Hi guys!
Last thursday I published my new paid app, about physics, math, chemistry, periodic table, some funny pictures about science and did you know facts. It’s on launch discout for 0.99$. Here is it, go check it out if you like it 
https://play.google.com/store/apps/details?id=com.scienceinpocket.bow
I posted about it on reddit, and it was quite a succes. It got 30 downloads a day for 3 days, but next days it got only 5 downloads a day. The app is now on 3. place on top Top selling news in Education. So do you have any ideas how to promote paid app other than post about it on reddit? Free if possible
There are many ways to promote a paid app, the most efficient way is app store optimization, it helps to boost your app ranking, be searched and known by more potential users.A report shows around 70% traffic of an iOS app is from keyword searches. Once your app ranking is improved, you will get much more downloads.
What else can you do for app promotion? Look there:
1. Think about great icon for your app. It take 20 second when user decide whether to install your App or not because of design.
2. Write description poiting out unique features (do not forget about screenshots of app). Put special scripts of keewords in this description.
3. Ask people to try it and write review (also you can use forums for this). Post this social groups
4. You need to drive traffic to be discovered by organic audience.
5. Make Facebook/Twitter/Google+ pages for your app
6. Always update your app (use bad reviews like possible ways to see what has to be improved).