I'm always that person with my face against the window wondering "ok but how fast are we actually going right now". Google Maps doesn't really tell you, and the speedometer apps I tried were either full of ads, wanted an account, or died the moment we went through a tunnel. So I built Popmap: open it, allow location, and you get your speed, heading and altitude straight away, on a map, with a vector line showing where you'll be in 5 and 10 minutes at your current speed and heading. What it does: Speed in km/h, mph or knots. Tap the number to switch. The 5/10 minute line, which is weirdly satisfying on a TGV, a ferry or a plane. Works offline. Every map tile you look at stays on your phone, and you can save a whole area before you leave. Handy in flight mode or at sea. Four modes: drive, outdoors, fly, sail. Each one picks the right maps. Fly mode shows real VFR charts, airspace, nearby airfields with their frequencies, and METAR/TAF. Sail mode has sea marks, wind and waves, and an anchor alarm that rings if your boat drifts. No account, free, no ads. Your position stays on your device. 15 languages, including Arabic and Japanese. Tech bits for this sub: the whole app is a single HTML file using Leaflet. It installs as a web app on your phone and on Android there's a ~300 KB APK that wraps it in a WebView. Map data comes from OpenStreetMap, OpenAIP for airspace and OpenSeaMap for the boat stuff. Would love feedback, especially from anyone who tries it on an actual train/boat/plane. What's confusing? What's missing? Next on my list is VFR route planning. 👉 https://popmap.com   submitted by   /u/Any_Card_6689 [link]   [comments]