Support

Last updated 1 September 2026

One person builds Core5, and the same person answers the email. There is no ticket queue and no bot in the middle.

Write to us

contact@core5app.com — for anything about using the app, a bug, or an idea. Expect a reply within a working day.

privacy@core5app.com — for your data: a copy of it, a correction, or deleting it.

What helps when reporting a bug

• What you did, what happened, and what you expected instead.
• Which device, and roughly when it happened — the app keeps a local log and the timestamp is often enough to find the cause.
• A screenshot if it is something you can see. Cover anything private.

Common answers

My Google account keeps asking to reconnect

Usually a token that expired while the Mac was asleep. Opening the app is normally enough; if it keeps asking, disconnect and reconnect that account in Settings → Account.

Something I changed on my phone is not here

Core5 syncs through your account and through Google. Both are quick, but a device that has been offline catches up when it wakes. If a change is more than a few minutes late, tell us the exact item and the time.

Can I use Core5 without connecting Google?

Yes. Tasks, Projects and Focus work entirely on their own. Calendar and Mail are windows onto your Google account, so those two need it.

Is there a Windows or Android version?

No, and none is planned. Core5 is native to Apple, which is a large part of why it feels the way it does.