Measuring time by the Sun, the Moon and the Stars. As the sun moves across the sky, shadows change in direction and length, so a simple sundial can measure the length of a day. It was quickly noticed that the length of the day varies at different times of the year.
PhoneClean is a software thatâs used to not only rid your iPhone of unnecessary clutter that may be slowing your device down but also does it in a safe and secure manner so you will never have to work about having your privacy invaded.
AVG AntiVirus FREE 2017 (Virus Cleaner) for Android phones and tablets also: â Defends against malicious apps, viruses, malware and spyware. â Identifies unsecure device settings and advises how to fix them. â Checks media files for malicious software and security threats.