How Does Mochi Store and Sync My Data?

Mochi uses a local-first model: your notes and flashcards are stored on your own device, and syncing happens when you are online. According to the Mochi website, "Your data is stored safely on your device and syncs seamlessly when you're online." That means the app is designed to keep working from local data first, rather than depending on a constant connection to a server.

What "local first" means in practice

Local first is an architecture choice, not just a privacy slogan. In Mochi's case, the website describes two connected behaviors:

• Local storage: Your data lives on the device where you use Mochi.
• Online sync: When a connection is available, that data syncs so your cards stay consistent across the platforms you use.

Mochi is available for Mac, Windows, Linux, iOS, and Android, and can also be tried online. The local-first design is presented as the reason your data stays available on your device while still moving between devices through sync.

Why local-first matters for privacy and offline use

The main practical benefits follow directly from storing data locally:

Privacy

Because the primary copy is on your device, your notes are not dependent on a remote account to exist. The website frames this as data being "stored safely on your device." It does not describe the encryption model, server locations, or what sync servers can see, so those details should not be assumed.

Offline use

A local-first app can be used without a live connection because the data is already present. Mochi's phrasing — data stored locally, syncing "when you're online" — implies you can keep working offline and let sync catch up later. The site does not document conflict resolution or what happens if two devices edit the same card offline, so treat that as an open question rather than a guaranteed behavior.

What the website does and does not tell you

How to think about choosing this model

If your priority is keeping a working copy of your study material on your own machine and being able to review cards without a connection, Mochi's local-first design matches that need. If your priority is a fully documented sync and encryption policy — for example, for sensitive professional notes — the website excerpt does not provide enough detail to confirm those guarantees, so you would need to check Mochi's docs or forums before relying on it.

For most learners using Mochi for vocabulary, notes, and spaced repetition, the local-first plus online-sync combination is the core of how the app keeps your data both safe on-device and available across devices.