Clipboard sync is a simple idea with a lot of hidden edges. You copy an address, a code, a link, or a chunk of text on one device, and you want to paste it on another without emailing it to yourself. That is a universal clipboard, a shared clipboard across devices, and it is the feature people reach for the moment they own more than one screen.
The catch is that the tools built into your operating system do a narrow version of this, tied to one ecosystem, holding only the last thing you copied, with no history and no search. Once you understand where they stop, it is clear why a proper cross device clipboard has to be built differently.
What clipboard sync means, and why people want it
At its core, syncing your clipboard means the thing you copy on device A is available to paste on device B a moment later. Copy a Wi-Fi password on your laptop, paste it on your phone. Copy a tracking number on your phone, paste it on your desktop. The value is obvious the first time it saves you from retyping a long string across devices by hand.
The people who care most about this are the ones who live across machines all day: developers moving snippets between a laptop and a phone, support and sales folks pasting the same replies, anyone who copies a two-factor code on one device and needs it on another. For them, a clipboard that does not follow them is a small papercut repeated dozens of times a day.
The honest state of built-in clipboard sync
Every major platform ships some version of this, and every one of them is deliberately narrow. Here is what each actually does, and where it leaves you.
Apple Universal Clipboard
Universal Clipboard moves your last copied item between Apple devices signed into the same iCloud account, over Bluetooth and Wi-Fi within close range. When it works it feels magic. The limits are real: it is Apple only, it carries just the single most recent item, it has no history and no search, and it gets flaky over distance, across networks, or when Handoff has hiccuped. There is nothing to fall back on when it drops a copy. If yours has stopped behaving, our guide on why Universal Clipboard is not working walks through the usual causes.
Microsoft and SwiftKey cloud clipboard
Windows has a cloud clipboard behind Win+V, and SwiftKey offers a similar sync on mobile. Both are bound to a Microsoft account, keep only a short rolling list, and clear on restart unless sync is on. The synced copies live on Microsoft servers in a form they can access, so anything sensitive you copy passes through a place that can read it. It is a convenience buffer, not a private, permanent memory.
Chrome send to your devices
Chrome can send a page or a highlighted bit of text to your other signed-in Chrome instances. It is handy for a link, but it is a one-off push tied to your Google account and the browser, not a real clipboard history. There is no search, nothing is kept, and it stops at the edge of Chrome.
How Relic syncs your clipboard across devices
Relic treats every kept item as an encrypted object that syncs to all your devices, across Windows, Mac, Linux, iOS, and Android. It is worth being precise about which parts are live today and which are coming, because the model matters.
- Your computer does the capturing. The Windows desktop is the active client. It records what you copy automatically and syncs each kept item, encrypted, to the rest of your devices. The Mac and Linux desktop clients are in private beta and coming.
- Every device can read and search the history. On any device, including your phone, you can open the synced, encrypted history and search it instantly, including text found inside screenshots.
- Phones are a browse-and-search lens, on purpose. Android and iOS block apps from reading the clipboard in the background, which is a privacy protection. So Relic on mobile does not silently record copies. It lets you search and read your synced history, and it lets you push items up.
- You can push from a phone with the share sheet. Share something into Relic from your phone and it lands in your history, encrypted, waiting for you back on the desktop.
- It never writes to your clipboard on its own. A paste is always something you chose, never a surprise overwrite.
The realistic mental model is this: your computer captures, and every device can search and read the synced, encrypted history. That is a working copy and paste between phone and computer flow without pretending a phone can do something the operating system forbids.
Encryption is the difference
This is the part that separates Relic from every cloud clipboard tool. Each item is sealed on your device before it ever leaves, using XChaCha20-Poly1305 with a key derived from your passphrase through Argon2id. The server only ever holds ciphertext. It cannot read your clipboard, and neither can we, even if we were compelled to try.
