Name the symptom
Write one sentence describing what is happening: the drive is nearly full, an archive will not open or the computer becomes unresponsive during a particular task. Each points toward a different investigation. A general promise to optimize everything is too broad to evaluate.
Use a small baseline
Repeat the affected task and note the time, free space or behavior that matters. Check what your operating system already offers before adding software. If you try a utility, apply one relevant change and compare the same task again.
Keep the cost visible
Compare the free, trial and paid options, including renewal or license limits. Read what a cleanup action removes before approving it. Do not judge a tool only by the number of items it reports: useful results are tied to your workload and a change you can explain.