Yaybo · Legal

Yaybo privacy policy

Last updated: November 7, 2026

Yaybo is a learning app for children ages 4 to 9 (Pre-K to 3rd grade), used with a grown-up. This page is written for parents and guardians. It says what Yaybo keeps, where it keeps it, what leaves your devices, who can see it and how you delete it. Yaybo is offered in the United States and Canada.

The short version

• What you tell Yaybo about your child (first name, grade, answers, progress) stays on your devices and, when iCloud Sync is on, in your own iCloud. It never reaches Seize: we cannot read it.
• Yaybo has no accounts, no email sign-up, no ads, no tracking and no third-party advertising or social SDKs.
• Yaybo never records, stores or sends your child's voice. If a grown-up turns on Read-aloud, your device listens on its own while your child holds the talk button, or for a few seconds after a quick tap, and the sound is dropped at once. A grown-up can also tell Yaybo never to listen to one particular child.
• Two small things go to our own server, neither about your child: a note you choose to write to us, and an anonymous token from Apple that lets us tell which ad, if any, brought you (sent the first time Yaybo opens).
• If a grown-up buys or restores a subscription, a purchase-analytics service sees the purchase and your device's technical details. Never anything about your child.
• You can share the weekly report with another grown-up through your own iCloud, only if you choose to; that grown-up can then send your child high-fives, signed with a name they pick.
• You can review and delete everything Yaybo keeps, in the Parent Zone, behind the grown-up gate.

Who we are

Yaybo is published on the App Store by Izotz Cristobal Mota, trading as Seize Apps, in the Basque Country, Spain. We are the operator of Yaybo for the purposes of the U.S. Children's Online Privacy Protection Act (COPPA) and responsible for the information described on this page. Write to us about anything here at hello@seizeapps.com. Please do not put your child's name or details in an email.

Operator contact, as the COPPA online notice requires: Izotz Cristobal Mota, trading as Seize Apps, Ugarana kalea 3, piso 3, 48141 Ugarana, Bizkaia, Spain, telephone +34 672 53 17 63, hello@seizeapps.com.

What Yaybo keeps, and where

Yaybo keeps this on your devices and, when iCloud Sync is on, in your own private iCloud database. That database is Apple's and is yours: Seize cannot read it. It is why a second iPhone or iPad signed in to the same Apple Account shows the same family. iCloud Sync is on by default; you can turn it off in Parent Zone › Settings, and the change applies the next time Yaybo opens.

• your child's first name (or the nickname you choose), grade level and, if you pick one, the U.S. state (families outside the U.S. can answer "outside the U.S.");
• the answers you gave while setting up, including anything you chose to share about how your child learns;
• your child's progress, rewards, island and streak;
• recordings of your own voice that you make for your child: a high-five (up to 5 seconds) and, for School words, a word of this week's spelling list (up to 3 seconds);
• the spelling words you type;
• the choices you make in the Parent Zone, including whether Yaybo may ever listen to a child (see "The microphone"; the Read-aloud switch itself stays on the one device).

Because this stays on your devices and in your own iCloud, Seize does not collect it. Yaybo does not ask for a last name, birth date, photo, email address or any account. Yaybo uses the state you pick, never the device's location.

The microphone

Yaybo asks for the microphone only on grown-up screens, behind the grown-up gate, and never at launch. When iOS asks, it shows this message: "Yaybo uses the microphone to record the voice notes and school words you choose and, only if you turn on Read-aloud in the Parent Zone, to listen while your child reads. What your child says is never recorded or sent."

• Recording your own voice for a high-five (Parent Zone, or the linked viewer if you share with another grown-up) or for a spelling word (Parent Zone › Settings › School words). The recording stays on your devices and in your own iCloud when iCloud Sync is on, and in the shared space if you share; it is never sent to Seize.
• Read-aloud (optional, off until a grown-up turns it on in the Parent Zone, per device). When it is on, your child can read a word or a story page out loud: your device listens only during your child's turn: while they hold the talk button or, after a quick tap, until the next tap (6 seconds at most) and decides, using Apple's speech recognition (SpeechAnalyzer) on the device itself, whether it heard the word. The sound is not recorded, saved or sent, and no text of it is kept. It never marks an answer wrong: when it is not sure, Yaybo reads the word aloud and your child checks it themselves. The first time you turn Read-aloud on, iOS downloads Apple's speech model to your device; that download comes from Apple and carries none of your child's data.
• Never listen (per child). Each child has a "Never listen" switch in Parent Zone › Settings › Read-aloud. When it is on, Yaybo never opens the microphone for that child, on any device and even if Read-aloud is on, and your child taps "I said it" instead. That choice is kept with the child's profile, so it follows the child to your other devices through your own iCloud when Sync is on.

