ClockMonkey

The app shows the digital clock both in the portrait mode and the landscape mode.  You can also use this app to count up and down numbers.  It's 100% free for use.  There is no nagging feature, and it contains no ads of any kind.

- Features -

1. Run the digital clock with options of 12 and 24 clock hours.
2. Count numbers up.
3. Keep the history of the count up numbers.
4. Save the count up number history as a text file.
5. Count down numbers.

- System requirements -

1. iOS 16.4