrong left a mirror on the moon. Why?


    Why do our hands go wrinkly after a swim?


    Why do blue jeans have tiny pockets?


    What happens when sperm travel to the speed of light?

  • Leonard Loo

    • Jerome Fisher Program in Management and Technology at UPenn, Harvard University

    "At college, I took classes all over the place; eventually I learnt how to learn fast, and that has helped me tremendously in my career as an entrepreneur. 428 similarly lets you discover knowledge from fields outside of your own. Over time, you're going to be picking up new knowledge at a lightning fast pace."

    Tomas Anar Gudmundsson

    • Recipient of fourteen academic awards in Iceland

    "You have to learn a bit every single day and be curious about the world in order to go further in life. Most of the world's successful people such as Elon Musk and Bill Gates preaches this advice. 428 makes it easy and fun to learn everyday, and if only there was 428 when I was in high school!"




    Nicola Yu

    • Industrial engineer with entrepreneurship experience, Senior Data Analyst at Capital One

    "Churchill has said that 'I am always ready to learn although I do not always like being taught'. You become more knowledgeable and smarter by being curious and learning. 428 combines social media with classes. You can learn new aspect of the world when you browse your social media instead of sitting in classrooms."

    Spandan Madan

    • Published author in Machine Learning, and developed Android app with over 20,000 active users
    "We spend a lot of time on our phones these days on social media - Facebook, Snapchat and Instagram, just to name a few. 428 is social media too, but actually helps you become smarter over time."

    Jenny Zheng

    • Ph.D. in Biology at Harvard University


    "Knowledge is power. Asking questions and being curious is the first step to learning and understanding the world. 428 will let you do just that in a fun way!"

  • Ask us why we're called 428.

    Give us your wildest guesses.

    428's email is 428app@gmail.com
    Find 428 on Facebook
    428 is a startup in the Harvard Innovation Lab
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