BirdlearnSmak is a grammar sentence app that allows you to check your sentence correction knowledge. the app has two types of objects, the first is the sky bird and the second is the sea bird which you can pick from the main app screen. that thereafter picking up your object from two options from the main app screen, the app will show you the sentence list where you need to pick any sentence. after that, it will show you a sentence and you need to tap on the wrong word used in the sentence after finding it, It will show you the option to replace the word with the correct word to make the sentence grammatically correct. after completing the sentence it will show you the next button and from tapping on it, the app will show you the next challenge.