Releasing an iPhone application for a comeback seems to be a growing trend in the K-pop industry, and Rainbow is the newest group to take advantage of the phenomenon.
The application, named RainbowA, features a teaser of their hit song 'A', a MV teaser, the full MV, various photos, and a little info about the app.
Remember to support Rainbow by purchasing their single!
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Thanks to mickki for the tip.
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