GreenRah
The cooler way
Details
- External ID
- 1246156
- Source
- PH
- Company
- —
- Product
- GreenRah
- Website domain
- producthunt.com
- Launched
- Sept. 10, 2026
- Cohort
- —
- Upvotes
- 1
- Upvotes percentile
- 0.30815693820825313
- Tags
- Android, Transportation, Maps, Climate Tech
- Fetched at
- Sept. 12, 2026, 1:01 a.m.
- Updated at
- Sept. 12, 2026, 1:01 a.m.
Description
GreenRah is a heat-smart walking map for hotter cities. Instead of sending you only on the fastest path, it compares sun, shade, weather, slope, and thermal comfort to help you choose a cooler, gentler walk. See shade ahead, compare route comfort, find drinking water and public toilets, and choose accessible paths with easier slopes. Built for commuters, visitors, families, older adults, and anyone who feels city heat first. Starting in EU and GB.
Enrichment
- Theme
- real estate and local intelligence platforms
- Vertical
- —
- Function
- —
- Audience
- —
- AI stance
- —
- Project type
- —
- Normalized one-liner
- —
- Manually corrected
- False
Could you build this?
Partial The routing UI and map display are easy to implement, but calculating dynamic shade, sun angles, urban heat stress, and UTCI requires heavy geospatial modeling and 3D city data processing.
What it would actually take: The backend requires OpenStreetMap pedestrian networks paired with LiDAR or 3D building canopy models (DSM/DTM) to calculate solar cast shadows at any given timestamp. The hard part is computing dynamic edge weights based on thermal comfort metrics (UTCI) and solar azimuth/elevation, then running modified Dijkstra/A* routing algorithms at scale. This demands specialized geospatial analysis and high-performance routing engine knowledge.
Competitors
Other products that read as similar to this one — 25 launches clear the similarity bar, closest 8 shown.
Attention rank: #11 of 26 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 177 days after the earliest competitor.
- Walkable · ph · 2026-06-03 · 165 upvotes · similarity 0.37
- Plan Your Umrah · ph · 2026-09-17 · 1 upvotes · similarity 0.37
- Five Foot Way · ph · 2026-09-26 · 2 upvotes · similarity 0.36
- Sunline Heat Pumps · ph · 2026-09-14 · 1 upvotes · similarity 0.36
- Retroland - Framed Historic Maps · ph · 2026-09-23 · 1 upvotes · similarity 0.35
- Japan Walk Nomad · ph · 2026-09-14 · 1 upvotes · similarity 0.35
- tideglass-cove · github · 2026-09-15 · 14 upvotes · similarity 0.35
- Trail Hilight · ph · 2026-09-24 · 1 upvotes · similarity 0.35
Other launches for this product
- No other launches for this product.