BarkSense

The PCB footprint is too large for a comfortable collar. Before the next prototype, let's target a 2-layer board under 18mm and move the haptic motor off-center.现在的 PCB 尺寸放进项圈太大了。下一版原型前，目标做到双层板、18mm 以内，并把震动马达移到偏心位置。

Love the silicone direction. Add a second colorway for cats vs dogs and consider a magnetic clasp — the current buckle reads too "tech", not "pet".硅胶方向很好。建议增加猫 / 狗两种配色，并考虑磁吸式卡扣——现在的卡扣太「科技」，不够「宠物」。

Pricing model looks solid. The subscription-free angle is your strongest story — lead with it on the store shelf card.定价模型没问题。「无需订阅」是你最强的叙事——门店货架卡上要主打这一点。