What Yaybo never collects

Last name; birth date; photos or camera; audio of your child (see "The microphone": it is processed on the device and dropped); location (Yaybo uses the state you pick, never the device's location); email address or any account; free text about your child; the advertising identifier (IDFA); App Tracking Transparency prompts. Yaybo does not track you or your child across other companies' apps and websites, and there are no chat or social features through which a stranger could reach your child.

Notifications and Apple's age category

• Notifications. Reminders go to the grown-up, not to the child, and are scheduled on your device. We run no push-notification server. Yaybo asks for permission only on grown-up screens, and you can say no.
• Apple's age category. In places where a state law asks app stores and apps to handle age (today Texas, Utah and Louisiana), Apple may tell Yaybo which age category your Apple Account belongs to. Yaybo keeps the answer in memory only, never stores it, never sends it to anyone and never uses it to change what a child sees. It is used only to decide who approves a purchase and to keep purchase analytics off a child's own device.

What leaves your device

• A note you write. Only if you open Parent Zone › Settings › Help, pass the grown-up gate and tap Send. It goes to our own server (Seize's Supabase project, Frankfurt, Germany) and carries your note, the app version and build, the iOS version, the device model and the language. No email address, no name, nothing about your child. Its text is also forwarded to a private Telegram chat that only the developer reads, where it is deleted automatically after one month (see "Notes you send us").
• An email you write. Only if you tap "Email the Yaybo team" or "Something not working?" in Parent Zone › Settings › Help (behind the grown-up gate, after a notice asking you not to include your child's name) or write to us yourself. Your email app sends it from your own address: we receive what you write, your address and, for "Something not working?", the app version, iOS version and device model that the message starts with. Yaybo sends nothing itself, and we use the email only to answer you.
• Apple Ads attribution. The first time Yaybo opens (if that attempt fails, once more at the next launch, then never) and once for each subscription it finds active on the device (a purchase, the free trial or a restore; never one shared through Family Sharing). It goes to the same server and carries Apple's anonymous attribution token (never your name or Apple Account) and, for a subscription, its original transaction number. This post is not behind the grown-up gate: it happens as the app opens, on whoever's device it is, whether or not an ad brought you; see "Where our ads came from".
• Purchase analytics. Only after a grown-up passes the gate and buys, restores or opens the subscription screen, never on a child's own device. It goes to RevenueCat, a US service provider; see "Purchase analytics (RevenueCat)" below.
• The payment. When you subscribe, handled entirely by Apple; we never see your card or your Apple Account details.

Nothing else leaves: no third-party advertising SDK, no advertising identifier, no tracking. The text of a note also reaches Telegram, described under "Notes you send us". The only other third-party service that receives anything is RevenueCat, described below.

Notes you send us

If you, the parent, write to us from the Parent Zone, we receive your note, the app version, the iOS version, the device model and the language. We do not receive your name, your email address, your child's name or anything from your child's profile. When you send us a note from the Parent Zone, its text is also forwarded to a private Telegram chat that only the developer reads, so we can read it quickly. Telegram (Telegram Messenger Inc.) is used only to deliver the note to the developer; it does not receive the app version, build, iOS version, device model or language that travel with the note. That copy is deleted from Telegram automatically after one month. Please don't include your child's full name or other personal details in the note. To limit abuse we keep a one-way hash of the date and your network address for two days; the address itself is not stored by us, though our hosting provider logs it for its standard log window. Please do not include your child's information: we delete any we find. The note sheet warns you on the device if it sees your child's name, and closes after five minutes without an edit. Notes are deleted from our server 12 months after you send them. To have a note deleted sooner, email hello@seizeapps.com with roughly when you sent it and a few words of it. We cannot answer notes sent from the app; to hear back, email us.

Where our ads came from

Apple gives every app a small anonymous token, through its AdServices framework, that says whether the install came from an Apple Ads ad. It needs no permission prompt and carries no advertising identifier. The first time Yaybo opens, it posts that token, and nothing else, to Seize's own server (once more after "Delete all data", which starts the attribution afresh). That happens as the app opens, before anything a grown-up does, because the token is only useful early; the token carries nothing about your child, and nothing a child entered is involved.

Our server passes the token on to Apple's attribution service, which answers which campaign, ad group, keyword and ad the install came from, and the country or region and date of the click. If no ad brought the install, we store nothing. If one did, we store that answer, together with a one-way hash of the token to drop a duplicate, and never the token itself. We do not receive who you are, and we do not share the token or the answer.

