Every product line starts before it is a line. At first, it is only an intention, a hypothesis: this can be done well, this can be done with an identity of its own, this can be put into the world. A hypothesis is not a plan. What separates one from the other is the proof. For BLA, the proof was the first published app.
Sudoku BLA was that first app. Not because Sudoku was the most ambitious idea in the queue, but precisely because it was not. It was a scope the right size to test the whole question at once: can BLA take an idea, give it real editorial finish, and carry it all the way to the App Store, approved, working, in the hand of whoever will use it?
The answer was yes. And a yes with concrete proof changes everything. Before it, the app line was conversation. After it, it became a schedule. Sudoku did not answer only that BLA knows how to make Sudoku. It answered that BLA knows how to make and publish a whole app, from start to finish, without outsourcing the hard part.
That is why the expression proof of concept is literal here, not jargon. A concept, that of Brazilian editorial apps, single-purpose, without data extraction, needed a proof. The first app was the proof. It exists, it is published, it is used. From the moment one exists, the others stop being a dream and become a queue.
That is what happened. Notas BLA came next. Lanterna BLA came next. Each one different from the previous one in function, in audience, in form. But all of them could be planned with confidence because the first one had already answered the risk question. Nobody had to ask again whether BLA could do it. The question had an answer.
There is a big difference between a company that says it will make apps and a company that has already made one. The first is presenting intention. The second is showing a result. BLA moved from one to the other on the day the first app was approved and published. Everything that came after rests on that point.
It is also why the first app carries a weight the following ones do not. The following ones improve the line, widen the line, diversify the line. The first one made the line exist. It had to prove not only itself, but the viability of everything that would come behind it.
Today, looking at the queue of apps at BLA, it is easy to see each one as a piece of a set. But the set could only be thought of as a set because one of them was first, was alone, and worked. Proof of concept is not a step you skip. It is the step that authorizes all the others.