I started app development 6 months ago and had to learn programming from scratch. I generate probably the same salary I'd make in a business/marketing job, except my app income is passive income so I have free time to work on new projects, or use as leisure.
How much is "decent money"? Can a sole developer make enough money to make his hours worthwhile? (I wish... not so sure.)
What money making methods are you open to: a cost for the app itself, a service subscription, in-app purchases, ads (ad networks?), etc.?
On a mobile app by itself, or as part of a bigger brand / platform?
How _niche_? What is your market? How large is your target audience? Does your target audience spend money on apps? How do they spend it? What conversion rate can you expect?
...
I'm not looking for a definitive answer, I'm looking for examples and general input, observations or advice.
I've specified that I'm talking about standalone mobile apps, so I'm not talking about a mobile app that exists in addition to a webapp. I also said that users are only accustomed to paying a one-off payment of a dollar or two to buy the app. Users are not accustomed to in-app subscriptions (for standalone mobile apps).
I'm looking at these apps in the context of a startup, so I guess the minimum amount of money would be a decent annual salary for one or two people, after any expenses.
I'm open to any money making method that users are generally open to, so I think for a standalone mobile app that leaves cost for the app itself and advertising.
As to how niche, I'm asking this question in the general sense, not in relation to a specific example. Any examples from readers would be great.
However, I will say this; from what I've seen, you're more likely to succeed with a mobile-based product aimed at a business niche. Businesses are more willing to pay larger sums (or subscriptions) for solutions, whereas consumers tend to place less overall value on any one app.
The only way to get any definitive answers is to test within the market you're aiming for.
Will every niche make substantial money? Doubtful.