The period of time it takes even the most experienced software programming company to develop software can range from 3 to 9 months on average, depending on many factors the same way as with the cost. The time required for each stage of the software development process varies, although the following steps take the longest:
Gathering requirements takes 2-4 months.
6 to 12 weeks for design
2 to 6 months for development and prototyping
Tests: 3 to 6 weeks
Up to 2 weeks for submission to the App Store or Google Play
A well-designed landing page, for instance, can be created in 1-2 months. However, if we're discussing a whole platform the time frame will be between 6 and 7 months.
It takes 2-3 months to construct a simple mobile app. Complex — 6 to 9 months, or longer.