Thanks for all the ideas. Just stumbled on GoldenCheetah, which might be useful for analysis/visualization if I decide to keep the Garmin devices and grab the activity files by USB.
this post was submitted on 12 Apr 2026
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Privacy
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You might be interested in GadgetBridge.
This! If you have good hardware that works, it's good to keep it if possible.
My smartwatch/activity tracker is indeed a Garmin Instinct 2s with Gadgetbridge. It really does most of what the proprietary app does, and gives you near absolute control over your data.
I haven't looked at this is some time but now it supports my watch. This is awesome!
They still sell plain dumb bike computers. Look at Cateye brand.
Still have a few Cateyes laying around. Good stuff.
I've been using a combination of Opentracks for GPS/map and gadgetbridge+PAIesque with an amazfit neo and Decathlon HRM band for metrics and analysis for about a week now, and it's honestly just inferior in every single way compared to my Coros Pace 2.
So there are solutions, but they all kind of suck a little and you have to be willing to accept that.
This is definitely a "choose any x-1 of x" type of problem.
I use FitoTrack for this, another option is Opentracks and as the other person mentioned maybe Gadetbridge, but my Pebble only does step counting so not useful in my case.
CoMaps can export a GPS Exchange Format (GPX) route. See https://wiki.openstreetmap.org/wiki/GPX and that can be used to get most of the data your need. I imagine you could write a spreadsheet or online to do your visualization. I also bet others already did it.
I've done something like that for hikes to plot the path in 3D for WebXR.
As others points out GadgetBridge if you want additional data, typically biosensors for heart rate monitoring, is great to see which hardware is supported.
Sigma is a german Brand, they make modern cycling computers and you don’t need an account to use these devices as far as I know.
Very interesting. They say:
All your activity data is stored exclusively within the SIGMA RIDE app and remains private. You can decide for yourself whether you want to upload it to the SIGMA Cloud. You can save it there permanently so that you can access it if you lose your smartphone, for example.
I wonder if the data could be moved to a laptop/desktop without using Sigma cloud, or if there's a proprietary lock-in to their phone app.
You can use a USB Connection to your computer to access the files on the Sigma without using the Sigma App. The files are stored as .fit files.
I have tested this with the Rox 11.1 Evo. I can’t verify this for other Sigma Computers but it’s probably the same for all of them I guess.
Jepster on Google Play was good but from v8.0 it won't start if, like me, you have Google Play Store disabled. Presumably, they need that for the optional in-app purchases but they never replied to my email so I don't know.
From FLOSS, I am experimenting with FitoTrack which looks promising. Another one is AAT.
Colota is great for general self-tracking.
The V-Meter is all you need
https://www.velominati.com/technology/technology-simplified-the-v-meter/