DataFast web analytics, joined with your app data
Connect DataFast and WhyItChanged pulls website visitors by referrer and campaign, plus revenue DataFast attributes on the web. DataFast covers your website; WhyItChanged adds the App Store, ads and RevenueCat side, so you see the whole funnel in one place.
What WhyItChanged pulls from DataFast
- Daily visitors by referrer and campaign
- Revenue attributed on the web
Questions it answers
- Which web channels bring paying users across web and app?
- Did a traffic spike turn into downloads?
Access it needs
A df_ website API key (or a dft_ account token with analytics:read). Credentials are encrypted at rest and used read-only. How keys are handled.
Set it up
- In DataFast open your website's settings → API and create a key.
- Paste it into the DataFast connector (and the website ID if you use an account token).

Questions
Is this a replacement for DataFast?
No. Keep using DataFast for your website; WhyItChanged reads it so web and app data sit on one timeline.
Works well with
Google Analytics 4
Add GA4 sessions by source to the same timeline as App Store downloads and ad spend, with Google Ads review bots filtered out.
Stripe
Add Stripe web revenue, net of fees and refunds, on top of App Store and RevenueCat revenue. Read-only restricted key, synced hourly.
App Store Connect
Pull App Store Connect downloads, proceeds and impressions by source into one timeline with your releases, ad spend and RevenueCat revenue.
See why your numbers moved.
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