The authors (imho valid) argument (paraphrased) is that if you have 1k usd to buy a phone when there are equally functional and more open 100usd phones then you

The authors (imho valid) argument (paraphrased) is that if you have 1k usd to buy a phone when there are equally functional and more open 100usd phones then you can pay $25 for an app. Otherwise buy a $100 android and use the free app. Or use the windows and Linux versions (free too)