GM world-changers. Welcome back to yet another edition of the Leaderboard, today we have: a new way to debug at lightspeed, a new trend for AI developers, Amazon's answer to Temu, and of course, the top products of the day. Let's get started.

Oopsie: Debug apps with AI and session replays.

Session replay has long been on the radar for the most popular mobile observability tools like Sentry to make it easier to diagnose user-facing problems. New player on the scene Oopsie (available only on React Native and Flutter at the moment) claims to be the only AI-powered mobile debugging tool focused on that use case, but I'd be interested to learn what Instabug makes of that claim since they've been adding similar enhancements this year. In any case, all efforts to make debugging easier are welcome and apps that haven't already made similar integrations should give Oopsie a look.

Coval: Simulation and evals to ship voice and chat AI agents.

Building voice agents with LLMs once meant battling latency, interruption handling, and endpointing. Now, frameworks like Vapi and Pipecat make it easier to create agents that perform well “most of the time.” These advancements have pushed voice AI ahead of human agents in many customer support settings, while enabling 24/7 phone support, healthcare check-ins, automated freight scheduling, and experimental voice UIs. But “most of the time” isn’t enough. To achieve consistent reliability, tools for real-time observability, testing, and performance metrics are essential. Coval and Canonical AI are leading efforts here, setting the stage for 2025 to be the year of AI evals and metrics.

Amazon Haul: Amazon's answer to Temu

I’ve never shopped on Temu—partly out of trust concerns and partly because I’m wary of supporting a race to the bottom on prices. But seeing Amazon Haul “backed by Amazon’s A-to-Z Guarantee” intrigued me enough to give it a shot. Unfortunately, the experience has been disappointing. The app feels cluttered, I can’t easily search for items, see prices, or even add things to my cart (maybe it’s overloaded with Black Friday traffic?). Compared to Amazon’s usual streamlined interface, this feels chaotic and full of friction. Maybe Gen Z is fine with the busy design, but I just want a quick, seamless shopping experience. For now, I think I’ll stick with the main Amazon platform.