The direct answer
Salt-free conditioners generally aim to alter scale behavior rather than remove hardness.
What it can—and cannot—do
They do not produce the same measured result as ion exchange.
What determines the next step?
Compare documented performance, water chemistry, flow, maintenance and warranty scope.
Can I use an online hardness number?
Use it only as background. A current tap test is more useful for equipment selection.
Does one system solve every concern?
No. Softening, filtration and reverse osmosis perform different jobs.
What happens after I enquire?
Your source, symptoms and property information are reviewed to identify an appropriate next step.