[GEAR] Problem with analogical tuner and G string

I’ve always tuned my guitar with the app Guitartuna, but recently I decided to buy an analogical tuner.

My problem comes whenever I try to tune the G string: when I use the app to tune it as always, my analogical tuner says that the string is not higher enough. I can tune the remainder of the strings with both tuners, but with the G string, this doesn’t happen.

The tuner is a Cherub WST-2058B and I’ve adjusted it to have A = 440hz.