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An effective mobile app testing strategy consists of the following steps: Align Test Objectives. Identify KPIs for testing: Error rate, maximum response time, peak number of requests; average response time. Simulate a Real-life Testing Environment using system emulators to simulate the user experience it will provide to the users in real-time. Start testing from the Oldest version of an old version of the device or move up from the OS to the latest OS. Test on different software & hardware platforms: Native app or cross-platform.