https://www.keeper.sh/blog Product updates, engineering deep-dives, and calendar syncing tips from the Keeper.sh team. en Fri, 04 Sep 2026 00:00:00 GMT https://www.keeper.sh/blog/how-to-sync-google-calendar https://www.keeper.sh/blog/how-to-sync-google-calendar Sync Google Calendar can mean the same account on a phone, another calendar overlaid on this screen, or busy-block copies on another calendar people book. The first two are native — they can stop. Keeper.sh writes the copies overlay cannot. Tue, 18 Aug 2026 00:00:00 GMT google-calendar sync https://www.keeper.sh/blog/sync-google-calendars-between-two-accounts https://www.keeper.sh/blog/sync-google-calendars-between-two-accounts A second Google account on this Calendar UI overlays both on this screen. If that was the whole job, they can stop. Hours on account A that must exist as busy-block copies on account B still need Keeper.sh. Tue, 18 Aug 2026 00:00:00 GMT google-calendar sync https://www.keeper.sh/blog/add-google-calendar-to-outlook https://www.keeper.sh/blog/add-google-calendar-to-outlook Calendar → Add calendar → Subscribe from web overlays Google on this Outlook. If that was the whole job, they can stop. Hours that must exist as busy-block copies on the Outlook they actually use still need Keeper.sh. Sun, 16 Aug 2026 00:00:00 GMT google-calendar outlook sync https://www.keeper.sh/blog/apple-calendar-not-syncing https://www.keeper.sh/blog/apple-calendar-not-syncing When Apple Calendar looks right but Google, Outlook, or another signed-in iCloud calendar stays empty, use Keeper.sh to write private busy-block copies onto the calendar that actually needs them. Sun, 16 Aug 2026 00:00:00 GMT apple-calendar icloud troubleshooting https://www.keeper.sh/blog/best-shared-calendar-for-couples https://www.keeper.sh/blog/best-shared-calendar-for-couples The best shared calendar for couples depends on whether you're both on iPhone, both on Google, on mixed platforms, or want to share availability without event details. Here's the trade-off each setup makes. Sun, 16 Aug 2026 00:00:00 GMT sharing privacy recipe https://www.keeper.sh/blog/google-calendar-not-syncing-with-iphone https://www.keeper.sh/blog/google-calendar-not-syncing-with-iphone Diagnose why Google Calendar is not syncing with your iPhone: the Calendars toggle, Fetch New Data, Google's Calendar sync page, and when to use Keeper.sh for busy-block copies Settings cannot write. Sun, 16 Aug 2026 00:00:00 GMT google-calendar icloud troubleshooting https://www.keeper.sh/blog/how-to-add-google-calendar-to-iphone https://www.keeper.sh/blog/how-to-add-google-calendar-to-iphone Settings → Calendar Accounts → Add Account overlays Google on this iPhone. If that was the whole job, they can stop. Hours that must exist as busy-block copies on signed-in iCloud, Outlook, or another Google still need Keeper.sh. Sun, 16 Aug 2026 00:00:00 GMT google-calendar icloud sync https://www.keeper.sh/blog/how-to-merge-calendars https://www.keeper.sh/blog/how-to-merge-calendars Merging calendars means three different things. Compare overlaying, subscribing, and syncing, with the exact click paths for Google and Outlook and how fast each updates. Sun, 16 Aug 2026 00:00:00 GMT google-calendar outlook sync https://www.keeper.sh/blog/how-to-share-google-calendar https://www.keeper.sh/blog/how-to-share-google-calendar Google's Add people and groups is enough when they only need to look or edit. For busy-block copies on a calendar they already use — without See event details, without a public calendar — connect the Google calendar in Keeper.sh. Sun, 16 Aug 2026 00:00:00 GMT google-calendar sharing privacy https://www.keeper.sh/blog/how-to-share-iphone-calendar https://www.keeper.sh/blog/how-to-share-iphone-calendar Connect your iCloud calendar in Keeper.sh and send busy-block copies onto the Google or Outlook calendar colleagues already open. If they can only subscribe, hand them a times-only Keeper.sh iCal feed. Sun, 16 Aug 2026 00:00:00 GMT icloud apple-calendar sharing privacy https://www.keeper.sh/blog/how-to-share-outlook-calendar https://www.keeper.sh/blog/how-to-share-outlook-calendar Outlook's Share calendar is enough when they only need to look or edit. For busy-block copies on a calendar they already use — without dumping titles, including outside the org — connect the Outlook calendar in Keeper.sh. Sun, 16 Aug 2026 00:00:00 GMT outlook sharing privacy https://www.keeper.sh/blog/how-to-sync-apple-calendar-to-google-calendar https://www.keeper.sh/blog/how-to-sync-apple-calendar-to-google-calendar Adding Google to Apple Calendar is the wrong direction. A public iCloud link is read-only. Here is how Apple events become busy-block copies on Google. Sun, 16 Aug 2026 00:00:00 GMT apple-calendar google-calendar sync https://www.keeper.sh/blog/how-to-sync-outlook-calendar-with-google-calendar https://www.keeper.sh/blog/how-to-sync-outlook-calendar-with-google-calendar A subscribed feed in Google is not a busy event. Export is a snapshot. OGCS stops when the PC sleeps. Here is the unattended copy of Outlook hours onto Google Calendar. Sun, 16 Aug 2026 00:00:00 GMT outlook google-calendar sync https://www.keeper.sh/blog/outlook-calendar-not-syncing