Nothing breaks the atmosphere in a worship service faster than an out-of-tune guitar — and what's frustrating is that most musicians don't realize it's happening until someone else points it out. We've been there. A guitar that was perfectly in tune at soundcheck can drift half a step flat by the second song if the room heats up or the strings haven't been stretched properly.
We keep this tuner open on a phone or tablet during every rehearsal — not just at the start, but between songs. Guitar strings stretch, especially new ones. Humidity in the Philippines affects wood instruments too. Our rule: if you changed strings in the last 48 hours, retune before every single song until they settle. It's worth the 30 seconds.
For chromatic reference, standard guitar tuning is E A D G B E (low to high). If you're leading in a flat key like Bb or Eb, some guitarists prefer to tune down a half step (Eb Ab Db Gb Bb Eb) and use capo for easier shapes — this tuner handles both perfectly.