For each subscription Yaybo finds active on the device (a purchase, the free trial or a restore), the app also sends the App Store's purchase reference (the original transaction number), never for one shared through Family Sharing, so we can tell which keywords paid for themselves. We keep this for 12 months. It is not used to track you across other companies' apps or websites, and nothing from your child's side of the app is involved. Apple sends subscription status notifications (a start, a renewal, a cancellation or a refund) to RevenueCat, the subscription-analytics provider described under "Purchase analytics (RevenueCat)"; nothing in them identifies your child.

Purchase analytics (RevenueCat)

To understand how many families subscribe, Yaybo uses RevenueCat, a US purchase-analytics service. We use it only to record and verify subscription purchases and to count, in aggregate, how many families subscribe; never to contact anyone, build a profile or show ads. It is switched on only after a grown-up passes the parental gate and then buys or restores a subscription, or opens the subscription screen of a lapsed plan, or opens the subscription screen inside the Parent Zone (both behind that gate), and never on a child's own device. Opening the Parent Zone alone starts nothing. Once it is on, it stays on, including while a child is playing, until you close the app. When it is on, RevenueCat receives an anonymous app user ID, the device's IP address, device and OS information, the device's vendor identifier (IDFV), the App Store storefront country, an App Tracking Transparency status flag, and the purchase itself. It never receives your child's name, age, answers or progress. We do not use these for advertising, we do not track you across other companies' apps, and RevenueCat acts only as our service provider.

RevenueCat is RevenueCat, Inc. The vendor identifier is a number Apple gives the apps of one developer on a device; it is not the advertising identifier. The App Tracking Transparency flag is the device's tracking-permission status: Yaybo never asks to track, so it reads "not determined" unless you or Screen Time turned tracking off. Yaybo sets no attributes of its own in RevenueCat. RevenueCat stores this data in the United States.

Apple processes the payment. We never see your card or your Apple Account details. Apple, not Yaybo or RevenueCat, decides whether a subscription is active.

Sharing with another grown-up (optional)

If you, the parent, link another person's phone from the Parent Zone (Settings › Other phones › Link a parent's phone), Yaybo puts your child's first name, avatar choice, this week's and last week's report (counts and plain-English skill names) and any high-fives that person sends into your own iCloud, and shares that space only with the people you invite through Apple's sharing sheet. The invited person needs an iCloud account and sees a grown-ups-only view: no lessons, no purchases. We, Seize, do not receive any of it and cannot see it. You can stop sharing at any time (the same screen, "Stop sharing"), which removes the shared space; deleting a child or all data removes it too. A high-five that has been delivered to your device leaves iCloud after 14 days.

A high-five is a sticker, a phrase or a short note (80 characters at most) and, if the sender records one, a voice note of up to 5 seconds. The first time a linked phone sends one, it asks the grown-up how to sign their letters ("Sign your letters as": Mom, Dad, Grandma, Grandpa or a first name of up to 20 characters). That choice stays on that phone, each high-five carries it, and your child's screen says who the letter is from.

Without sharing, you can also send a week's report to yourself, as plain text or as a picture, with the iOS share sheet; where it goes from there is your choice, and Seize receives nothing.

Children's privacy (COPPA) and Canada

Yaybo is directed to children under 13 and is built to collect no personal information from them.

