Nicheloom

Market intelligence for builders — see what's gaining traction before it's crowded.

Offline-first UK train planner

Details

External ID
47500549
Source
HN
Company
—
Product
Offline-first UK train planner
Website domain
railraptor.com
Launched
March 24, 2026
Cohort
—
Upvotes
6
Upvotes percentile
0.2853628536285363
Tags
—
Fetched at
Sept. 7, 2026, 9:26 p.m.
Updated at
Sept. 7, 2026, 9:26 p.m.

Description

Hey HN! I'd like to share my personal experiment with a different way of finding train journeys across the UK.When I book flights, I use sites like Kiwi and Skyscanner for flexible searches - multiple airports, custom connections, creative routes, etc. But rail search feels oddly constrained. All the UK train operators offer basically the same experience, and surface the exact same routes. I always suspected there were better or just different options that weren’t being shown. Where is the "Skyscanner for trains"?After digging through the national rail data feeds, I decided to have a go at building my own route planner that runs completely offline in the browser. This gave me the freedom to implement more complex filters, search to/from multiple stations, and do it without a persistent network connection.Now I'm finding routes that aren't offered by the standard train operators, connecting at different stations, and finding it's often easier to travel to different stations (some I'd never heard of) that get me closer and faster to where I actually want to go!It's still a little rough and I'd like to add more features such as fares, VSTP data, and direct-links to book tickets, but wanted to share early and get some initial feedback before investing more time into it. So, thanks in advance - let me know what you think.

Enrichment

Theme
travel planning and itinerary tools
Vertical
Travel & hospitality
Function
Search & retrieval
Audience
B2C
AI stance
Not AI
Project type
Hobby / open-source project
Normalized one-liner
offline train route planner
Manually corrected
False

Could you build this?

Partial Creating a route planner UI is easy, but running multi-criteria journey planning (RAPTOR/CSA) offline on consumer hardware with the entire UK rail network timetable is an algorithmic hurdle.

What it would actually take: The application requires compiling National Rail timetables (Darwin/CIF feeds) into highly compressed binary formats (e.g., SQLite, FlatBuffers, or indexed arrays) packaged for client-side execution via WASM or native local storage. The routing engine must execute Round-Based Public Transit Routing (RAPTOR) or Connection Scan Algorithm (CSA) directly in the browser with minimal memory overhead and instant sub-second response times. Implementing this requires deep algorithmic knowledge of graph/transit search algorithms and binary data compression.

Discussion

2 comments analyzed.

Concerns raised: High cost of international rail data APIs, Complexity of different country data formats

Feature requests: Support more countries, Support all of Europe

Competitors

Other products that read as similar to this one — 120 launches clear the similarity bar, closest 8 shown.

Attention rank: #114 of 121 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).

Launched 111 days after the earliest competitor.

Other launches for this product