Klax Follow‑Up Email Marketing

Highly recommended. I needed this app for sending out review requests retroactively and it turned out to be a perfect tool for that purpose. There was a minor issue regarding my quota and when I sent them a message, the CEO, Michael responded me personally in a short time despite holiday, he was extremely helpful and EVEN extended my quota until they work things out. How GENEROUS is that? So I'd definitely recommend this app, 5/5! :)