A shared device remembers more than one person expects.
A family tablet or a household laptop is convenient precisely because it is shared, one device, several logins, everyone borrowing it for whatever the moment needs. The trouble is that convenience and separation pull in opposite directions, and most shared devices default toward convenience: one browser left signed in, one messaging app open on someone else's account, one photo stream synced to everyone at once.
None of this happens through carelessness so much as through defaults nobody thought to change. A device set up once, for the whole family, tends to stay exactly as configured on day one, long after the reasons for that original setup have changed.
Separate user profiles, where the device allows it.
Most Android tablets and Windows laptops support genuinely separate user profiles, each with its own apps, browser history and login state, switchable from a lock screen menu without needing a full sign out. Setting one up under Settings, Users, or the equivalent menu, takes a few minutes and is the single most effective fix available, since it keeps accounts apart at the operating system level rather than relying on everyone remembering to log out of everything each time.
Apple's tablets are more limited here, built around a single primary user by design, which makes the browser and app level habits below more important on an iPad shared across a household than on an equivalent Android device.
Browser tabs and saved logins.
A browser left signed into a personal account is the most common leak on a shared device, since a tab opened days ago can still be sitting there when someone else picks the laptop up for something unrelated. Separate browser profiles, covered in more detail elsewhere, or at minimum a private or incognito window for anything you would rather not have remembered, closes most of this gap on a device that cannot offer full separate user accounts.
Saved passwords deserve the same glance. A browser that offers to save a login is quietly building a list that anyone using the same profile can potentially see or use, which matters more on a device several people share than on a phone that stays in one pocket.
Photo streams and shared albums.
Family sharing features are genuinely useful and genuinely leaky in the same breath. A shared photo library set up for holiday snaps and birthday parties can, depending on how it was configured, mirror every photo taken on a connected phone, not only the ones deliberately added. Check which albums are actually shared, under the photos app's own sharing settings, rather than assuming a personal camera roll and a family album are as separate as they sound.
The same caution applies to a synced contacts list or a shared calendar tied to a family account, both of which can quietly carry more detail onto a shared screen than the person who added the entry intended.
Purchase history and app store accounts.
Family sharing plans that pool app purchases and subscriptions under one organiser account carry a side effect worth knowing: the organiser can typically see the family's shared purchase history, and depending on the platform's settings, approve or view what other members buy or download. This rarely matters for an ordinary app purchase, but it is worth remembering before assuming a download on a shared device is invisible to everyone else on the same family group.
Streaming accounts shared across a household raise a smaller version of the same point, since a viewing history or a list of downloaded titles sometimes sits under one shared profile rather than a genuinely separate one per person. Setting up individual profiles within a streaming account, where the service allows it, keeps recommendations and history reasonably separate without needing a second subscription entirely.
A short checklist before handing the device over.
Before a tablet or laptop goes back to the shelf or the kitchen counter, a quick check covers most of what matters: no browser signed into a personal account that should not be, no messaging app left open on a screen anyone might glance at, and any private browsing tab closed rather than left minimised. It takes under a minute once it becomes habit.
How it fits around a booking.
Even a couples booking planned together for an evening in Amsterdam West is worth confirming from your own phone rather than the household laptop, since a companion filed under slim or curvy is booked through one private thread either way, not through whichever screen happened to be nearest at the time. The habits above earn their keep on any device the wider household actually shares, quite apart from anything either partner books, and a little more so once a laptop stops being the only screen a confirmation might briefly cross. The booking page sets out what that thread needs to hold.