Hi Louis, our company develops mobile apps for iOS and Android for last 4-5 years.
You might find general company work portfolio here and casual games examples here.
Hi there, data shows that over 65% users discover new apps by browsing or searching in the app stores, and most of the just browsing the top 10 apps. Then if I were you, I will boost my app ranking in the app stores to market my app.
To boost ap ranking in the app stores, the first step is choosing keywords. Keywords play a very important role in SEO and so do they in app stores' ranking algorithm too. When you choose keywords, you should take relevance, competition and traffic into consideration. The relevance is the precondition, the trick here is balancing the taffic and competition. You can place the important keywords in app title and descritpition to increase your app ranking with the specific keywords, besides, buy app installs is also a good way to boost app ranking, which can boost app ranking in hours, highly recommend.
Because 95% users will take the app reviews as one of the most important reference factors to judge the app, and most people prefer to download an app which has much more positive reviews, then gather positive reviews is a good way to attract users. You can invite your users, friends and familiers to review your app, besides, you can also buy app reviews from third parties, which are much more convinient.
Hope those methods are useful to u.