I want to know if flowers are just decorations or are actually important. I do know that some flowers can be made into dye(Sky blue flower, etc…).
Is collecting them necessary? Should I collect the seeds and plant them as well?
Terraria – Are flowers important
terraria-mobile
Related Solutions
The game has a total of 21 NPCs that can move into your house. They are:
- The Guide
- The Merchant
- The Nurse
- The Painter
- The Dye Trader
- The Demolitionist
- The Dryad
- The Arms Dealer
- The Party Girl
- The Goblin Tinkerer
- The Witch Doctor
- The Clothier
- The Mechanic
- The Angler
- The Traveling Merchant
Additionally, in hardmode you gain:
- The Pirate
- The Truffle
- The Wizard
- The Steampunker
- The Cyborg
- The Tax Collector
Finally, there is one event NPC that do not live in housing:
- Santa Claus (shows up randomly between Dec 15-31st)
If you look at the wiki you can see a list of all the NPCs in the game. You can tell which NPC is only available in the PC version because these NPCs have a small icon of a computer directly after their description. It looks like this: 
Yes, Skeletron masks are obtainable on mobile. Maybe you just haven't had the best of luck so far, because it should be a 1/7 chance, but eventually you will find a mask that looks like this:
Best Answer
In the desktop game, plants are used for potions. They can be farmed to mass produce potions, or collected on your travels for low effort harvesting. I would highly recommend keeping them, although some you'll find are simply inventory fillers.