# iCloud sync FAQ

- Product: Clastly
- Category: iCloud Sync
- Type: FAQ
- Updated: 2026-10-29
- URL: https://www.clastly.com/support/sync/how-sync-works/

Clastly uses your iCloud to automatically sync collections, records, and attachments between your devices.

## Understand what syncs and where data is stored

:::faq{q="Do I need to register to start syncing?"}
You don't need a separate email address or password for Clastly. Sign in to iCloud with the same Apple Account on your iPhone and iPad.
:::

:::faq{q="What syncs?"}
Collections, records, fields, view settings, and attached photos and files sync.

Attachments transfer separately from record information. A record may appear before its files finish downloading.
:::

:::faq{q="Where is my data stored?"}
Data is stored on your iPhone or iPad and in your iCloud. It isn't stored on the developer's servers.
:::

:::faq{q="Do photos and files use iCloud storage?"}
Yes. Photos and files attached to records are stored in your iCloud and use your iCloud storage.
:::

## Work offline and manage sync and reminders

:::faq{q="Can I use Clastly without an internet connection?"}
You can view, add, and edit content stored on your device while offline. It syncs when you connect to the internet. Downloading attachments that aren't on your device requires a connection.
:::

:::faq{q="Does Clastly have a sync button?"}
Clastly's settings don't have a button to start regular sync or a switch to turn sync on or off. If records are missing, see [Records don't appear on another device](https://www.clastly.com/support/sync/not-syncing.md).
:::

:::faq{q="Do date field reminders sync too?"}
Set reminders separately on each device. To receive reminders on another iPhone or iPad, set them up on that device too.
:::