"Hello! I’m X, a passionate mobile app developer"
Nothing about this sentence sets you apart from anybody else. You have to convey personality, emotion, and uniqueness in your first two lines of your profile. When you submit a proposal, some clients won't view it, but they DO read the first two lines of your profile as it's shown to them in the list of proposals. Work on making this standout, and unique to YOU.
The rest of the text on your profile isn't formatted very nicely, and honestly I couldn't even tell you had "subheadings" in there because of a lack of spacing. Add some breathing room. Make it human, and again, convey personality, emotion, and uniqueness.
Portfolio - I wouldn't hire you without seeing anything here. Make pretty screenshots, make this section FULLY complete. Add projects, they show up in search ( I use them as a marketing strategy ).
At the end of the day your profile has to get your client excited. When clients reach out to me I often get "nice profile" or "impressive profile". Granted, I have a lot more jobs than you but I was once where you were just 10 months ago. No clients, no feedback, but by implementing some simple techniques like a mentioned above will send you in the right direction.
