Frequently asked questions

Clock definitions, preferences, custom equations, and alarms are stored in this browser on this device. Uploaded clock-face pictures are stored in the browser's local IndexedDB storage. Analog Math Clock does not upload this information to an application account or cloud database.

Yes. Open the app online once so its files can be cached. Clocks, customization, learning mode, alarms while the app remains open, image export, and locally available backups can then work offline.

Open Analog Math Clock in Safari, tap Share, choose Add to Home Screen, and tap Add. If Open as Web App appears, turn it on before adding the app.

Open Analog Math Clock in Chrome, open the browser menu, and choose Install app or Add to Home screen.

Select Add clock, give the clock a name, and choose a time zone. Each clock keeps its own appearance, equations, sounds, alarms, and time-zone details. The first clock follows the device's local system time. Use Find a time zone to search by city, U.S. region, or abbreviation. For example, search for West Coast, Pacific, California, or PST to find U.S. Pacific time.

Every clock position has a pool of equations that equals that hour. Analog Math Clock chooses each position independently, so refreshing or selecting New equations creates a different combination instead of repeating a fixed group. In Customize, you can also replace equations with fixed binary numbers or Maya dot-and-bar numerals.

Open a clock's Customize panel and find Face numbers. Set Number style to Binary or Maya numerals. The choice belongs only to that clock, so your other clocks can continue using equations or a different numeral style.

Binary uses only 0 and 1. Reading from right to left, the positions represent 1, 2, 4, and 8 on this clock. Add the positions containing 1. For example, 1010 means 8 + 2, which equals 10. Turn on Equation learning mode to select a Binary number and see its decimal value.

On this clock, each dot represents one and each horizontal bar represents five. Add the dots and bars to find the hour: two dots above one bar equal 7, while two dots above two bars equal 12. Turn on Equation learning mode to select a Maya numeral and see its value.

Simple, Mixed, and Advanced control which mathematical equations are randomized. Binary and Maya are fixed ways of writing each hour, so equation difficulty does not apply. Your selected difficulty is preserved and becomes available again when you switch Number style back to Equations.

Yes. Open Tools, add an equation for a clock position, and optionally include a short explanation. Turn on Include my equations when randomizing to mix them with the built-in equation pools.

Learning mode makes equations, binary numbers, and Maya numerals selectable. Tap or focus a face label to see its value and an explanation. Equation explanations show the relevant rule and calculation steps, including roots, exponents, factorials, logarithms, and order of operations.

Pictures selected from your device remain in local browser storage. You can adjust their position, zoom, opacity, and readability overlay. They are included when you export a full .mathclock backup. SVG pictures are not accepted, each picture is limited to 10 MB, and all saved pictures together are limited to 50 MB.

Open Tools and select Export backup. Save the .mathclock file locally or in a cloud file service, then use Restore backup on another device. Merge adds restored clocks to existing ones; Replace recreates the backup after you confirm the destructive change. A backup can contain clock names, alarms, custom equations, settings, and private pictures, so protect it like any other personal file.

Alarms and hourly chimes are reliable while Analog Math Clock is open. Phones may suspend or stop a closed web app, so exact background alarm delivery cannot be guaranteed. Browser notifications are best-effort and require permission. Alarm and clock names are hidden in system notifications by default because those notifications may appear on a lock screen. You can change this in Tools.

On supported devices, it requests a screen wake lock while Analog Math Clock is visible. Browsers may release the wake lock when the app is hidden or the device enters a power-saving state.

Yes. Use a clock's action menu to export its face as PNG or SVG. The decorative outer clock body is not included in the current image export.

When an update has downloaded, Analog Math Clock displays A new version is available. Select Update and Restart when convenient. Locally stored clocks and preferences remain in place.

Connect to the internet and open the app in the browser. If no update notice appears, close the installed app completely, reopen the website in Safari or Chrome, and then launch the installed app again.

Use the Feedback section in Tools or open the GitHub feedback form. GitHub issues, comments, screenshots, and device details are public. Do not include personal information or attach a .mathclock backup or private clock-face picture. Send private privacy, security, or support questions to contact@analogmathclock.com.