Publishing of other packaged software (excluding computer games)

Yes, this code makes sense when the activity is not simply writing code for a client but consists of publishing and commercially exploiting a software product: licences, subscriptions, downloads, apps, updates, or digital products distributed to multiple users. If instead you work on commission and deliver code to the client, the most natural comparison is usually with 62.10.00 - Attività di programmazione informatica.

It depends on what actually generates the revenue. If the app is the product and advertising is simply how you monetise it, 58.29.00 can remain plausible. If instead the work shifts to selling ad space, running campaigns, affiliate deals, or promotional content, you may also need to consider advertising or influencer-marketing codes. This is one of those cases where it is worth separating the software product, advertising, and content activities.

Only if the product is not properly a game. 58.29.00 covers software publishing in the broad sense (operating systems, business applications, management systems), but for video games there is a dedicated code: 58.21.00 - Edizione di videogiochi, valid for any platform and also covering in-game and in-app purchases made by the publisher. If you publish a game and monetise it, that is the more precise reference.

Usually not. 58.29.00 concerns software published as a product. If what you publish is lists, directories, text collections, or other editorial content — even in digital format — the closest code is 58.19.00 - Altre attività editoriali, esclusa l'edizione di software. The key question is whether you are selling a program or a published piece of content.