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Ontime is an open-source, browser-based time-keeping application developed by Carlos Valente that is purpose-built for live event professionals who need to coordinate complex rundowns, schedules, and cues from a single interface. Now at version 4.6.0, the program has evolved through three major releases to deliver a lightweight yet powerful tool that runs equally well on Windows, macOS, or Linux machines, presenting its controls and timer displays through any modern web browser so that stage managers, show callers, and technical directors can access synchronized timing from laptops, tablets, or phones without installing additional clients. Typical use cases range from theatrical performances and corporate presentations to broadcast studios and e-sports tournaments, where a minute-accurate rundown and real-time cue triggers are critical; operators can pre-load entire show flows, attach planned and actual durations to every entry, roll timers automatically or manually, and fire cues that send HTTP or OSC commands to lighting desks, video servers, or sound consoles. The software supports multiple simultaneous views—clock, countdown, count-up, and segment progress—so that different departments can monitor only the information relevant to them, while a backstage mode keeps performers informed of remaining calls without exposing technical notes. Because the project is released under an open-source license, technical teams can audit the code, contribute improvements, or self-host the backend on local machines for fully offline operation, a feature often required in secure venues. The current 4.6.0 build refines the playlist editor, adds MIDI input for external timecode, and improves WebSocket latency for sub-second cue delivery. Ontime is available for free on get.nero.com, with downloads provided via trusted Windows package sources such as winget, always delivering the latest version and supporting batch installation alongside other applications.
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