Momentum / Publika · 22 October 2026
Publika terms.
Publika is for people 13 and over, where the law of the country they join from permits it: photos, group conversations and calls with your friends. It uses your existing Momentum account. These terms cover your use of Publika alongside the cinemaOS Terms and Licence Agreement, which still governs your Momentum account, any cinemaOS plan, trial, software licence and billing. Publika does not require a subscription.
1. Who provides Publika, and who may use it
Julien Kerknawi, trading as Momentum Studios, is a Belgian sole trader with enterprise number 0648.946.826 and VAT number BE0648946826. Registered establishment: Jules Van Biesbroeckstraat 156, 9050 Gent, Belgium. Contact support@mntm-studios.com. You must be at least 13 to use Publika, or older where applicable law requires a higher minimum: Publika applies the minimum of the country you join from, and 18 where it has not confirmed a lower one. You give your date of birth when you make your Frame; giving a false date breaks these terms. Age is self-declared, not verified from an identity document. Existing members without a date must provide it before continuing. An account whose recorded date is below the minimum cannot use social features; account data, deletion, support and appeal routes remain available. Visitors must confirm they are at least 13 before browsing community content. If a recorded date is wrong, contact support; creating another account to evade the rule is not permitted.
2. Getting in: three friends
Anyone 13 and over, or the minimum age where you live if that is higher, can join Publika with an email address and their own date of birth. Each member can invite up to three friends at a time with a photo of them; the photo becomes the friend’s profile picture if they come in, and they can change it. An invite nobody claims is deleted after 7 days, photo and all. Only invite people you know, with a photo they would be happy to see, and never a stranger or anyone under 18. The friend can say “Not me” without an account: the invite and its photo are deleted at once and you cannot invite them again. Do not sell, trade, publish in bulk or spam invites. We may pause a member’s invites after refusals or a report we uphold. Members who came in through a Door before keep that line on their Frame, and a Door already sent works until it closes.
3. Your Frame, and what others make of you
Your Frame is your page. Other members can name you in a photo, write a line about you, send you a post that reminds them of you, put a word on something of you, or suggest that you are in someone's photo. Nothing of that is shown on your Frame or anywhere else in your name before you choose to keep or show it, and you can take it down at any time; saying "Not really me" is never told to anyone. Name and describe people truthfully and kindly: do not use these features to harass, mislead, expose or embarrass someone, or to name someone in a photo they are not in.
4. Posts, credits, reshares and hearts
Share a post with World, your approved Followers, or a Club you can post in. A post is a photo, a video and/or a caption. You keep ownership of everything you post. Share only material you own or have permission to share, including permission from the people in it and the people you made it with. Do not post someone's private information, or material you do not have the rights to.
You may credit collaborators on a post; a credit appears on someone's Frame only after they accept it. Where reshares are available, other members may reshare your public post: a reshare points to your post and is never a copy. Hearts are a reaction; the number of hearts and reshares is shown to the post's author, while others see a few names. Comments follow the audience of their post.
5. The licence you give us
So that Publika can work, you grant Momentum a worldwide, non-exclusive, royalty-free licence to store, reproduce, adapt for display, encode, moderate, translate captions, distribute and make available what you post, for as long as it stays on Publika, and to let our service providers do the same only to run Publika. This includes showing your posts in Stream, Today, on your Frame, in Clubs, in Discover and in search, letting other members reshare them, and letting other members download your public photos and videos as a file that carries a Publika watermark with your @username (and, for a video, a short Publika ending), unless you turn downloads off in Settings. It also includes showing your public posts in Publika's own promotion of Publika, on Publika, its website, its app-store pages and its own social channels, always with your name; ask us and we stop using a post that way. We never sell your work or license it to anyone for their own advertising. Copies other members downloaded before you removed a post, and reshares already seen, cannot be recalled.
6. Clubs
Members can start a Club with a name, a description and public or private visibility. Following a public Club brings its public posts into your Stream; joining makes you a member, and posting follows the Club's rules. Private Clubs are invite only. Membership counts show accepted members; follows and pending requests do not count. Restricted posts stay restricted when a Club becomes public, and leaving or being removed ends access to them. Club owners manage membership and discussion within the Community Guidelines. We may step in in any Club to deal with unlawful material, safety risks or serious rule violations. The official Momentum Club is where Publika and cinemaOS updates, problems and ideas live; official Club names are reserved.
7. Messages, Circles and calls
Direct messages and Circles (group conversations), their photos, videos, voice notes and plans are private to their participants. The service checks submitted text for selected objectionable-content patterns before publication or delivery. These checks are limited and do not identify every violation. Photos, videos and audio are not automatically classified for objectionable content; members can report them for human review. Service staff can access them only when that is necessary to handle a report, a security incident or a legal duty. They are encrypted at rest by the service; they are not end-to-end encrypted. Calls connect through Cloudflare RealtimeKit and are not recorded by Publika.
Whisper
A whisper (a text, photo or short clip) expires unopened after 24 hours. Each recipient can open it once, for up to 60 seconds. Closing it ends that view; there is no replay. It is not a promise that another person cannot capture it: screenshots, screen recordings or another camera may retain it, and screenshot notices are best effort.