Your clipboard is full of sensitive things: passwords, one-time codes, private messages, tokens. Syncing all of that through a server that can read it is the quiet tradeoff most cloud clipboard tools make. Relic makes the opposite one. It is the privacy model of a password manager, applied to your whole clipboard history.
Clipboard sync, compared
Here is where the common options land against each other. The built-in tools each solve one slice of the problem. The combination of a searchable history, cross-ecosystem reach, and end-to-end encryption is the gap Relic fills.
| Relic | Apple Universal Clipboard | Microsoft Cloud Clipboard | |
|---|---|---|---|
| Works across Windows and phones | |||
| Works beyond one ecosystem | |||
| Keeps a searchable history | |||
| More than the last item | |||
| End-to-end encrypted | on device | ||
| Free tier |
Universal Clipboard is encrypted on the device but never syncs to a phone that is not Apple, and it holds one item. Microsoft's cloud clipboard reaches a bit further and keeps a short list, but the copies live on servers that can read them. Relic is the one that combines every device, a history you can search, and encryption that keeps the server blind.
Where this fits with the rest of Relic
Sync is one piece of a larger idea: a clipboard that remembers everything and follows you everywhere. If you want the full picture of what a clipboard manager is and how to pick one, the main guide covers it. If you mostly care about the phone side, the Android page explains how the lens works. And since capture happens on the desktop, the Windows page shows where the recording actually takes place.
Frequently asked questions
Does clipboard sync work between Windows and Android or iPhone?
Yes, with an honest caveat about how. On Windows, Relic captures what you copy automatically and syncs it, encrypted, to the rest of your devices. On Android and iPhone, Relic is a browse-and-search lens: you can open, search, and read the synced history, and push items up from the phone using the share sheet. Phones cannot silently record every copy because Android and iOS block background clipboard access, which is a privacy protection, not a Relic limit.
Is clipboard sync secure and encrypted?
In Relic, yes. Every kept item is sealed on your device with XChaCha20-Poly1305 using a key derived from your passphrase with Argon2id. Only the ciphertext leaves your machine. The server stores scrambled bytes and cannot read your clipboard. Most cloud clipboard tools, including Microsoft's and the browser send-to-device features, do not work this way, so their servers can see your content.
Why is Apple Universal Clipboard not enough?
Universal Clipboard only moves the single last item you copied, only between Apple devices signed into the same iCloud account, and only over Bluetooth and Wi-Fi in close range. There is no history, no search, and nothing crosses to Windows or Android. When it fails, which is common, there is nothing to fall back on. We wrote about the usual causes in our guide on why Universal Clipboard is not working.
Does Relic sync everything automatically or do I pick what to keep?
On your computer, Relic captures automatically, and anything kept syncs to your other devices without extra steps. You stay in control: you can delete anything, and on a phone you choose what to push up with the share sheet. Nothing is written back to your clipboard on its own, so a paste is always something you asked for.
Does clipboard sync work offline?
Relic is local-first. Your history lives on the device and stays fully usable with no connection. Anything you copy or keep while offline is queued and syncs to your other devices once you are back online. You are never blocked waiting on a server.
What is a universal clipboard and does Relic count as one?
A universal clipboard means the thing you copy on one device is available to paste on another. Relic acts as a universal clipboard across your machines, with two differences from the built-in versions: it keeps a full searchable history instead of only the last item, and it is end-to-end encrypted so the sync passes through a server that cannot read it.
Can I share a clipboard across devices that run different operating systems?
That is the point. A shared clipboard across devices should not care whether one is Windows and another is a phone. Relic syncs the same encrypted history to every device you install it on, so a snippet copied on your Windows desktop is searchable on your Android phone, and an item you push from your phone is waiting back on the desktop.
Does the free tier include sync?
Text is the cheap part to store, so the free tier covers unlimited text and syncs it across your devices. Paid plans add more storage for heavier content like images. Pricing is kept simple: a free tier to start, paid plans when you need more room.