OpenKeyboard
From Android 10 the active input method is the only process permitted to read the clipboard while another app is in front. So the clipboard lives in the keyboard — and the keyboard had to be good enough to actually type on.
wss://relay.opensync.network
Already filled in. Android 10+ · iPadOS · iOS.
tap the → the a space is owed, not written
tap , → the, the debt defers
tap s → the, s and is paid hereFeatures
Not a feature bolted to one. Ambient clipboard capture is available to the active input method and to nothing else on modern Android, so shipping a background service instead would have shipped something that cannot work.
Edits are weighted by how far apart two keys physically are, and a transposition or a doubled letter costs less than an unrelated substitution — because those are the mistakes thumbs actually make, not the ones a dictionary expects.
Touches are tracked per pointer and committed in press order. A keyboard that only watches one finger drops the second every time, which does not feel like a bug — it feels like dead spots on the glass.
Pick a suggestion and the space is not typed yet — it is owed, and paid by the next character that earns it. That is why word, and what?! come out right, and why nothing trailing leaks into whatever you send.
English is compiled in; nine more download — German, Spanish, French, Italian, Dutch, Portuguese, Chinese, Indonesian and Malay. Six carry a prediction model. Indonesian and Malay ship none on purpose: below about a million tokens a model predicts its corpus rather than the language.
A personal dictionary built from your own typing, which is the part that takes correction from good to invisible — and it is stored where it was learned.
How it works
Everything that decides what your data is happens on your device. The relay holds bytes and hands them back in the right order.
01
Two buttons in the app; Android resets the default keyboard on every install, so it asks you to re-pick.
02
Ten characters from a device that already has your clipboard. No key is ever typed twice.
03
The keyboard is the active input method, so it can see the clipboard while you are in another app.
04
Or the browser, or the command line. Same history, same encryption.
Download
Every OpenSync app shares an account, a relay and an encryption model — so a second one is a checkbox, not a second signup, a second bill or a second thing to trust.
Privacy
| What | Why, or why not |
|---|---|
| What we never collect | Your keystrokes. Correction, prediction and the personal dictionary all run on the device — there is no server in the typing path at all. |
| What the relay sees | Sealed clipboard bytes, and only the ones that were not classified as secrets. Not your typing, not your dictionary, not your language packs. |
| On iPhone and iPad | Clipboard capture is asked for rather than ambient, because no iOS process may read the pasteboard in the background — ours included. Different product, same honesty about why. |
Pricing
The paid side has no price yet, and this page will say so until it does — an app that lists a plan nobody can buy has already promised something.
£0
Nothing in the keyboard itself is paid, and nothing in it ever will be — the typing is the product and it runs on your device. The only paid part is images copied to the synced clipboard, on our relay, because they are the only thing that costs storage.
Point an app at itUnmetered
What is being sold is running the server, not the feature. If you are going to end up here eventually, start here.
Run your own OpenSync relayFAQ
Because on Android 10 and later the active input method is the only thing allowed to read the clipboard while another app is in front. A background clipboard service is not a worse design — it is one that does not work.
No. Correction, prediction and the dictionary it learns run entirely on the device, and the language packs are downloaded once rather than queried. There is no server in the typing path.
That is Android's response to a keyboard that crashed, and it is also what happens every time you install an APK — the default resets. Re-enable and re-pick it, and check it is really ours before blaming anything else.
That is two fingers, not two places. A keyboard that tracks only one pointer drops every touch that lands while another is still down; this one tracks them all and commits in press order.
English is built in and nine more download: German, Spanish, French, Italian, Dutch, Portuguese, Chinese, Indonesian and Malay. Six carry a prediction model; Indonesian and Malay deliberately do not, because too small a corpus makes a model that predicts the corpus instead of the language.
Yes, with one honest difference: iOS lets no process read the pasteboard in the background, so clipboard capture there is something you ask for — a Paste key, or the share sheet — rather than something that happens.