This app can help you learn the writing systems of Hyrule! Practice tracing each one until you're familiar-- then quiz yourself on the letters!
Currently, the Sheikah and Hylian writing systems are available! The version of Hylian available is the one seen in Breath of the Wild.
The writing systems will include: Sheikah, Hylian (across various generations), Gerudo, and Zonai when it is deciphered!
It will also include Hiragana and Katakana to help those learning the older Hylian scripts.
Sheikah is the language used predominately by the Sheikah in Breath of the Wild and Hyrule Warriors: Age of Calamity.
The Sheikah language is found on Sheikah architecture and artifacts, such as inside Ancient Shrines It functions mainly as a cipher of the Latin alphabet, with a few inconsistent and demonstrably optional exceptions. These exceptions include the use of full stops to separate sentences, and a hyphen between some phrases.
The Sheikah language is systematically linear and angular in form, as all characters fit within an invisible, uniformly square shape. Because of this, it does not appear to thematically borrow from any known script. The Sheikah seems to be foreign to Hylians, who instead use the Hylian Language.

The Hylian writing system that appears in A Link Between Worlds, Tri Force Heroes, and Breath of the Wild is a modified form of the Sky Era alphabet. Both alphabets share some symbols while others are very similar. Several letters in this alphabet map to the same Hylian characters, namely D and G, E and W, F and R, J and T, and O and Z.
Writing appearing in Lorule uses an inverted, but otherwise identical alphabet.