3.5% of the initial 17% no?

No. This section of the full report[1] shows it is 3.5% of all subscription apps. See the chart for a clearer visual.

[1] https://www.revenuecat.com/state-of-subscription-apps-2024/#...

But it is subscription apps. If we take all apps?

To an A-student overachiever in the top 5% of their class they must look positively tantalizing. Even assuming half of that 3.5% have insurmountable brand habit or other scale moats not available to you.

Assuming you have many ideas/solutions, how would you choose an under served market category to target?

If there is no low hanging fruit left users must be very happy. Or too set in their ways or addicted. The app stores are not going to advertize their true user content metrics like countries do but rest assured app stores have that data and would move to a much more exploitative mode if they believed no new great apps are to come.

Don’t be, Im guessing it’s those that use RevenueCat which probably means the subset are those with issues in which the standard toolbox is not good enough..

Data is on 29 000 apps that use it. And their second tier is 1700 month one...

So my take is that it is actually very limited set of apps that are in this data.

RC apps are significantly more likely to succeed. The overall “success rate” is (much) lower