Swiftkey, an Android keyboard replacement that many of us have grown to love, has spent the pas week since its official announcement as the No. 1 downloaded paid application in the market. As you can imagine, with all the various paid applications in the market, spending any day at the top is a huge success, let alone seven in a row. Swiftkey is currently on sale in the market for 99 cents, but the sale ends tonight. Effective Friday morning, the price will jump up to $3.99.