Alternatives
Products that do what Red Grid MGRS does
Free app replacing the military's $2,500 DAGR GPS
- 1RG
I go on a lot of backcountry trips where I barely get cell service. If my group splits, nobody knows knows where anyone is until you regroup at camp or at your destination. You can buy Garmin radios or try to set up an ATAK, but ATAK is Android-only and assumes you have a TAK Server running somewhere to make use of all of the functionality. Cool tools themselves, but expensive to set up correctly. I just wanted two iPhones to share their location directly over Bluetooth when cell coverage was lacking. Red Grid Link does that. Start a session, and anyone nearby running the app shows up on…
Mar 2026 · github.com
- 2BA
Hi everyone! Shortly after publishing my iOS 4 jailbreak last October[1], I got to work on my next hobby project: a from-scratch homebrew GPS receiver, which can solve the user’s location solely from billions of radio antenna samples. I took a commodity SDR (alongside the Python standard library and numpy) and built a signal processing pipeline that can detect and track GPS satellites over many minutes, drop and pick up satellites as they come in and out of view, and precisely determine the user’s position and clock inaccuracy. All told, gypsum can go from a cold start to a fix on the user’s…
2024 · axleos.com
- 3IB
Sup HN, So I got tired of bouncing between Flightradar, MarineTraffic, and Twitter every time something kicked off globally, so I wrote a dashboard to aggregate it all locally. It’s called Shadowbroker. I’ll admit I leaned way too hard into the "movie hacker" aesthetic for the UI, but the actual pipeline underneath is real. It pulls commercial/military ADS-B, the AIS WebSocket stream (about 25,000+ ships), N2YO satellite telemetry, and GDELT conflict data into a single MapLibre instance. Getting this to run without melting my browser was the hardest part. I'm running this on a laptop…
Mar 2026 · github.com
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For the uninitiated, a geocoder is maps-tech jargon for a search engine for addresses and points of interest. Geocoders are expensive to run. Like, really expensive. Like, $100+/month per instance expensive unless you go for a budget provider. I've been poking at this problem for about a month now and I think I've come up with something kind of cool. I'm calling it Airmail. Airmail's unique feature is that it can query against a remote index, e.g. on object storage or on a static site somewhere. This, along with low memory requirements mean it's about 10x cheaper to run an Airmail…
2024 · blog.ellenhp.me
- 73T
I'm working on a GPS track visualizer for quite some time. It shines in hilly and mountaineous terrain (where a 3D view makes more sense), but it also offers quite a lot of Strava-like features (statistics etc.). You can upload your GPX and FIT files manually, or sync directly with Garmin, Coros and Polar. See https://cubetrek.com for the live app and check out some examples there. It's free and opens source. Also, anyone who likes to work with 3D visualizations (especially Babylon.js), let me know if you like to help polish this thing further.
2025 · github.com
- 8OS
International Space Station Tracker on an ESP32 CYD (Cheap Yellow Display) costing $20. Live update over Wifi, touchscreen, backlight power management. Cheap and interesting classroom STEM project. Fully open source.
2025 · github.com
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Jan 2026 · github.com
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Hi all, This project release is a long time coming. It was a big uphill battle, and by far my largest endeavor so far. I built it for Sandstorm because I believe in Sandstorm's model, and I wanted to show that there's still life and potential in it. If you're inspired, joining our OpenCollective would be really helpful: https://opencollective.com/sandstormcommunity (keeping in mind that Sandstorm has now moved from its original leadership to a community project https://sandstorm.org/news/2023-11-03-from-io-to-org). You can also join our mailing list or…
2023 · sandstorm.org
- 15FD
MBCompass: A popular modern FOSS Compass and Navigation app without Ads, IAP, or Tracking New Release: MBCompass v1.1.12 This release and upcoming ones follow the feature roadmap proposed in the v2 design proposal. Features: - Shows clear cardinal direction and magnetic north as well as true north. - Displays magnetic strength in µT. - Live GPS location tracking on OpenStreetMap. - Sensor fusion for improved accuracy (accelerometer, magnetometer, gyroscope). - Light and dark theme support is controlled via Settings. - Keeps the screen on during navigation. - Landscape orientation supports -…
Nov 2025 · github.com
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Encrypted Bluetooth team tracking. No servers needed.
Mar 2026 · redgridtactical.github.io
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Built by a firefighter for group safety with zero signal.
Apr 2026 · rankan.app
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Hey HN, I posted Out Plane here last week. Wanted to share an update because I've been shipping a lot. I started this because deploying side projects was killing my motivation. Build something fun over a weekend, then waste two days on Dockerfiles, nginx, and SSL. So I built what I wanted — connect GitHub, push code, get a URL. Done. Since December I've added managed PostgreSQL, managed Redis with RedisInsight built in, Dockerfile auto-detection that pre-fills your config, real-time metrics, and scale to zero — no traffic means no bill. Per-second pricing, not hourly. Same Next.js + Postgres…
Feb 2026 · outplane.com
- 22GP
Out of curiosity, I put together a simple website which tracks the prices for a few variations of A100/H100 GPUs by hour broken out between spot/ondemand, form factor and provider. Specifically I was tailoring the tool towards the smaller, emerging providers like runpod, gpulist.ai, lambda labs etc. Anyone have any ideas to expand/refine it?
2024 · computeindex.michaelgiba.com
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Hey HN, I built Server Compass because I got tired of two extremes: paying $200+/month to Vercel/Railway for a polished deploy experience, or wrestling with self-hosted panels (Coolify, CapRover, Dokploy) that eat up half my VPS resources just to run their dashboard. The core idea: A GUI SSH client that gives you Vercel-like deployment UX on your own VPS. Nothing gets installed on your server except your apps – every command runs over SSH from your desktop. What it does: - 1-click deploys from GitHub repos or 160+ pre-built templates (Postgres, WordPress, Ghost, Supabase, n8n,…
4d ago · servercompass.app
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