Shameless plug: I did create a very basic web based invite app with the goal of being platform agnostic - I really think having a app like Invites or my https://rsvp.ngo/ fills the need of getting invites out across platforms.
We've been building WeatherWise, an extreme weather tracking app for your browser and iPhone with Android support on the way. You can track severe weather with the real-time, super-resolution weather radar available for the US, South Korea, Canada and Colombia. Our weather alerts, discussions and tropical related datasets are streamed instantly from the NWS into the app.
Thus far we support:
- Real-time high resolution weather radar
- For all available products
- For all available elevations (tilts)
- Playback synced with weather alerts, storm tracks and lightning
- Data inspector showing the underlying value and 'gate altitude'
- Near real-time satellite imagery (GOES-East & West) covering North & South America
- All the outlooks from the Storm Prediction Center (SPC)
- All severe weather alerts
- Warnings
- Statements
- Watches
- Discussions
- Tropical weather updates
- Storms
- Disturbances
Our business model is freemium where we take free datasets and offer them conveniently in our app for free. We have plans for premium features which will add additional value on top.