TL;DR TestMu wins on price, faster setup, and community support. Use it if you're testing typical apps on phones and web browsers. Pcloudy costs more but tracks 60+ device performance metrics (battery, memory, thermal), supports IoT and smartwatches, is faster to connect, and handles script migration so you don't rewrite tests when switching. Both run parallel tests fine and work with Selenium,
At 3:17 AM on a Tuesday in Q3 2024, our production Kotlin 2.0 microservice fleet hit a 92% memory utilization threshold across 140 nodes, traced to a silent coroutine leak in Ktor 2.2’s request pipeline that had been bleeding 12MB of heap per second for 72 hours. We lost $14k in SLO credits before we found the root cause. A Couple Million Lines of Haskell: Production Engineering at Mercury (78 p