Based on our record, Duck DNS seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
If a changing public IP is the problem, take a look at duckdns. Source: over 1 year ago
Why don't you use Dynamic-DNS like https://duckdns.org and have the pi send your IP to the DDNS with script automated to run every 30 mins in crontab. That way you don't need anything like what you talked about and your DDNS would update from the very same pi that you are running the pi on! Source: almost 3 years ago
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No-IP - Dynamic DNS and Managed DNS Provider
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