New app

New app: Cyclotron

Cyclotron launched on 23 Oct 2026: Open-source offline desktop trainer app: workouts, 22 routes, GPX import.

Innovation: an open-source desktop app that plans your training week, with no virtual world or community

Visit github.comReddit launch postAll about Cyclotron

Cyclotron desktop ride screen with a simple 3D road scene, a rider avatar and live power, cadence, heart rate and interval metrics.
wizzlerr on GitHub · github.com
Workout in progress showing live power, target, interval, cadence, heart rate and TSS tiles above the Over-Unders workout profile and a live power and heart rate chart.
Cyclotron · github.com
Routes library with climbs such as Alpe d'Huez, Mont Ventoux and Passo dello Stelvio, each with a gradient-coloured elevation profile and stats.
Cyclotron · github.com
Workout library with FTP tests and structured workouts shown as interval profiles with duration, TSS and intensity factor.
Cyclotron · github.com

4 screenshots. Scroll or swipe sideways.

About Cyclotron

Open-source (AGPL) desktop app with no virtual world or community: recommended and weekly-planned workouts, FTP tests, a workout builder, ZWO import, 22 built-in routes plus GPX import, and fitness/fatigue tracking; optional Garmin integration.

Features

  • ERG mode
  • Workouts
  • Routes
  • Own routes

Sends rides to

  • Strava
  • Garmin Connect
  • intervals.icu
  • Any tracker, by file (FIT, TCX…)

More from Cyclotron

  • Cyclotron 0.6.1

    Changed

    • "Send rides as a Garmin device": the Garmin copy is now saved with every ride as

    _garmin.fit next to the FIT file (no garmin folder), and "Send to Garmin" selects it.

  • Cyclotron 0.6.0

    Changed

    • Ride buttons moved to the side bar: big and always in the same place. Start / Resume are

    green, Skip yellow, End red. Intensity, World and Mute are there too, and they stay while you
    look at another screen mid-ride.

    • Pick what each Zwift controller button does on the Ride screen (Settings → Devices →

    Controllers): start/pause, skip, end (press twice), + / −, ERG, mute, world or nothing.

    • Combined ride tiles: power / target, average power | NP, and one time tile with the interval

    time left (blue), elapsed and total. Your tile choice is moved over automatically.

    • Louder beeps.

    Fixed

    • Zwift Click v2: the − button raised the power instead of lowering it. Controller buttons now

    follow Zwift: the left side is −, the right side +.

    • Controller + / − in a workout now moves the target by exactly 1 W per press (it was 1 %, so

    1 or 2 W depending on rounding).

    Tested on Mac.

  • Cyclotron 0.5.0Workout type picker on the Today card, with any ride length in minutes
  • Cyclotron 0.4.0Structured ERG workouts, a daily recommended workout and a weekly plan

All news

App details

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