JJY Simulator vs AtomicClock

日本で市販されている電波時計をiPhoneで合わせるユーティリティです。 日本の電波時計の基準局(JJY)で使用される標準電波を模擬した信号を、13.3kHzの音声として出力し、3倍高調波(40kHz)を利用して時刻を合わせます。 1. イヤホンをiPhoneのイヤホンジャックに接続し、電波時計のすぐそばに置きます。 2. 音量を最大に設定します。 3. 「音声信号を出力」をオンにします。 4. 電波時計を強制受信モードにし、時刻が合うまで数分間待ちます。

Check precise NTP reference time at a glance. AtomicClock helps you set watches, wall clocks, cameras, and other devices, compare local time with UTC, and follow moments when every second matters. Clear analog and digital time AtomicClock displays current time from NTP servers that reference atomic clocks. Choose a predefined server or add your own, then view local or UTC time in a clean analog or digital clock. Customize your reference clock • Switch between 12-hour and 24-hour time • Customize the time format • Choose from multiple clock faces and hands • Use a smooth, fluid second hand • Add acoustic ticking or the Greenwich Time Signal • Tap the screen to hide information and controls, freeze the display, or mute ticking Details for precise time checks View technical NTP information, including round-trip time and server stratum. Whether you are checking a timestamp, preparing a camera, aligning a wall clock, or setting a watch by hand, the seconds remain clear and easy to follow. AtomicClock is free to use. AtomicClock Pro is available as a one-time purchase with no subscription. It unlocks your preferred clock face, hands, and font, removes ads, and includes upcoming Pro features. AtomicClock displays NTP reference time for comparison and does not change your device’s system time. Results can vary with the selected server, network conditions, and device behavior.