Hey {First Name},
It’s {Your Name} on this side. How has your experience been with our app so far? I hope it was nothing but awesome. Feel free to reach out anytime if you need any help or have questions. We're here 24/7 ready to take your call.
There's a big announcement about our latest app update that we recently launched. Your favourite app has just turned 2 updates old. We've put in a ton of features that were beta tested and I'm sure they'll be great for you.
At the moment, we are planning to make it free for you. Use it and let us know what you think: feedback is essential to me and my team.
Thank you and regards,
{Your Name}