App Scope
Research proven iOS apps before you build the next one
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App Scope - Research proven iOS apps before you build the next one

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550+ iOS apps, manually researched over years, Sensor Tower estimates, revenue evidence, and build/maintenance complexity for each. Compare Peak Observed Revenue against Downloads at Peak Revenue to spot strong monetization, not just big install numbers. Not AI-generated ideas, not a guarantee, not a complete App Store map. Just years of research, so you spend less time guessing and more time building the right thing.

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Hey everyone, Robby here, maker of App Scope, collecting iOS app downloads and revenue data since 2022.

I've spent the last several years manually researching individual iOS apps, not for a product, just for myself. Every time I was deciding what to build next, I'd browse the App Store, and then look for the app on Sensor Tower to gather estimates, screenshot the evidence, and log what I found: Revenue, Downloads and Monetization with screenshots for proof. Over time that spreadsheet turned into 550+ researched apps.

I kept using it privately to answer one question before committing to a build: how big is the market, are there any big successful apps in the market, how many competitors, is the market consolidated by 1-2 companies that dominate that market or not? Eventually I figured other indie devs and solo founders were asking the same question and re-doing research I'd already done. So I cleaned up the database and I'm putting it out there.

A few things worth knowing going in:

  • This isn't an AI-generated list of "app ideas." Every entry is manually researched with supporting evidence.

  • It's not a claim that any of these apps will make you money if you build something similar, it's a starting point for research, not a guarantee.

  • It's not a complete map of the App Store. Some niches I checked almost monthly, others more periodically, so coverage reflects what I was personally researching, not everything that exists.

  • "Peak Observed Revenue" means the highest level I personally recorded during my research, not necessarily the app's all-time peak.

There's a free demo of 100 apps, if you want to see the data before deciding whether the full database (550+ apps) is useful to you.

Ask me anything!