Hello! Yes, there is a referral code that you can use if you want:
https://actifit.io/signup?referrer=kenny-crane
I find that the app helps motivate me to walk every day. I cycle and lift weights but they don't register on the app as well as simple walking, for me. I wish you well in your aftifit journey and if you have any questions, please consider asking me and I'll try my best to give you an answer.
Keep moving; be well! :)