Freelancers track hours in Toggl or Harvest - then copy them into spreadsheets to invoice clients. Olivi fixes that. Drop a CSV from any tracker - entries map to clients, group into invoices, and get emailed with PDF attached. Four clicks. Built for solo freelancers billing multiple clients: - Smart CSV import with client/project mapping. - Keep tracking of your unbilled time logs. - Email composer with templates and PDF attachments. - Per-client rates, currencies, and tax settings.