Chrono

At a glance

• Editor score
  7.3 / 10
• Pricing
  Free plan
• Best for
  Open-source users wanting a full clock toolkit
• Free plan
  Yes
• Paid from
  None
• Wake-up challenges
  Yes
• Facts checked
  3 Oct 2026

• Where it wins

  • Schedules alarms by weekday, date or date range, with configurable sound and snooze
  • Can require math, text retyping or sequence tasks to dismiss alarms
  • Combines world clocks, multiple timers and stopwatch lap history

• Where it doesn't

  • The project cautions users to test reliability before relying on critical alarms
  • Focused on Android rather than a cross-platform clock experience
  • Community support may not suit users seeking direct vendor support

Our verdict on Chrono

Chrono brings alarms, world clocks, timers and a stopwatch together in an open-source Android app. Its flexible scheduling and optional dismissal challenges suit solo users who want more control than a basic repeating alarm, while the bundled timing tools can replace several separate clock utilities. It is a practical fit for people comfortable with community-supported software; anyone depending on an alarm for a critical appointment should approach it cautiously.

Alarm schedules cover daily, weekly, selected weekdays, specific dates and date ranges. Users can configure ringtone, rising volume, vibration and snooze behavior, and some alarms can require solving math problems, retyping text or completing sequence tasks before dismissal. Those options give Chrono a useful range for different wake-up routines. The project describes the app as a work in progress and advises testing reliability before relying on it for critical alarms, so users who need a dependable backup or stronger reliability assurances should consider another option.

The toolkit extends beyond waking: world clocks offer city search and relative time differences, timers support presets and configurable sounds, and the stopwatch keeps lap history with lap comparisons. Customizable color and style themes let users adjust the appearance. Chrono is distributed free as open-source software, with community support. That combination makes it appealing to Android users who value an open project and want multiple clock functions in one app, but it is less suited to people who need sleep tracking, wearable support or direct support channels.

Your product? Our editors can test Chrono in depth and publish a review, labelled as paid · from $99/mo →

Chrono pricing

Chrono fact sheet

Alternatives to Chrono

• GCGoogle ClockA free Android clock for recurring alarms, timers, world times and bedtime sounds.9.2
• SCSleep CycleA free-to-start sleep tracker pairing a 30-minute smart-wake window with nightly analysis.8.8
• AAaka AlarmA free, open-source Android alarm with noise-based smart wake and simple controls.7.9

See all Chrono alternatives →

Featured on iTechGuides

Chrono is listed in our Android Alarm Clock Apps directory. Add the badge to your site — it links back to this page.

<a href="https://www.itechguides.com/products/chrono/"><img src="https://www.itechguides.com/best/badge/chrono.svg" alt="Featured on iTechGuides" width="230" height="46"></a>

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. How we rank.

Last updated 21 Oct 2026 · How we research and update