Only 5% of people who download apps are still active on the app after 30 days, according to AppsFlyer.
The firm has released its latest State of App Engagement report, which studies the retention data of apps from the second half of 2016.
The report found that apps see an average of between 10% and 12% day 7 retention, dropping to between 4% and 5% after 30 days.
Gamers are the least-engaged users, performing only 6 in-app events across 90 days on average. On top of this, only 2% of downloads convert to paid users, with organic users more likely to spend than non-organic users.
It's not all bad news, however. AppsFlyer found that year-on-year retention rates were up, with iOS user retention rates increasing 9% year-on-year in 2016 overall, and 25% for non-organic users.
North America was also found to be the best region to acquire paying users. 2.25% of iOS users converted to paid users, while 1.3% of Android users converted.