I have had good luck with this model. I have had it for 9 months and have only had a calibration issue once. The issue was my fault I dropped it about 6 months in. After recalibration it has been functioning as intended since.
Water tester is best in my opinion. You know exactly what's going into the soil when you check the water for feeds.
I use the Hanna pH meter. It has been reliable l, easy to calibrate, and not super expensive compared to the other brands people recommend like Apera and Bluelabs. I actually learned about not from one of these forums. Don't waste your money on the $15 pens like I did because it will let you down and you'll end up buying a better one anyway.
New Model Hanna Instruments HI... https://www.amazon.com/dp/B07738Z42M?ref=ppx_pop_mob_ap_share
I use Hanna instruments. Works extremely well. Super easy to calibrate and it's not ridiculously expensive. Recommendation I found on here and I'm really happy with it.
New Model Hanna Instruments HI 98107 pHep pH Tester, W/ +/- 0.1 Accuracy https://www.amazon.com/dp/B07738Z42M/ref=cm_sw_r_awdo_QNT59TJHEN91RRX2FS4P