This system has its pros and cons but I believe 12 month mandatory checks could pick many things if that would be rolled out nationwide.
However, there is a widespread belief that health checkups are more important in later life (e.g. after age 40) because many conditions are more likely to develop in later years.
I like the idea of general health checks available to all regardless of age, but I don't know what this means in terms of cost (presumably high).
In the UK, the NHS (National Health Service) offers a free health check to anyone aged 40 to 75 (which can be re-taken every 5 years):
Does early detection lead to fewer deaths overall? For many types of cancer it doesn't.
They had a post here a few months ago. I entered the early access but have yet to use the device and app so I cannot review them