My apologies in advance if this isn't exactly what you're looking for, but http://www.imood.com is a site where you can post how you're feeling at a given time. You can also chat in the forums. I've not been there in a good while due to a lot going on here, but the site is free to use and very accessible on the Mac with both VoiceOver and Chromevox. Not sure if they have an app, but perhaps you could look through the forums.
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iMood
My apologies in advance if this isn't exactly what you're looking for, but http://www.imood.com is a site where you can post how you're feeling at a given time. You can also chat in the forums. I've not been there in a good while due to a lot going on here, but the site is free to use and very accessible on the Mac with both VoiceOver and Chromevox. Not sure if they have an app, but perhaps you could look through the forums.
No
She's looking for something similar to a mood ring, but instead, its aapp. An amp that tracks how you feel or what mood you're in.