Psaltikon Tonarion-Isocrater F is a comprehensive tuner and isocrater program developed by Charisis Iliadis for Android devices. This program is specifically designed for chants and students of ecclesiastical music. It has a beautiful environment that respects tradition, and it allows users to detect the tone from the microphone, making it the only tuner/isocrater program that can do so.

One of the main advantages of this program is that it has the entire physical scale from the bottom Di to the Upper Pa, with a very natural transition from one note to the other. It also allows users to select the smoothness in the transition between the notes and change the voice volume and pitch in real-time. Additionally, the program has the ability to edit the tonality of each music note separately and detect the tonality from the microphone. Users can also balance low and high frequencies using the equalizer. Another great feature of the program is that it can display music PDF files and use the isocrater at the same time. Overall, Psaltikon Tonarion-Isocrater F is an easy-to-use program that offers a range of features that are useful for ecclesiastical music students and chants.