The cost of creating an Expo mobile app is obviously dependent on its complexity and the type of Expo services you need to make it.
First of all, you save a lot by building one codebase for all devices (desktop, mobile, tablet, etc.), and both iOS and Android OS.
If you search for a fixed price project, it depends on the internal vendors price list, as well as the developer's skills.
We do not recommend using the help of junior developers, as hidden costs can appear higher than just hiring a decent mid-level developer.
If you work with a smaller agency, you may pay around 30$ - 40$ per hour. Just make sure to interview the developer very well, as they may have some flaws in React Native skills.
If you decide to go with an agency like ours, the investment will be around $40 - $60 per hour. This is the price for a mid-senior level developer with more than 5 years of commercial experience in building React Native applications.
Bigger agencies and software houses may bring the price even higher than 100$ per hour of a developer’s work.