An email alert for horse owners/barn managers when the forecast will be colder than a configured threshold temperature. It's saved us a lot of mental energy this winter (having to check not just the forecast but also making sure to check the temp at 3 AM with windchill factored in, etc...). Got zero interest from various equestrian forums. shrug.
I taught myself Spring Boot through so that's a win!
And email doesn't cut it as an alert mechanism. You'd need to support both SMS and have native apps to support iOS/Android notifications.
I wouldn't invest any time in any other alert medium before verifying this. I doubt it brings anything to the value proposition of the product (but I don't know either, so that would need to be verified)
I've zero interest in commercialising it, I'm building it to play with some technologies I want to learn and because it beats anything I've got currently which is mostly just remembering to check the temperature/wind direction for the next day.
Since then I've wished that Google Maps would add a road trip weather option given that it predicts roughly where you'll be and when for possibly the next 10 hours in a drive.
Between that data and open street maps I have most of the raw data I need, the rest is a halfway usable interface, aggregating and interpolating the data and figuring out a nice way to present the results to be easily grokkable.
Are you still pushing it? I don't think you should give up on that as just a magnet idea, at the very least. Maybe try fleshing out an extra feature/service?
Out of curiosity, how are you handling the emails? In house or 3rd party service?
If not, shame