I often use Instagram to create images for my blog posts. You can use Instagram without an iPhone. I did a search for 'Instagram equivalent for android' and found these similar easy-photo-filter type apps:
How do I get instagram on my android phone? You can get Instagram for Android here.
Instagram and filtered images in general are an easy way to make an unprofessional photo look appealing and trendy. This isn't just something for idle teenagers. You can use Instagram to create photos for blog post featured images, the 'About Me' page photo and customer testimonials.