https://ngs.io/tags/shiomi/Recent content in Shiomi on Atsushi NagaseHugoenTue, 28 Jul 2026 08:00:00 +0900https://ngs.io/2026/07/28/shiomi/Tue, 28 Jul 2026 08:00:00 +0900https://ngs.io/2026/07/28/shiomi/<p>I&rsquo;ve released <strong>Shiomi</strong>, a tide chart app that runs on iPhone / iPad / Mac / Apple Vision Pro / Apple Watch. &ldquo;Shiomi&rdquo; (潮見) is Japanese for &ldquo;tide watching&rdquo;.</p> <p>It&rsquo;s free, with no ads and no in-app purchases.</p> <p><a href="https://apps.apple.com/app/shiomi-simple-tide-chart/id6754582175">App Store</a> / <a href="https://shiomi-app.ngs.io/">Website</a></p> <h2 id="what-makes-it-different">What makes it different</h2> <p>Unlike most existing tide apps, Shiomi downloads the harmonic constants for a location — the parameters of the tidal constituents at that latitude and longitude — and stores them in the app. Tide predictions are then computed entirely on device, with no network requests, so it stays fast and responsive offline or out in the field with poor reception.</p>