AirScore – Daily air-quality emails synthesizing EPA, NOAA, and pollen
Useful passive monitoring, but AirNow and PurpleAir already cover this for free.

Yet another AQI wrapper, but the plain-English email briefs are genuinely useful.
People with asthma, allergies, or health-conscious households
AirNow · IQAir · PurpleAir
Useful passive monitoring, but AirNow and PurpleAir already cover this for free.
The Drying Core™ is a neat, physics-forward idea — it uses vapor pressure deficit, wind desiccation, solar irradiance and dew-point prediction to produce a single drying score and actionable windows. I like the fabric-specific timing, on-device processing and low-latency rain alerts/widgets; the missing piece is hard validation data and regional coverage limits (WeatherKit dependence), which will determine if this is indispensable or just clever.
Useful normalization layer, but openAQ and openair already cover most use cases.
DIY daily briefing agent, but competes with countless newsletter + LLM wrappers.
Solves the agent email gap with a simple API, competing directly with Resend and SendGrid.
Zero third-party email service, fuzzy variable mapping, preview-before-send, but Zapier+SendGrid solves this.