True Strings app for iPhone and iPad

True Strings is a tool for fast and accurate tuning of any string instrument.

How it works
• Select a tuning that corresponds to your string instrument.
• Pluck a string on your instrument.
• Instant feedback tells you if the string is sharp, flat or in tune.
• Adjust the tension of the string on your instrument according to the indicators.
• Repeat this procedure with all the strings of your instrument.

True Strings indicates tones that fall outside the tonal range of your instrument in order to avoid breaking strings while tuning.
True Strings uses a tuning editor with which you can define tunings with any number of strings tuned to any tone within an acceptable range.

Feature highlights
• Range of tone detection A0 - C8
• Very high precision of pitch measurement, about 0.1 cent resolution
• A detected tone is measured in respect to perfect pitch in cents
• Displays detected tone on a string closest to the measured frequency
• 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