Individual developers sometimes host their own apps or "beta" versions on personal servers. Using a service like DynDNS allows them to share a simple link for others to download their work.
Are you trying to Dynamic DNS for an Android server, or mysk2.dyndns.org DNS Records - ViewDNS.info mysk2 dyndns org 3 download android
To use a DDNS service effectively on mobile, you might need a dedicated client app from the Google Play Store to update your phone's IP if it is acting as the server. Is it Safe to Download? Individual developers sometimes host their own apps or