The price of a mobile app depends on what it needs to do, not on a fixed rate. A showcase app and a business app connected to your tools involve very different amounts of work.
This is the first price factor. A showcase or catalog app starts around €3,000 excl. VAT. With user accounts, count on roughly €6,000. An e-commerce or marketplace app runs around €12,000. A custom business app, connected to your processes, sits at €18,000 and up.
Publishing on iOS only or Android only costs less than targeting both. Covering iOS and Android in a single app raises the budget by about 50%, because you have to test and publish on two different ecosystems.
Sign-up, login and profile management add development work (around €800 excl. VAT). In-app payment requires a secure integration and thorough testing (around €1,200 excl. VAT).
Push notifications, geolocation and maps, messaging or chat, offline sync: each feature is a module to design and test. Messaging or an offline mode weigh more than a simple notification.
Plugging the app into an existing tool (CRM, ERP, business software, third-party API) adds integration work. The more numerous or specific your systems, the higher this line goes.
If the interface has to be built from scratch, plan for a design line. If you need a dashboard to manage your content, your users or your orders, that's a back office to develop on top of the app itself.
A project to deliver on a tight schedule (under three months for a substantial app) calls on the team more intensively. An urgent deadline adds about 20% to the budget.
