iOS and Android mobile app development agency

From a few tens of thousands of euros for a targeted MVP to several hundred thousand euros for a complex B2C app with IT integrations and a dedicated back end. Three main factors determine the cost: the functional scope, the choice between native and hybrid (for the same set of features, native is 1.5 to 2 times more expensive because it involves two code bases), and the complexity of integration with the enterprise system. The initial scoping phase provides precise cost estimates.

Allow 4 to 9 months from scoping to public launch, depending on the complexity. A targeted MVP can be released in 3 months. A full-featured B2C app with onboarding, payment, loyalty, and IT integrations often takes more than 6 months. We prefer incremental approaches with phased launches.

Native (Swift / Kotlin) if performance, access to the phone’s capabilities, and a flawless user experience are critical (high-volume consumer-facing B2C apps, apps that make heavy use of sensors). Hybrid (React Native, Flutter) if you want to optimize TCO and time-to-market while delivering an experience close to native (internal B2B apps, standard B2C apps). PWA if you want to bypass app stores and reach a broad audience via the web. We’ll determine the best approach during the scoping phase.

A PWA (Progressive Web Application) is a web application that installs like a regular app: it has an icon on the home screen, works offline, and sends push notifications (with limited functionality on iOS). It eliminates the need to submit to app stores and download the app. This is useful when your audience has a low app download rate (emerging B2C markets, older audiences, occasional users) or when you want to test a concept quickly.

The submission process involves several steps: creating developer accounts (Apple Developer Program at $99/year, Google Play Console at a one-time fee of $25), complying with editorial guidelines (UX, security, content), conducting compliance tests, submitting the app, and awaiting approval from Apple or Google (which can take anywhere from a few hours to several days). We handle the entire process for our clients.

Three areas: (1) OS updates—Apple and Google release a new version of iOS and Android every year, which must be tested and adapted; (2) functional enhancements based on user feedback and new requirements; (3) continuous monitoring (crashes, performance, conversion). We structure all of this into a mobile maintenance contract tailored to the specific challenges involved.