Report is available inside the viewer. If you choose to include the content while it is still available, Publika seals a separate restricted copy for the safety team, retained for up to 365 days. After the content is gone you can report the item and sender, but we cannot recover the expired content for that report. The ordinary encrypted payload is destroyed when all recipients have finished or it expires. Delivery and viewing metadata is retained for up to 30 days from creation; an abuse-report record follows its separate retention period.
8. Video
Videos you upload are sent from your device to Cloudflare Stream, which encodes, stores and delivers them for Publika as our processor, possibly outside the EU under Cloudflare's data processing terms and the EU Standard Contractual Clauses. Videos are limited to three minutes. A video you never post is deleted after 48 hours, or after the 30 days of Your shots when you took it with Publika's camera (longer only if you chose to keep your shots); a posted video is deleted from Stream when you remove the post or erase your account.
9. Rules, reports and decisions
Publika has no tolerance for objectionable content or abusive users. Content that breaks these terms or the Community Guidelines is removed, and an account that posts it or abuses other people is suspended or ended. You can report content, a member or a message with its report control, and block any member at any time. Our compliance officer reviews reports within 24 hours. Reporting does not itself prove a violation, and serious cases may need further investigation.
Follow the Community Guidelines. You can report content, a member or a message with its report control, and anyone can send an illegal-content notice without an account. We may remove or limit content, limit features, invites or how far posts travel, or suspend or end an account that breaks the law or these terms, or that puts people or Publika at risk; we may act at once where that is needed to protect people or the service. We explain a decision to the member it affects and offer free human review through Moderation and appeals, including during a suspension. The Safety and rights notice explains how this works.
How Stream and Today are ordered
Stream has two modes. Familiar shows, newest first, posts from people you follow, their public reshares and the Clubs you joined or follow; nothing is ranked. Fresh combines those with selections, open questions for you and recent public work from the wider network; its order can use your connections, a post's age, reactions and discussion, and limits repeated posts from the same person or Club. Today is one page that ends: what is at your Door, what is of you, your Circles' plans, Same Time, your Clubs' events, one small thing and the photos of the people you follow, in time order and not ranked. We do not use sensitive personal traits to order anything.
Fresh may also show two daily cards, each at most once a day and never on top of each other. Same Time shows the day’s shared prompt and the faces of people who added a photo that you are allowed to see. One small thing shows one recent open question, feedback request or “looking for” post from someone you follow or a Club you joined, that you have not answered or set aside; unanswered posts come first and the rest rotate by a fixed daily rule, with no learning from your behaviour. The card says why it is shown and can be dismissed, and a dismissed post does not come back.
Same Time photos are not posts: they never appear on a Frame, in Stream, Clubs or search, they are shown only to your two-way friends (people you follow who follow you back) and the people in your Same Time group, once they have added a photo of their own in the same 24 hours, and each leaves Same Time 24 hours after it was taken, whatever the time of day. We keep whether a photo came a little later than the moment Same Time opened, only to say so on it, and you can report any photo you can see. A photo that lived its day then stays in Your days, where only you see it, until you delete it; a photo you took back is deleted with its image.
Your days
Each photo you add to Same Time is shown to your people (your two-way friends and your Same Time group) for 24 hours from the moment you took it; it does not end at midnight. After that it is not deleted: it moves to Your days, with its day, the prompt, your line and its place. Only you see Your days.
Your days stay until you delete a photo, a day or all of them, or until your account is erased. You can turn off Keep my days in Settings. From then on, your photos go after their 24 hours.
We never delete your days because you did not pay, and we never charge to open them, download them or take them with you.
Your people’s days. If you say yes to “Your people can look back at your days”, the people who saw your day can see it again in their days. They see your photo; they never get a copy. When you delete it, block them or turn this off, it is gone for them too.
People in your photos. Your days are for you. If someone in one of your photos asks you to take it out, we tell you. If they ask us, we may keep it out of anything you share, and we tell you both why.
If you stop using Publika. We do not delete your days because you are away. After five years without signing in, we write to you twice, with a way to download everything, before your account is closed.
10. Our responsibility
We work to keep Publika available, safe and secure, but we provide it as it is and cannot promise it will always be available or free of errors. Members are responsible for what they post and send; we are not responsible for content created by members, and to the extent the law allows we are not liable for indirect or consequential loss, or for loss of data you did not keep elsewhere. Nothing in these terms limits liability that cannot be limited by law, including for death or personal injury caused by negligence, for fraud, or your rights as a consumer under mandatory law.
11. Leaving Publika
You may stop using Publika at any time and request deletion of your Momentum account through the account portal. Deletion removes your Frame, your contributions, messages, follows, credits, reshares, hearts and settings, subject to records we must keep for law, security, moderation or a dispute, as the privacy notice explains. You can export your Publika data first.
12. Changes and law
We may update Publika and these terms. Material changes are presented in Publika and require explicit acceptance of the current Terms and Community Guidelines before continued social use. Opening a notice or continuing to browse does not record acceptance. We retain the accepted versions, time and whether acceptance occurred on the web or app until account erasure. Belgian law governs these terms, while consumers keep the mandatory protections of the country where they live. Nothing here limits your statutory consumer or data protection rights.
Questions about these terms: support@mntm-studios.com.