Wevito's Daily Reports, which offers a 30-day free trial followed by a US$4.99 one-time payment for lifetime service, scrapes iTunes on your behalf and sends daily email updates to you.
To make this work, you entrust Wevito with iTunes Connect credentials. Admittedly, you do not have to pass along your primary password.
You create a team member with access only to sales data. Visit the iTC site > Manage Users > iTunes Connect User, and add a new user. Limit that person's role to Sales.
This is a pretty standard practice for nearly any application or service that uses iTunes Connect data.
Next, sign up at the Wevito site, providing the iTunes Connect user name, password, vendor ID and contact email.
Each day, the automated system generates a spreadsheet listing products, units moved, revenue per unit and total revenue. Wevito plans to add support for update statistics but cannot provide iAd revenue data due to Apple API limitations.
Upon visiting the page today, I still did not see the encrypted connection confirmation in the Safari address bar that I expected to and I don't see any guarantees about the level of protection on my data. This site is clearly a work in progress and Eisenman seems both friendly and responsive to feedback from users.
Update: Dev reports that the site is now updated with enhanced security and will display the proper certificates in Safari.