13.1.13.1.1. One question many of the developers in this book have pondered: do I charge for my upgrade? Do I charge for my app at all?13.1.2. What about ad-supported apps like your free version of Instapaper?13.1.3. Are free upgrades a good idea? Or should you make users pay again? Let's use Exit Strategy NYC, featured in Chapter 6, as an example.13.1.4. Loren Brichter, who developed Tweetie 2 and is featured in Chapter 1, decided not to do a free upgrade. Yet Tweetie 2 still shot to the top of Apple's "top grossing list" when it went on sale. How is Tweetie 2 different from Exit Strategy NYC?13.1.5. What happens when the scope of your app changes with a second version, as with Exit Strategy NYC? Should Jonathan have changed the name and risked losing the benefit of SEO in the App Store, in the hopes of having a name that describes the app better?13.1.6. Does the name of an app need to convey exactly what the app does?13.1.7. Do you think buyers have price "benchmarks" that developers should attend to?13.1.8. So reviews are skewed negatively in the App Store?13.1.9. What is the case to be made for apps over $5.00?13.1.10. You dropped the price of Instapaper Pro. What did you learn from that?13.1.11. Why not go lower?13.1.12. Zach West, who is profiled in this book in Chapter 10, said he deliberately priced Prowl a little on the high end to cut out novice users who would flood him with support requests. Do you always want as many sales as possible if you're doing your own customer service?13.1.13. Like a lot of iPhone apps, Instapaper has a desktop version. Should you build an iPhone companion app as a standalone?13.1.14. Why haven't we seen more apps like Prowl that use push notifications in a useful way?13.1.15. When iPhone first came out, there were a few missing links with MapKit; do you think push will evolve the same way?13.1.16. So you can't assume your users have self-control?13.1.17. Why didn't you make Instapaper for iPhone a mobile web site instead of an app?