• Operator: Izotz Cristobal Mota, trading as Seize Apps, Ugarana kalea 3, piso 3, 48141 Ugarana, Bizkaia, Spain, telephone +34 672 53 17 63, hello@seizeapps.com.
• What we collect from a child: nothing. The learning data above stays on the family's devices and in their own iCloud. What reaches us is what a parent chooses to send (a note) or what Apple sends about an ad (an anonymous token, posted automatically the first time the app opens), and neither comes from the child's side of the app. The only other flow is the purchase data that reaches a service provider, described under "Purchase analytics" (including the device's vendor identifier, a persistent identifier), only after a grown-up passes the parental gate, and used only for the internal operations named there. Because RevenueCat stays on for the rest of that session, its background requests can continue while a child plays; they carry nothing about your child.
• When Yaybo contacts our server on its own: once, the first time it opens, to post Apple's anonymous ad token (see "Where our ads came from"), and once for each subscription it finds active on the device, to post the purchase reference. A note goes only when a grown-up sends one.
• When purchase analytics turns on: only after a grown-up passes the parental gate and buys or restores a subscription, or opens the subscription screen of a lapsed plan or the subscription screen inside the Parent Zone (both behind that gate). Opening the Parent Zone alone starts nothing. Never on a device a grown-up told Yaybo is the child's own, and never where Apple tells Yaybo the account belongs to a minor. The grown-up gate is how Yaybo keeps children out of grown-up screens; Yaybo collects no personal information from a child that would need a parent's consent.
• Who can reach your child: nobody you have not chosen. Yaybo has no chat, no social features, no ads and no links out that a child can open without the grown-up gate. The one exception is a high-five from a grown-up you yourself invite through the family link (see "Sharing with another grown-up"): a sticker, a short phrase or note and an optional voice note, which appears in your child's mailbox in the app. You can stop sharing at any time.
• Your rights, as a parent or guardian (and under Canada's PIPEDA and Quebec's Law 25 for families there): you can review everything Yaybo keeps for a child in the Parent Zone; you can delete one child (the child's "Delete…" menu in Parent Zone › Children) or everything ("Delete all data" in Settings, which also removes anything shared and the note on the device of which ad brought you to Yaybo), and deleting stays possible when a subscription has ended (Grown-ups › Your child's data, on the plans screen, no purchase needed); you can refuse optional features (Read-aloud and linking a phone are off until you turn them on, and you can tell Yaybo never to listen to a particular child); you can decline purchase analytics by not buying or restoring through Yaybo and by not opening the subscription screen (opening the Parent Zone alone starts nothing), and you can write to us to ask for what RevenueCat holds about your device to be deleted; you can ask us anything at hello@seizeapps.com. Please do not put your child's name in an email.
• Canada: Yaybo is offered to Canadian families in English. The grown-up screens and this page also have a Spanish translation, and there is no French version. Your information is processed in the United States and Germany by Apple, our service provider and our server host, as described above. The person responsible for privacy at Seize Apps is Izotz Cristobal Mota, hello@seizeapps.com.

Keeping and deleting data

• Your child's name, answers, progress, rewards, and your voice recordings and School words: on your devices and in your own iCloud, kept until you delete them. "Delete…" on a child, or "Delete all data", in the Parent Zone removes them from your devices and, when iCloud Sync is on, from your iCloud and your other devices too (when Sync is off, a copy already in iCloud is not touched: turn Sync on and open Yaybo first if you want it removed); a School list can also be deleted on its own. Deleting the app alone removes it from that device but leaves any iCloud copy: remove that in Settings › [your name] › iCloud › Manage Account Storage. If you back up your device (iCloud Backup or a computer), the backup may hold a copy; that backup is yours, kept by Apple under your Apple Account. Deleting your data does not cancel a subscription: that is in Settings › [your name] › Subscriptions.
• The shared report, your child's name and high-fives, if you share: in your own iCloud, shared with the people you invite, until you stop sharing (Parent Zone › Settings › Other phones › Link a parent's phone › Stop sharing) or delete; a delivered high-five leaves iCloud after 14 days.
• Notes you send us: on our server for 12 months (the copy of a note's text in Telegram is deleted automatically after one month); to have one deleted sooner, email hello@seizeapps.com.
• The ad-attribution answer and the purchase reference: on our server for 12 months; email hello@seizeapps.com to have them deleted sooner.
• Yaybo's own record that it already sent the ad token and the purchase reference: on your device, until you choose "Delete all data" (the app calls it "the note of which ad brought you to Yaybo"). It is not on our server; what is there is in the line above.
• The abuse-limit hash: on our server for 2 days, then automatic.
• At RevenueCat: we use these records only to record and verify subscription purchases and to count subscribers in aggregate, and keep them only as long as we need them for billing, refunds, support and legal records. If you ask us, we ask RevenueCat to delete the record tied to your device, and we aim to have it deleted within 30 days of your request. RevenueCat states no fixed period for how long it keeps end-user data, and deleting Yaybo does not delete what it already holds: write to hello@seizeapps.com. We do not keep this information for any other purpose or without end.

Selling, sharing and tracking

We do not sell your personal information or your child's, and we do not share it for advertising across other companies' apps and websites. Yaybo does not track you, so there is nothing to opt out of.

How we protect it

The learning data never leaves your devices and your own iCloud, which Seize cannot read. Access to our server, to App Store Connect (which Apple protects with two-factor authentication) and to the RevenueCat dashboard is limited to the named Seize developers who work on Yaybo, with two-factor authentication.

Changes

If we change what Yaybo collects, we will update this page and its date, and we will not start collecting a child's personal information without first following the notice and parental-consent rules of COPPA.

Contact

Seize Apps · Izotz Cristobal Mota
hello@seizeapps.com · seizeapps.com