Here are the direct links to the apps that
Napoleon PhoneApart found for you,
superchaos
Pollen.com's Allergy Alert by SDI
https://itun.es/us/Me08y.i
WebMD Allergy by WebMD
https://itunes.apple.com/us/app/webmd-allergy/id588509171?mt=8
Incidentally, as I was going to secure these links to share them with you, I noticed the the Mac App Store, doesn't have a Share button to share a direct link to an app with a friend (via e-Mail, via iMessage, post to Twitter, etc.) Perhaps it's simply hidden in a conspicuous location and I couldn't find it (Anyone able to find it?)
I had to go get the links on my iPhone, and share them to myself via iMessage and copy and paste those links from Messages.app on OS X to be able to share with you... Unnecessary extra steps! If Apple provided the Share Link To App functionality on the OS X version of the App Store, everyone wins. The end users, and Apple.
iOS has this! Why not give it to OS X as well? It can only make it easier for users to spread links to apps, resulting in greater sales for the App Store.
Hopefully for OS X 10.9....