Adrian Hon is the CEO of Six to Start, makers of the popular Zombies, Run! app for iPhone. They switched to a subscription model last year, and he has some words of advice for developers considering the option today:
So you need to do everything you can to reassure your users that you’re in this for the long haul. That means regular, consistent updates and bug fixes. You don’t need to release a new build every two weeks like Facebook, but you need to demonstrate commitment to _maintaining _a stable and reliable app — one that adopts useful new features (e.g. Healthkit, Apple Watch) in a reasonably timely manner.
This is the opposite of a big bang release once a year, laden with new features and new bugs. Frankly, it’s a much more sustainable, relaxed, and consdered mode of development. It means you can justify the time to achieve 99.9% crash-free sessions, as we’ve done.
With more subscription-based apps, faster review times are a necessity. Users expect continuous improvements to a service they're subscribed to.