Hey HN,
My co-founders and I have been building GridTravel, a free iOS app for planning and sharing travel routes with turn-by-turn GPS nav. We just launched yesterday after App Store approval.
We're three 21-year-old cofounders and best friends since middle school. We built GridTravel after years of frustration navigating new cities on every trip we took together.
The idea: most people either search Google for "top 10 places to visit in…" lists or go on social media to get inspiration on where to go. GridTravel is built around user-generated routes — actual paths someone walked, that you can follow, save, download, and discover from other travelers. Users also have the ability to create private routes and collaborate with their friends.
Tech stack: Mapbox (Nav SDK + maps), Supabase (auth, DB, storage), and Swift. Native iOS for now, Android coming soon.
Our two real cost drivers are Mapbox Search (hit when users create routes) and Mapbox Navigation (hit when users use live navigation). Both have free tiers, then scale with MAU. We launched fully free to remove the barrier to entry. Revisiting pricing in Year 2 once nav costs start burning a hole in our pocket.
Current state: we're in the UGC cold-start hole. The app's value scales with route density in a given city, but route density requires users, who require routes. Classic chicken and egg. Our current plan: 1. Manually seed 25–30 routes per city, starting with 5-10 priority cities where we have personal networks rather than spreading ourselves thin. 2. Short-form content as the primary social channel (TikTok, reels, shorts). Doing A/B testing: whether route walkthroughs convert better than informational/skit videos. 3. Partnering with micro-influencers in those cities (5k-50k following) for in-app routes plus cross-posts on their channels
Curious what HN thinks. Especially anyone who's shipped a UGC product. What worked for you on cold start? What do you wish you'd done differently? Happy to answer any questions about the app, costs, etc.
App link: https://apps.apple.com/us/app/gridtravel-local-routes/id6762...
prawn6 hours ago
Some quick feedback - your top two screenshots are absolutely generic: city map, and then featured locations. If you're about the routes, then maybe lead with the other two screenshots and more like those.
I would forget UGC for a long while yet. Just commit to seeding/curating routes yourselves. If you want to involve influencers, generate the routes based on their travel blogs or comments and then link back to them. Saves them doing any work on what will be a wasteland app to start with.
knuaym9op5 hours ago
Those screenshots were on my list to update so thank you for the reminder!
UGC: Our first phase definitely looks closer to what you're describing than the long term goal. We're seeding the major US cities ourselves, then bringing on influencers in those same cities to create routes from their own lifestyle/brand and cross-post on socials — the seeded routes give them a baseline for the format we're going for. UGC from regular users is the longer-term bet, not what we were expecting within our first week of launch.
Your "generate the routes based on their travel blogs, link back" idea is one I hadn't considered, but it's something to think about. Appreciate your input!
momentmaker10 hours ago
Awesome job! Congrats on the launch!
I like the idea of exploring what others had found before. Maybe it doesn't need to be gear towards just travel but also this gives an opportunity for locals to explore places they've never knew before too?
I've also recently launched a walking app - made for myself but thought others would enjoy too. I had added an anonymous collective walk counter which encourages others to keep walking.
BTW, Mapbox does give sponsorships to projects/apps for displaying how their product is being used so once you get to a certain level you could submit a form for it. I know this project was sponsored by them: https://gpx.studio/
Here is my project if you are interested to checking out. Feel free to take any feature you find in there for your app. https://github.com/walktalkmeditate/pilgrim-ios
knuaym9op9 hours ago
Hey man, congrats on the project! And to answer your question, the app is geared towards exploration in your city as well as others. So whether you're planning on going into downtown to explore new places or planning a trip to Tennessee, you're covered both ways! Thanks for the info on the sponsorships, that's my first time hearing about it. The more you know lol.
tf2_pyro8 hours ago
This looks great - I funnily had a very similar idea a while back that I never got the ball on rolling on - so it's great to see you've built this. I unfortunately can't test this right now as I have an Android
Some ideas I had back then on the business side of things - you could explore getting travel influencers on board to market it and create their own custom itenararies. Then you can also connect to booking websites to earn income and give commission shares to route creators.
knuaym9op7 hours ago
We are planning on launching an android version in the near future, just don't have a specific timeline yet. Looking to see how the response is from the iOS users. On the business side: influencer-created itineraries is something we're already leaning into as mentioned above (number 3). As for the other angle for monetization, we've gone back and forth on it. The thing that makes us hesitant is incentive alignment i.e once route creators earn commission on bookings, there's pressure to route people toward bookable places (hotels, paid attractions, restaurants on partner platforms) rather than the local hidden-gem stuff that's the actual value of the app. Not ruling it out—there are versions of it (transparent disclosure, opt-in by creator, separate trips vs routes surface) that might work. Just want to make sure it's done right. Appreciate your input!
alex_c11 hours ago
Wow, this gives me such bittersweet feelings!
