Why am i not making any money?

I have 5 apps in total and they have been on the play store for about 3 years now and I still havn’t made a single dollar. What do you guys do to make money from your apps? How do you reach users?
Following are the apps i have developed:
https://play.google.com/store/apps/d...a.popter&hl=en
https://play.google.com/store/apps/d...atorFree&hl=en
https://play.google.com/store/apps/d...iny.List&hl=en
https://play.google.com/store/apps/d...loon.Pop&hl=en
https://play.google.com/store/apps/d...d.reader&hl=en

Any help is greatly appreciated.

Hi.
The links are broken, so I couldn’t see the apps.
What do you use: ads, in-app purchases or paid apps?

These links should work:

https://play.google.com/store/apps/details?id=air.fatninja.popter&hl=en
https://play.google.com/store/apps/details?id=air.Tiny.List&hl=en
https://play.google.com/store/apps/details?id=air.TwistCalculatorFree&hl=en
https://play.google.com/store/apps/details?id=air.Balloon.Pop&hl=en
https://play.google.com/store/apps/details?id=air.mind.reader&hl=en

I am using ads, currently using AppLovin, AdBuddiz and Chartboost.

Well, some things:
-interstitials bring more money;
-it’s a good strategy to plane one on user’s exit, when he’s bored with the app;
-ask people to rate your apps, that way the rating will grow and probably improve your apps in the rankings.

Actually most of your apps have quite a high rating… but ask users to rate anyway, more votes are better.

Please provide some stats of the ad network you are using. Not even a single dollar, does this mean no impression or 0 eCPM?

It’s been for three years?
Your apps are simply lost/sink among others apps and could not be found in any keyword.
If no one download your apps, you don’t make money.

My suggestion: create new google dev account, and republish them. Make sure you have certain keyword to target in your description.
Good luck!

I see your oldest app is public on Apr 30, 2014 just 1 year.
If you want to make money try to get many install and then use ads.
The key is active user mean it useful for them or they like it for game

I’m looking to find the best apps that people can sign up with to make money . I know there is what’s poppin and just a couple others but I’m looking for a better list of sure fire easy apps to make extra money with