Hi Erney,
As you have probably discovered there are as many methods of tuning as there are players
I use a tuner app on my phone,it's Android but the same apps are available for IPhone. The one I use is PitchLab Pro, there's a free version but the Pro only costs a few dollars and is much better. It caters for custom tunings and temperaments and offers a variety of screens.
https://play.google.com/store/apps/details?id=com.musician.tunerI use a sweetened tuning, in other words some notes are set so many cents flat and others sharp whilst some stay at concert. To do this I set up a custom temperament in PItchLab Pro, defining each note. This works right through tuning the pedals and levers. Different guitars require different settings but here are mine,
C O, C# -15.7, D -7.6, Eb -9.7, E 0, F -27.8, F# 2.5, G -3.4, G# -9.9, A -6.4, Bb 0, B 1.3
All these values are cents.
Works for me