Hi! I'm from Slovakia. Last year we launched an agrarian mobile app for local farmers. At first we thought we could do with a minimal budget, but we quickly realized that the simpler it was, the worse it was for the users. In the end, we spent about 18 thousand euros for the full cycle - from design to release. The whole development was for a specific task, without templates. An article about how a
custom agriculture mobile app is created helped me in my time - it explains in detail what the price depends on. It may be useful for you as a reference point.