
Rebuilding an AI-Built App for Production: What It Costs
The prototype is not 80% of the product. Here is what survives the rebuild, what always gets thrown away, and what the cost really tracks.
The Devfinix Blog
No recycled listicles. Every article here comes out of a real project — what we built, what we measured, and what we'd tell a client to do differently.

A site is not a purchase, it is a subscription to its own continued existence. Here is every line that shows up between launch and year three.

Refusing discovery does not save budget. It moves the cost to the phase of the project where changing your mind is most expensive.

A fixed price is not a safer price. It is a price with a risk premium and a change-request tax already inside it. Here is how to pick a model you can live with.

There are only four real options for an ageing system, and the one most teams reach for is the one that goes wrong most. Here are the criteria for each, including doing nothing.

The hourly rate is a price, not a cost. Rework, timezone overlap, seniority mix and management burden decide what you actually pay per shipped feature.

Eight questions that actually separate one agency from another, written by someone who answers them for a living, with the replies that should end a conversation.

Some technical debt is a sound business decision and some is negligence. Here is how to tell which one your team is carrying, and what to ask for so it stops compounding quietly.

Most accounts stop measuring at 'form submitted', so the bidding learns to buy cheap rubbish. Closing the loop to the CRM changes what the algorithm optimises for.

Two agencies price one brief very differently, and it is almost never the rate. It is what each of them put in the quote and what they left out.
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What we learned shipping client work — the fixes that moved numbers and the ones that didn't. No pitches, and we stop the moment you ask.