SmartChord Tuner is a precise chromatic tuner, which picks up the tones of your instrument by the microphone of your smartphone and then analyses and visualises them in different ways. On the display you can see: the recognized note inclusive her octave, - the frequency of the played note in Hertz, as well as the target frequency of the note.
According to the antivirus report, the app doesn't contain viruses or any kind of malware. S.mart Music Lab is the developer of s.mart Tuner that can be found in the Music & Audio category. Over 50K users downloaded and set up the tool and its latest release was on Aug 14, 2018.