This is almost 1:1 with a project we worked on several years ago. Unfortunately it never launched - founder ran out of money. It was one of my favourite projects we’ve done and I genuinely believed in the concept, so I was sad we couldn’t see it come to fruition. But glad someone else is giving it another go!
Without giving away anything confidential, I can say your cold start plan is very similar. Can’t say it’s a good or bad plan because we never saw it executed in practice… but it’s not unreasonable!
I think distribution and stickiness will be a challenge. Even if you get enough content that users will have a great first experience, most people don’t travel that often, so getting them to come back regularly won’t be easy.
Best of luck - would love to see this succeed!
knuaym9op11 hours ago
Alex, appreciate the warmhearted comment. Especially from someone who's been in a similar spot, means a lot. Curious what stuck with you from that project, good or bad, if you're willing to share (contact info in profile if you want to talk privately).
On distribution: agreed. Stickiness is the hard part for sure. Our angle is that the app should also work as a way for users to discover their own city through other people's POVs — not just for travel. We also built in a collaboration feature and private routes, so it doubles as a planning platform whether you're going solo or with a group.
We're hoping the creation side carries the retention we're looking for. Following a route is one side of the coin. Making the route, collaborating with friends, planning places you want to visit over weeks — that's where we're estimating (hoping lol) most of our retention will come from. Can't say for sure yet, not enough data. Thanks again for the comment!
michaefe8 hours ago
Super cool! Unrelated to the idea itself, but it seems like (at least for me) the images on the desktop landing page aren't rendering on either chrome or safari
knuaym9op4 hours ago
Just a FYI, the website is up and running if you still wanted to check it out!
knuaym9op8 hours ago
You're right, just confirmed it on our end. Getting on that now, should be fixed shortly. Appreciate you for taking the time to report it.
binyang_qiu8 hours ago
This idea is super cool! I love traveling and feel that the core of a trip is exploring local/authentic life, so your product perfectly matches my needs! If all people sharing their routes are local and the recommendations are real, not ads, it will be reliable for me to use it to find places. Just one thing, I can't use it in my country:( Hope you can make it globally:)
knuaym9op8 hours ago
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fizza_pizza6 hours ago
This is actually a really fun idea. I’d honestly trust routes made by real people way more than another “top 10 places” blog post.
knuaym9op4 hours ago
Thanks! Yeah that's the idea. Biggest problem we are encountering in the initial stages is just the UGC with users or lack thereof but it hasn't even been 48 hours since launch lol. Seeding major cities at the moment and as the user base grows, the hope is UGC grows as well.
hbarka5 hours ago
Does it allow seeding with prior walks or does it have to be live-collected?
knuaym9op4 hours ago
At the moment, it's manual creation. You build the route by placing waypoints and adding notes, tips, and a cover photo (if you prefer). So you can create the route whenever you'd like. Live recording is something we considered but planned to do later down the line. Hope this answered your question!
sbinnee10 hours ago
I love the idea. Unfortunately, not available in my country. I hope it to be successful and see this app in my country in the future.
knuaym9op10 hours ago
Thanks! Just out of curiosity, what country do you reside in? We're iOS only for now (planning to come to android in the near future) and the App Store availability is set up market-by-market, so it'd be useful for us to know where the demand is.
momentmaker10 hours ago
If you are releasing for every country you might need to do a special form on the App Store for the EU region before they are allowed to distribute your app. I had found this out when I first released mine.
knuaym9op9 hours ago
As of the moment, we are only in the U.S but yes you're right on that.
sbinnee7 hours ago
South Korea
kanglei11306 hours ago
The whole point of container is reproducibility. If my cloud job depends on the exact state of my messy, constantly changing dev environment today, how do I reproduce this exact run six months from now?
hod66549 hours ago
This is for the US only? Geoblocked here :(
knuaym9op8 hours ago
Yes, we are only available in the U.S as of the moment. Planning on expanding into other markets in the future. Stay tuned!
weta3 hours ago
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