https://www.keeper.sh/blog/outlook-calendar-not-syncing Same-account Outlook resync — Clear Offline Items, Update Folder, Reset Account — can stop. Hours on Google, signed-in iCloud, or another tenant still need Keeper.sh busy-block copies onto the Outlook calendar they actually use, or the reverse. Sun, 16 Aug 2026 00:00:00 GMT outlook microsoft-365 troubleshooting sync https://www.keeper.sh/blog/sync-google-calendar-with-icloud https://www.keeper.sh/blog/sync-google-calendar-with-icloud Adding Google in Settings only overlays it in Calendar.app. A subscribed ICS is pull-only. Export is a snapshot. Here is the unattended copy of Google hours onto iCloud. Sun, 16 Aug 2026 00:00:00 GMT google-calendar icloud sync https://www.keeper.sh/blog/sync-google-calendar-with-outlook https://www.keeper.sh/blog/sync-google-calendar-with-outlook A subscribed Google feed in Outlook is not a busy appointment. Import is a snapshot. OGCS stops when the PC sleeps. Here is the unattended busy-block copy. Sun, 16 Aug 2026 00:00:00 GMT google-calendar outlook sync https://www.keeper.sh/blog/how-to-give-claude-access-to-your-calendar-mcp https://www.keeper.sh/blog/how-to-give-claude-access-to-your-calendar-mcp Connect Claude to every calendar you use through one MCP endpoint. Google's Calendar MCP and nspady only see Google; keeper.sh holds the calendars that cross providers. Fri, 14 Aug 2026 00:00:00 GMT mcp claude how-to google-calendar calendar https://www.keeper.sh/blog/what-an-ai-agent-can-do-with-your-calendar https://www.keeper.sh/blog/what-an-ai-agent-can-do-with-your-calendar A capability-by-capability walk through the 14 tools Keeper.sh's MCP server gives an assistant: the prompt you would type, the call it makes, and what comes back — reading Google, Outlook, iCloud, Fastmail and CalDAV in a single call. Fri, 14 Aug 2026 00:00:00 GMT mcp claude calendar guides https://www.keeper.sh/blog/how-calendar-sync-actually-works https://www.keeper.sh/blog/how-calendar-sync-actually-works A year of building a calendar sync engine, written up: how a change gets noticed, what happens when two mirrored calendars feed each other, and why deleting an event is the hard part. Tue, 11 Aug 2026 00:00:00 GMT calendar sync caldav engineering https://www.keeper.sh/blog/open-source-calendar-sync https://www.keeper.sh/blog/open-source-calendar-sync The self-hostable projects people reach for when they want calendars in sync, grouped by what they actually do, with licences and release dates taken from each project's own repository. Tue, 11 Aug 2026 00:00:00 GMT open-source self-hosting caldav sync https://www.keeper.sh/blog/sync-fastmail-calendar-with-google-calendar https://www.keeper.sh/blog/sync-fastmail-calendar-with-google-calendar Put your Fastmail events on your Google calendar so nobody books over them. Covers the Fastmail app password, both connection screens, how much detail crosses over, and what never does. Tue, 11 Aug 2026 00:00:00 GMT fastmail google-calendar sync calendar https://www.keeper.sh/blog/sync-fastmail-calendar-with-outlook https://www.keeper.sh/blog/sync-fastmail-calendar-with-outlook Get your Fastmail events showing up in Outlook or Microsoft 365 with Keeper.sh: the app password to make, what to click, and who can see your event titles. Tue, 11 Aug 2026 00:00:00 GMT fastmail outlook microsoft-365 sync https://www.keeper.sh/blog/sync-icloud-calendar-with-outlook https://www.keeper.sh/blog/sync-icloud-calendar-with-outlook Connect your iCloud calendar to Outlook with Keeper.sh so personal commitments block time at work. Covers the Apple app-specific password and exactly how little your coworkers see. Tue, 11 Aug 2026 00:00:00 GMT icloud apple-calendar outlook sync guides https://www.keeper.sh/blog/sync-nextcloud-calendar-with-google-calendar https://www.keeper.sh/blog/sync-nextcloud-calendar-with-google-calendar Copy events between a Nextcloud calendar and Google Calendar with Keeper.sh: what to click, who can see your event titles, and how fast changes land. Tue, 11 Aug 2026 00:00:00 GMT nextcloud google-calendar sync self-hosting https://www.keeper.sh/blog/sync-nextcloud-calendar-with-outlook https://www.keeper.sh/blog/sync-nextcloud-calendar-with-outlook Get your Nextcloud events onto an Outlook or Microsoft 365 calendar. Covers the URL to paste, app passwords and two-factor, tenant consent, how much detail crosses over, and what never does. Tue, 11 Aug 2026 00:00:00 GMT nextcloud outlook sync calendar self-hosting https://www.keeper.sh/blog/sync-radicale-with-icloud-calendar https://www.keeper.sh/blog/sync-radicale-with-icloud-calendar Connect a self-hosted Radicale calendar server to iCloud with Keeper.sh: server addresses, the private-network setting that catches self-hosters, and what the copies look like. Tue, 11 Aug 2026 00:00:00 GMT radicale icloud self-hosting sync https://www.keeper.sh/blog/why-i-built-an-open-source-calendar-syncing-tool https://www.keeper.sh/blog/why-i-built-an-open-source-calendar-syncing-tool $5/month flat, however many calendars you have. Keeper.sh blocks the same time on Google, Outlook, iCloud, Fastmail and CalDAV — details stripped by default. Sun, 28 Dec 2025 00:00:00 GMT calendar product sync self-hosting