Proof a niche makes money, before you build
Built on real, regulator-mandated ad transparency data and a multi-million-app catalog — so every niche you chase is already proven to make money.
Working-niche discovery
Stop guessing what to build. Spy surfaces apps that pass every proof of a real, monetizable opportunity at once.
- ✓Apps actively running Google & Meta ads right now
- ✓Monetizing via in-app purchases, not just ad-supported
- ✓Scaling in installs and reviews week over week
- ✓Curated niche starting points: Tools, Productivity, Photo, Video
Live ad-creative intelligence
See the exact ads behind each app, pulled from regulator-mandated transparency centers.
- ✓Google Ads Transparency Center creatives & advertiser pages
- ✓Meta Ad Library creatives, formats, and run dates
- ✓Advertiser variants and creative history
- ✓Direct deep links to each live ad
Whole-catalog search
Query the entire mobile app universe with exact counts and true global ordering.
- ✓~3.4M iOS and Android apps in one columnar data lake
- ✓Sort, filter, and paginate with exact result counts
- ✓Filter by ads-running, IAP, installs, rating, and growth
- ✓Fast facets powered by Athena / Iceberg
Traction & spend signals
Separate apps that are actually scaling from ones that merely exist.
- ✓Growth baselines for installs and rating velocity
- ✓Sustained ad-spend ranking (how long advertisers have run)
- ✓Heating-up niches, week over week
- ✓Zombie hunter: low-rated apps still buying lots of ads
See it on your niche
Browse the full catalog free — no account needed. Go Premium to reveal which apps are running ads right now.