One of the most crucial aspects of establishing a successful digital footprint in today's tech-driven world is the creation of a compelling mobile application. The journey to app creation often begins with the selection of a mobile app development company. This decision, while seemingly simple, can be fraught with complexities and potential pitfalls that can be easily overlooked by those less experienced in the realm of app development. Looking back, I wish I'd had a better understanding of these complexities to ensure a smoother and more efficient development process.

Firstly, the size of the mobile app development company can significantly influence the development process. While larger, more established companies may have a proven track record, they may not have the flexibility or personalized touch that a smaller firm may provide. On the other hand, smaller companies may lack the resources necessary to execute larger projects. Thus, it is essential to balance these factors when choosing a development company.

Secondly, understanding the different development methodologies is key. The waterfall model, characterized by a linear sequence of stages, can provide a robust structure but lacks flexibility. In contrast, the agile methodology promotes iterative development, allowing for changes and adaptations during the process. The choice between these methodologies can have significant implications for both the development timeline and the final product.

Thirdly, the choice of app development platform – iOS, Android, or cross-platform – can have profound implications on the app's reach, functionality, and cost. While iOS apps are typically more profitable, Android apps have a broader user base. Cross-platform development, using tools like React Native or Flutter, offers a middle ground, although it may require compromises in terms of performance and user experience.

Fourthly, the use of native or hybrid app development technologies can significantly affect the development timeline, cost, and app performance. Native apps, developed specifically for either iOS or Android, typically offer superior performance and a better user experience but at a higher development cost. Hybrid apps, developed using a single codebase for multiple platforms, offer cost and time savings but may compromise on performance and user experience.

Beyond these technical considerations, it is also crucial to understand the company's business model. Some companies may offer a project-based model, providing a fixed cost for the entire project. Others may operate on a time and materials model, where costs are based on the actual time and resources used. Understanding these models can help manage expectations and budget constraints.

Sixthly, the importance of communication cannot be overstated. Regular updates, transparency in processes, and responsiveness to queries are hallmarks of a reliable mobile app development company.

Moreover, the company's expertise in UX/UI design is critical. A user-friendly, intuitive interface is key to app success, and this requires a strong understanding of UX/UI principles.

Another aspect is the post-development support. Once the app is live, it will likely require updates, bug fixes, and potentially new features. The chosen company should provide robust post-development support.

Ninthly, it's beneficial to see if the company offers app marketing services. The success of an app is not only dependent on its development but also its marketing.

Furthermore, understanding the company's policy on app ownership is important. Some companies may retain a certain level of ownership over the developed app, which could cause issues down the line.

Finally, it's beneficial to review the company's previous work. This gives an idea of their capabilities, style, and whether they align with your vision.

In retrospect, understanding these elements before embarking on the app development journey could have mitigated potential challenges. However, these insights, learned through experience, will undoubtedly guide future decisions, ensuring a more streamlined and successful app development process.