IK Multimedia have released a new tuner app for iPhone. There are 582 results for "Tuner" on iTunes in the Music category, including 186 that are Universal, but this is more accurate than all of them... according to IK.
Although this is a standalone app, UltraTuner is also available as an In-App Purchase for AmpliTube.
UltaTuner iTunes Description:
ULTRATUNER™ - THE MOST PRECISE IOS TUNER EVER
UltraTuner features one of the fastest, smoothest and most responsive tuning engines in the tuner app market, and is precise to well below a hundredth of a cent — far beyond human perception of pitch, making it 10 times more accurate than a mechanical strobe tuner (considered the gold standard of tuners). UltraTuner’s accurate pitch detection is achieved through a proprietary dual-analysis processing engine that allows the tuner to get a much more accurate reading of the frequency from the incoming note. The fast response of the tuner makes tuning a mechanical instrument a breeze. UltraTuner’s precision also makes it the perfect app tuner for intonating string instruments like guitar or bass, and by offering note precision down to less than .01 (1/100th) of a cent, making it ideal for calibrating electronic instruments like vintage synths.
- Innovative Engine that allows High Responsiveness and Accuracy
- Dual Mode: Stage and Studio
- Large Tuning indication visible at a distance (stage mode)
- Tuning History to see the tuning variations over time (studio mode)
- Useful not only for tuning, but also for non-chromatic instrument training
- Audiobus and Inter-app audio compatible