It’s all very personal which is the best app. Just try some of the bigger ones and decide for yourself. That’s the beauty: it’s up to you!
Discussion
Do different realys have different content?
The content your seeing indeed depends on which relays you are connected to and to which relays other people are connected to.
It can be helpful to include some larger (paid) relays to see less spam and more value.
Whats the recommended relays for beginers