Yes, I agree with your idea,
and I have seen a lot app developers wasting their money on app promotion and get nothing return. They took wrong app marketing strategies and keep spending money in wrong places. But at the meantime, I also found a lot of people who have made it in the app world with a little of money on app promotion. After a lot of talks with those “winners”, I have concluded 10 app marketing strategies that have been proven great for developers.
1 Optimize the app title and keywords. When people are looking for apps in app store, they prefer to search some keywords like shooting game, office software and etc. Optimize the title of your app’s title and description is the first thing you should do after you have developed your app.
2 Make an explainer video for your app. Making an explainer video is a very cost and effective app marketing strategy, because it constantly increase the conversion rate of your app. 70% of people prefer to purchase or download app after watched a video, they are also more satisfied than those who didn't. Because a video could give the user an effective preview of the app, to help they understand an app before they actually own it. There are many great app explainer video service providers such as Appgovideo.com, Appegges.com and etc.
3. Start a blog. This is free and quite effective as well. You may announce and update the news of your app, your company and your team in your blog and you will be able to build great publicity for your own organization. The reason is simple, every people love stories.
4. Submit press release. Entrepreneur Neil Patel says: "Press is the best way to kick start your startup, and the best way to get it is to manually reach out to journalists." There are some great free press release services as well, for example, Free-Press-Release.com and PRlog.
5. Limited-period free. If you developed a paid app, set it as free for a period of time will boost downloads of your app. Since there are a tons of apps deliver news of which app become free to users everyday. Those apps will help you gain huge publicity and awareness for your app.