NotifyMe ‑ Product Warnings

Pretty expensive app but it's worth every penny! Support staff Ovidiu is very prompt in replies and proactive in reaching out to help install this app! ((:

Tried it on one collection and hope I can use different product warnings on other collections as well! ((:

Great app especially in comparison to the rest. What makes it stand out the most is the customer support behind it, the continous drive to improve the service to suit the specific needs of every user.
Highly recommended and definitely the most pleasant experience across the platform so far when it comes to dealing with developers.

The support is very responsive and helped us to individualize the app to our needs.

Edit: The developers reached out to let me know that they have added the option to let you select certain variants within a product listing, rather than selecting only full products. I haven't re-downloaded the app to test this, but it seems like a great feature to have added.
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I'm sure this app is great for certain uses, but we were specifically looking for an app that would show a warning popup when certain variants were added to the cart. Unfortunately, you can only set it for full products rather than specific variants. For that reason, I feel like it's a little limited and doesn't meet our needs.

Tested every review app we could (specifically for a Prop 65 warning). This was the most customizable by far. We needed to make one further tweak and customer support replied to us instantly with a fix. Like, within minutes. Amazing app and support!