Launch HN: Indy (YC S21) – A support app designed for ADHD brains

Hi I’m Chris, one of the co-founders of Shimmer, and today we’re launching our new app called Indy ( https://www.shimmer.care/indy ). Indy is an ADHD app for structured planning, reflection, and self-awareness exercises. Here’s a demo: https://www.youtube.com/watch?v=zDSDxyXv6i4 . We started Shimmer in 2022 after my adult ADHD diagnosis, and have shipped several iterations of ADHD support since then (1:1 coaching, web tools, body doubling, and AI-assisted coaching). Across these launches and 80k coaching sessions, we kept running into the same constraint: “knowing what to do” is rarely the problem for people with ADHD. The harder problem is actually doing it consistently over time, especially when attention, motivation, and emotional state fluctuate. That maps to a useful distinction that is explored in the literature (e.g. https://pmc.ncbi.nlm.nih.gov/articles/PMC4589250/ ): “cool” executive function (future-oriented planning, dir