True Tone app for iPhone and iPad

True Tone plays any tone defined by a temperament. True Tone is useful in tuning instruments, or improving intonation of your instrument.

The operation is simple, just swipe your finger to select a tone and press the fork symbol and instantly you will hear a continuous tone sounding.

Feature highlights
• Range of tone approximately A0 - C8
• High accuracy of tone synthesis
• Common waveforms other than sine waves available
• Several display patterns for accidentals
• Transposition possible for instruments with natural key other than C
• Adjustable reference tone A4 in the range 400 - 480 Hz
• Preset temperament collection available