How to choose a mobile app development agency in Athens

Choosing a mobile app development agency in Athens usually happens the wrong way round. Three or four studios are asked for a quote, the portfolios are compared, the prices are compared, and the decision is made on the two things that predict least. A portfolio shows what a team could design once. A price shows what it thinks you want to hear. Neither tells you what happens in the second year, which is where most of an app's cost and almost all of its risk actually sit.

A better method is to ask the same handful of questions of everyone, in the first meeting, and listen less to the answer than to how it is given. A team that has shipped and maintained apps answers these quickly, specifically and sometimes uncomfortably. A team that has mostly sold them answers in adjectives.

The first question is whether you need an app at all. Ask it directly, and expect to be challenged on it. If the product is content, a loyalty card or a form people complete twice a year, a fast website or an installable web app does most of the job without two stores to answer to. An agency that has never talked a client out of an app is not advising you; it is quoting you. The good answer sounds like a question back: how often will people open it, and what will it do that the browser cannot?

The second is who builds the back end. Every app talks to an API, and most troubled app projects share one cause: a mobile team consuming an API written for a website, discovering in week three that it returns the wrong shape of data, and negotiating changes with a different team that has other priorities. Ask who writes the API, who hosts it, and whether it will be shared with your website or duplicated beside it. The good answer is one team and one API, with the website and the app as two clients of it.

The third is native or cross-platform, and why. Neither answer is wrong in itself; what is wrong is an answer given before the features are known. A serious mobile app development agency in Athens will ask what the app must do that touches the operating system — sustained background location, Bluetooth, a watch app, heavy graphics, a vendor SDK that exists only as native code — and decide from that list. If the answer arrives in the first five minutes and would have been the same for any brief, it is a habit, not a recommendation.

The fourth is who publishes the app, and under whose name. Ask who prepares the store listings, who answers App Store and Google Play review, and in whose developer account the app will live. The answer that should worry you is the agency's own account with no plan to move it. The app, its listing, its reviews and its users belong in yours, with the agency invited as a team member. Moving an app between accounts later is possible but slow, and it is a conversation nobody wants to have during a dispute.

The fifth is what happens after launch, and it is the one most proposals leave blank. Two operating system releases a year, Google Play's annual target API requirement, Apple's periodic privacy and sign-in rules, dependencies that age out and certificates that expire. Ask how the team monitors crashes, how a version is rolled out to a small share of users first, and how a bug is fixed when the store review is the bottleneck. A good answer names tools and a process: crash reporting per version, staged rollouts, over-the-air fixes for the JavaScript layer of a React Native app. A vague answer means the maintenance will be discovered, and priced, later.

The sixth is what you own when it ends. The code, the design files, the data, the developer accounts and the store listings should be yours in writing, and so should a plain description of how you would leave. Ask for it on paper before the first invoice. An agency confident in its work has no reason to make leaving difficult, and the ones that do usually explain why in the small print rather than in the meeting.

Then a few signals that are worth more than any slide. Ask to install something the team has shipped and still maintains, not a case study video: download it from the App Store or Google Play and use it for ten minutes. Ask who will actually write the code, and meet them. Ask what went wrong on the last project and how it was handled; a team that cannot name anything is either new or not being straight with you. And notice whether the proposal contains a clear written scope and a plan of releases, or only a price and a delivery date.

Location matters less than it used to, and it still matters. An agency in Athens can sit in the same room for the workshops that decide the product, knows that Greek customers expect instalments and an invoice with a VAT number, and works in the same hours as the people who will report the bugs. None of that replaces the six questions above, but for a product that will change every month for years, being able to meet on a Tuesday afternoon is a practical advantage rather than a sentimental one.

For what it is worth, these are the questions we would want to be asked. We build iOS and Android apps in Athens, in React Native and Expo by default and in native code where the product demands it, against the same Node.js and PostgreSQL platform that runs the client's website. The TRVL AIR app, in both stores since September 2026, is built and maintained that way. If the honest answer to the first question is that you do not need an app, we will say so in the first meeting.