A Pew study on cell Internet use in 2013 found that 57% of all Americans go online with a cellphone. Further, 34% of cellphone users mostly use their phones to go online. Bite-sized apps--which provide the news in an easy-to-read, quick-hit format--are one of the latest experiments in news. Here, Fuchs gives some advice to those who are trying to beat the scramble to produce a good news app