In my experience, the reliability of free online metronomes can vary a lot, but I came across <a href="https://metronomeonline.com/metronom-online/">metronom online</a> which proved to be quite consistent in maintaining tempo. This metronome kept the BPM steady even when I switched tempos frequently, which is important for any musician needing to practice tempo changes smoothly. What I liked about metronom online is that it works well across various devices without lagging, so the tempo stays reliable whether you use a laptop or tablet. Some other free options would lose sync or produce uneven clicks after a while, but metronom online stuck to the beat firmly. It also lets you adjust time signatures easily without affecting the tempo accuracy, making it versatile for different practice needs. I think the experience depends a bit on internet speed as well, but overall, this tool made my sessions more productive. For anyone skeptical about free online metronomes, metronom online might be a solid starting point.