Making a living from apps?

Does anyone do this or is it just a casual thing?

I learned vb6 years ago and find this very similar. I am wondering if I could actually set myself as an app developer. How much would you charge per app etc?

I do this as a full time job and the B4X tools are excellent for the purpose.

In terms of charging. I base my fees on a daily rate. I break the app down into features / screens / API calls / items etc, size each one individually and then tot it all up. I have a multipler, < 2, if the client want both iOS and Android.

I usually quote fixed price, but Time & Materials is also possible, depending on the client.

Bear in mind for most apps you will need to develop a back end server for data storage. So you need a knowledge of database development, PHP or some other server based language.

Don't forget the submission also. I get my client now to register their own developer accounts which they give me access to.

Good luck.

Andrew (Digitwell) said:

PHP or some other server based language.

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B4J is an excellent choice for such tasks.

Erel said:

B4J is an excellent choice for such tasks.

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I generally create my apis with php, is there any method I can use to create api responses as json for example other than using websockets ? I want my backend to be accessible with siple web browsers for example to provide json response.

tufanv said:

I generally create my apis with php, is there any method I can use to create api responses as json for example other than using websockets ? I want my backend to be accessible with siple web browsers for example to provide json response.

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Sorry @tufanv , I will have to give the usual:

Please start a new thread for this question

tufanv said:

I generally create my apis with php, is there any method I can use to create api responses as json for example other than using websockets ? I want my backend to be accessible with siple web browsers for example to provide json response.

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I used to do the same... but now I make them with Laravel...

tufanv said:

is there any method I can use to create api responses as json for example other than using websockets ?

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Yes, of course. jServer supports both WebSockets and regular http requests.

Erel said:

Yes, of course. jServer supports both WebSockets and regular http requests.

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Any estimation of how many concurrent connections will it be able to handle ? It will take data from mysql server and give json response on port 80 to customers. I have around 4000 concurrent connections on peaktime. Or let me ask this, is there any calculation like ram for each user is this or cpu use is this etc.. ?

You should start a new thread in B4J questions forum (the performance of jServer / jetty is excellent).