SecondsClock app
SecondsClock is Theming tool that is open source under the GPL-3.0-or-later license. SecondsClock enables you to show a clock with seconds as a home screen widget or as a full screen night clock with dimming in low light.Features:
* No Ads.
* No requests for donations or in-app purchases.
* Fully configurable.
* Adjusts text size to make use of available space.