Sous vide wand recommendations

Hey all, It appears I may be in the market for a new sous vide wand as mine is acting wonky, and I wanted some opinions from you on what to purchase next. I see most people use the Anova brand. For those that do - pros and cons? Differences between the styles? I know theres a nano version, is that just as powerful as their regular ones? Also, do you have to absolutely use the app with it, and does it cost to use? (I would like to avoid having to pay beyond the original purchase of the wand)

And for those that dont use Anova, which ones and why? Im in Canada and was gifted my first one just over a year ago, Heritage brand from Canadian Tire. Its been great until last night while doing a 24 hr cook.The top layer of the screen has lifted on one side and somehow condensation has gotten under it, making the buttons touchy and it shut off in the middle of the night last night. Luckily didnt drop too low but restarting it again was hard as the buttons were touchy, and Ill definitely have to keep an eye in it all day now til its finished. Id like to avoid that happening again.

Thanks in advance!