TaoTeChing/DaoDeJing is the ancient text of Laozi.
This reader only provides Traditional Chinese since the app author is not capable of providing proper translation of Laotsu/Laozi ancient text. If the reader is interested in translation, please search bookstore and there will be plenty.
Instead, this app provides different version of TaoTeChing/DaoDejing texts that are recorded by different ancient figures/scholars/believers/practitioners in the history.
Even in the history of China, there are many school of Taoism scholars/believers interpret and record the text differently.
The best way to understand TaoTeChing/DaoDeJing is to learn from its original text.