Thanks for keeping an eye out, Mike. Strength Club is in beta testing to be a replacement for the Starting Strength App. It's a more flexible training log that includes templates from Starting Strength, Practical Programming, and Barbell Prescription.
Mick has opened it up to paid beta testers as he finishes development, so you probably received an email because you're either a SS App user or added yourself to his mailing list at some point. We'll let Mick come up here and give more details whenever Australia wakes up.
See more info here: Post your ideas for upcoming features here