TestFlight vs Expo EAS Ad-Hoc: Two Ways to Test iOS Apps on Real Devices

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React Native developers testing iOS builds on real devices can choose between Apple's TestFlight or Expo's EAS Preview with Ad-Hoc provisioning, each offering a distinct workflow. TestFlight relies on Apple's official infrastructure, where builds are uploaded to App Store Connect, reviewed by Apple, and installed by testers via an invite link — no device UDID collection required. Expo EAS Ad-Hoc provisioning, by contrast, requires developers to register each tester's device UDID in advance, after which a build can be distributed directly via a QR code or install link without needing the App Store. Many development teams use both methods at different stages — Ad-Hoc for rapid feedback during active development and TestFlight for broader beta testing once a build is stable.

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