A thread from a couple of weeks ago reminded me of the James Taylor sweetened tuning for acoustic quitar, see video below. He recommends to tune the strings slightly flat in varying degrees by defined amounts of cents. I have a tuning app ("Waves") on my telephone which indicates frequencies. I made the calculation of the frequencies of the Taylor tuning and experimented with it on my acoustic guitars with really satisfying results. However, tuning to a frequency sheet is not really practical in daily routine. I would need a clip on tuner indicating the deviation from equal temperament in cents, like the one James Taylor uses himself. Even better would be a tuner with programmable "sweetened" tunings. The "Petterson Strobo Clip HD" appears to be a nice device (more info here) which provides sweetened tunings, but the James Taylor one is not part of them. Can anybody confirm that it is possible to program and store personal sweetened tunings, as this review suggests? I am less bothered about the absence of a cent indication as I can make the conversion from frequency to cents myself. Are there other tuners which are capable of storing personal sweetened tunings and indicate cents?