How Cubby protects your family's health data: no ads, no tracking, no selling
Think about what goes into a baby log. The exact time your newborn last fed and for how long. The medicine you gave at 3am and the dose. The weight gain your doctor is watching. The vaccine record that follows your child through childhood. This is some of the most personal data a family generates. It is health data, developmental data, behavioural data, all rolled into one place.
It is also commercially valuable. Parenting is one of the most-targeted verticals in digital advertising. Many apps in this space are free because they are funded by advertising, which means the data you generate, or the behavioural signals it produces, feeds into ad targeting systems. You may not see it happening. It is written into the business model.
Cubby is built differently. Here is exactly what that means.
What is in the baby log
A fully used Cubby log contains feeds (type, amount, duration), nappy changes, naps, medicines with dosage and timing, weight and height measurements over time, developmental milestones, and your baby's vaccine history. If you are tracking a pregnancy too, it includes symptoms, scan dates, and week-by-week updates. This is not abstract user data. It is the daily health record of a small child and the people caring for them.
The sensitivity is not hypothetical. Feed timing patterns can signal feeding difficulties. Medicine logs show what conditions are being managed. Growth charts track development against clinical norms. If this data were fed into advertising platforms, it could surface targeted content about infant health products, formula, supplements, or medical services during moments when parents are tired, anxious, and looking for answers. That is the business model Cubby is choosing not to run.
What Cubby does not have
There is no Google Analytics on Cubby. No Meta (Facebook) pixel. No advertising network trackers of any kind. No third-party analytics scripts that observe your behaviour and report it somewhere else. When you open Cubby and log a feed, that interaction is not a data point in an external platform.
The fonts are self-hosted. This is a small detail that matters: many websites load fonts from Google Fonts, which means a request goes to Google's servers every time a page loads. That request carries your IP address and device information. Cubby serves its fonts from the same origin as the app itself, so there is no font CDN call leaving your session.
There are no analytics pixels. Not reduced ones. Not anonymised ones. None.
What that means practically
Your baby's feed times are not signals in an ad platform. Your medicine logs are not used to build a health profile for targeting. Your circle members' activity is not aggregated and sold. The browsing you do inside Cubby is not tracked across the web.
When you use Cubby, your data goes into Cubby's infrastructure and stays there. The people who can see it are you and the family circle members you have chosen to invite.
How Cubby stores your data
Your data is stored in Google Firestore, a cloud database. It is worth being clear about what this means. Firestore is a data storage layer: Google hosts the database infrastructure. This is separate from Google's advertising business. Firestore does not give Google access to your Cubby data for advertising purposes.
Cubby's Firestore rules enforce that only authorised circle members can read your family's data. Someone who is not in your circle cannot access your baby's logs, even if they knew the URL or your account details. The access controls are set at the database level, not just the application level.
The family circle and privacy
Privacy in Cubby works from the inside out. You build a circle: your partner, a parent, a nanny, whoever is genuinely part of your baby's care. People in the circle can see the logs. People outside the circle cannot. There is no public feed, no community feature, no social sharing by default.
This matters because family health data is not just personal to you. It is personal to everyone in it. The circle model means you decide who is in and who is out, and that decision is enforced at the data layer.
How Cubby is funded
Cubby's business model is straightforward: core features are free, and a Pro tier adds premium features for a subscription fee. Cubby Pro includes keepsake story cards and a doctor visit PDF export. The subscription is what funds the service. Your data is not the product and your attention is not for sale.
This is not an accident. It is a deliberate choice about what kind of company Cubby is. Ad-funded services are structurally incentivised to maximise engagement and harvest data. A subscription model is structurally incentivised to make the product genuinely useful to the people who pay for it.
An honest note
Cubby is a startup. The privacy promise described here is kept by the team that built it. It is not enforced by law in any single jurisdiction, and it is not independently audited by a third party. If anything about this changes, we commit to communicating it clearly and in advance, not buried in a privacy policy update that goes unread. You deserve to know before anything changes, not after.
Frequently asked questions
Does Cubby use Google Analytics?
No. There is no Google Analytics, no Meta pixel, and no third-party analytics scripts on Cubby. Your usage data stays inside Cubby's own infrastructure.
Can I see what data Cubby holds about my family?
Yes. Everything Cubby holds about your family is visible in the app. If you want to export or delete your data, contact the Cubby team directly. There are no hidden profiles or shadow records.
Who can see my baby's health data in Cubby?
Only the people you explicitly invite to your family circle. There is no public feed, no community timeline, and no external access. Cubby's Firestore rules enforce circle-only access at the database level.
Does Cubby sell data to third parties?
No. Cubby does not sell your data and does not share it with advertising platforms. Cubby is funded by subscriptions, not advertising. Your data is not the product.
What happens to my data if I delete my Cubby account?
Your data is removed from the system. Cubby does not retain your family's health records after you leave. Contact the team to request deletion at any time.
Your data stays yours
No ads. No trackers. Your family's health data in one private place.
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