Although Cytus II is a music game app launched by Rhea several years ago, it has been updated all the time, which is why it still has a nearly perfect score. With Cytus II 4.0 version officially on the shelves, Raya also announced a limited-time free download event earlier, which is available on both iOS and Android platforms. Friends who have not collected this music game masterpiece before, don’t miss this rare opportunity.

Cytus II Dual Platform Limited Free Promotion Introduction
Now after entering the Cytus II store page of the App Store or Google Play, you will see that the price has changed to free. The official does not say how long it will be free, so it is recommended to get it as soon as possible and save it. You do not have to download it immediately to play:

This time, the latest 4.0 version of Cytus II has added free music, adding more than 5 songs to the Vanessa character, and also launched a new character “Ilka”, which contains a total of 10 songs, as well as “OS Timeline system addition – organize the plot through the version number/timeline system to get a new story experience”, “New chart difficulty addition – add difficulty that is not included in the score calculation.”
After opening the game, a variety of characters will appear on the homepage for you to choose from. Each character has its own music, ranging from English, Japanese, electronic music, rock to classical music, etc.:

There are already a lot of free songs, but if you feel they are not enough, you can also purchase other songs you are interested in:

The gameplay is very simple. Different types of circles will appear on the screen, such as: click, long press, or need to be followed by sliding. When the rhythm point is reached, the horizontal white line on the screen will be exactly on the circle, and you have to perform actions at this time. The more accurate you are, the higher the score you will get:
For novices, I personally recommend starting with the easy ones, because difficulty and confusion are really difficult, and your rhythm and hand speed must be fast enough:

It will be clearer if you watch the official video introduction:
Source: KOCPC Chinese