Clip Stack is a free, open source, ad-free app to manage your clipboard comfortably and intuitively. Basically the app saves and stores all the items you manually copy to your clipboard.
When you copy a text, it first appears in your notifications bar. From there you can access a Clip Stack tab where you can edit clipboard items or save them as favorites within the app. The texts marked as favorites are always available from the notifications bar.
In case these features aren't convenient enough, Clip Stack also gives you the possibility to place a widget on your desktop. Through that widget you can select any text you've copied to the clipboard with just a tap.
Clip Stack is an outstanding clipboard manager that comes with an excellent number of quality features. Best of all, not only is it free to use, it's also free of any ads.