It is essential to track user logs correctly to improve and develop your own web/mobile services continuously. For instance, how users flow on your applications to evaluate if they work expectedly or not.

Meanwhile, mobile application trends have been changed quickly such as architectural things or UI related one. Developers continue to add, refactor or rewrite their applications frequently. They also need to release them frequently, 2-week release for instance. Their business also changes quickly. A number of developers working for one application also has been increasing.

As a result, it is quite difficult to catch up with everything. Developers know a part of them. They add, rewrite or refactor codebase they do not know well with exploratory it. Functionalities related to UI are easy to understand. But, it is difficult to uncover what happens in the backend such as what kind of logs the app sends to servers.

In Android case, if one application sends a log to a server on a fragment's onCreate. But the fragment can use in another view. If a developer does not know what the log means, he/she might re-use the fragment in another view if he/she think they can re-use it. It can break activity logs collecting on the server side. How to maintain logs is also an interesting topic though.

In general, we notice the breaking after releasing the app since we can easy to observe the number statistically. But, it means we can not use the data to evaluate our business correctly until we fix it and re-release it.

In this talk, I would like to show an example of how I had been implemented to uncover the above thing following some scenarios based on my experience. It might be an example what we already can automate in the mobile world.

This topic is similar to monitor CPU/Memory/network thing. This story is based on my experience I had been worked for a couple of years.

Through a story of my contribution to OSS projects, especially Appium, you can learn how you can start contributing to OSS world. I would also give some examples to start it.