Terrible.

Provides less actionable, or useful data than the desktop UI, which is really saying something. Its disheartening (as a partner agency) when clients share their concerns about the app. Its perplexing why Hubspot still promotes it and expects their partners to vouch for it. Im sure improving it isnt a high priority, but perhaps a few simple tweaks?

Martin Prince about Marketing by HubSpot (Social Inbox, SEO, Contacts & Analytics)