<b>NOTE:</b> This app is no longer maintained (its repo was archived). https://f-droid.org/packages/net.nurik.roman.dashclock extension that displays the number of unread emails from https://f-droid.org/packages/com.fsck.k9, from your choice of accounts. Marking messages as read in K-9 won't reliably update the unread count if you are using v4.201 of K-9 — current versions of K-9 should work fine.