How do app developer revenues vary by country, or platform? Does the number of platforms make a difference to app revenues? Which models bring in the most revenues? We revisit Andreas Pappas’ November analysis of app monetisation with more insights from our Developer Economics 2013 survey across 3,400+ developers.

Of the tools and services for developers we asked about in our last survey, one category stands out by miles as having the wealthiest developers: voice services. Of course there’s a lot of variety in the voice services sector and the revenue is not at all evenly distributed.

Voice communication is one of the core functionalities of every mobile phone. However, telephony is up for a big shake-up, as Internet telephony companies like Skype and voice application platforms like the ones below are challenging century-old assumptions about how people speak with each other remotely. Voice Application Platforms allow you to make creative solutions that integrate voice communication deeply in your app: as voice messaging, click-to-call, person-to-multiperson, voice search and more. But despite catering to many use cases, their use is relatively low among developers. An opportunity to stick out of the pack?

There are a wide variety of products that can be considered Backend-as-a-Service (BaaS) offerings. At the time of writing we list 43 of them on our sector summary page. We have previously discussed whether or not they’re a good idea and how much development effort you could save by using one. In our most recent survey we asked developers about their use of some of the most popular options. By comparing developers’ use of BaaS with their average revenues and active user bases, we can determine how well these products are working for them.

Building a great app is not enough – to get lots of users, those users have to be aware that you exist. As app stores focus on top apps, which amount to less than 1% of all available apps, discovery has become a major problem for app makers. One solution is to band together in […]

On the surface, advertising seems like a fairly simple and easy to implement business model for an app. Decide on some places to display ads, integrate one or more third party ad services and wait for the money to start rolling in. If you do this without a clear plan for how and why users will interact with ads in your app you’ll probably find the revenue disappointing. Optimise revenue by growing your user base, increasing engagement…

Creating a successful app business takes a lot more than a good idea and the skills to develop an app and upload it to a store. As we’ve discussed before, developers who promote their apps are almost 3 times as likely to break-even as those who don’t. This is the simplest difference with a massive effect on success. It seems obvious…

[Geroge Karavias, co-founder of Anlock, shares his experiences in marketing kids’ educational apps and proposes a survivor kit to keep in mind when navigating the treacherous waters of this category.] You might have started thinking that putting together an educational app may not be such a bad idea, I mean how hard can it be? Of the App Store’s top 200 paid list of iPad educational apps, 70% are kids’ educational apps. Out of these, roughly 80% are by independent developers…

In December Amazon launched a new A/B testing service for Android apps on the Amazon Appstore. Integrating A/B testing, particularly for in-app purchase related events, in the store portal is a welcome addition. Slightly disappointing considering this comes from a store provider is that the A/B testing service does not support testing different copy or icons on the storefront itself, purely in-app A/B tests, for which there are already third-party alternatives.

Last year was quite a bad one for HTML5 in terms of developer mindshare. At the end of 2011, developer sentiment seemed to favour a shift away from native and towards HTML5 for a large range of application categories. As the year went on, there were more horror stories than…