It is based on Google STT api. The app simply takes your audio as input through the mic and then uses google api to convirt it to text in real time. It may be used online or offline based on the language packages you have installed in your phone.
This app can take your voice as input and convirts it into text. After that there are other share options for different social media platforms and messengers. The button for whatsapp and twitter is given on the main body.
This app can be used if you're not free to write texts and want to say something to post or share through different medias.
You can also update status of your WhatsApp using this app!