Technology stack: > Kotlin > Coroutines + Flow > Dagger 2 > MVVM > Room > Retrofit > Jetpack navigation > Composite delegate adapters > Clean architecture > Multimodularity Test video. Improving plans and problems: > Page one: make whole screen as composite adapter(not every recycler view) - so improve performance > Page two: sync photo and gallery recycler views > Add nice night theme > Give authorities of managing navigation bar functions to every fragment(not main activity)