Beta v0.9 · First 100 users get full version free forever

Your workouts, finally portable.

Download any program. Modify it. Share your version.
No lock-in. Your data, forever.

First 100 users get the full app free. Forever.

How it works

From program to workout in seconds

GET A PROGRAM

AI-generated

Describe your goals, equipment, and schedule. Get a fully structured program that imports directly into the app.

ChatGPT, Claude, Gemini — any AI works

Community

Reddit, friends, influencers. Anyone can share their .trn file.

r/fitness, Instagram, Discord

Classic programs

Starting Strength, nSuns, PPL, Arnold Split. All in one format.

Proven, tested, ready to go
TRN App
1 tap import

.trn is an open format — anyone can build on it

TRAIN

Progress
+2.5kg
Last time
80kg × 8
Rest
2:30

MODIFY & SHARE

Tweak it. Make it yours. Send it to friends.

BUILD YOUR LIBRARY

Collect programs. Switch anytime. Keep your history.

Export .trn
Share
Track progress

Stop losing programs to Notes apps

You chat with AI about your goals. Dial in the details. Design the perfect program together. Then what?

Screenshot it? Paste it into Notes? Copy it to an Excel sheet you'll never open again?

Now it exports straight to your training app. One file. Ready to use.

YOU CAN SAY:

“4-day hypertrophy, dumbbells and bench only, Mon/Tue/Thu/Fri”

“Convert this Instagram post to .trn format”

“Make me a PPL based on Starting Strength principles”

YOU GET:
program: Hypertrophy 4-Day
schedule:
  sequence: [upper, lower, upper, lower]
  rhythm: "1-1-0-1-1-0-0"

workouts:
  - id: upper
    exercises:
      - name: Bench Press
        sets: 4
        reps: 8-12

Just add the format spec link to your prompt. Works with ChatGPT, Claude, Gemini, or any AI.

Why TRN?

“What did I lift last time?”

Shows your last performance at this gym. Different gym = different equipment = different numbers. Finally makes sense.

For beginners and nerds

Basic version works out of the box. Want RPE, rest-pause sets, or myo-reps? Turn them on. Don't need them? Ignore.

Your data, your control

Export anytime. Import from anywhere. No vendor lock-in. No “subscribe or lose your history”.

The app

TRN Home Screen — calendar, today card, active program

Home

TRN Program Detail — workout structure, active program

Program

TRN Active Workout — exercise logging with rest timer

Logging

TRN Workout Overview — session progress and exercises

Overview

TRN Statistics — training insights and progress tracking

Stats

TRN Cyber Theme — customizable app themes

Themes

The vision

“We're building the MP3 moment for fitness programs.”

NOWFree app, import/export .trn files
NOWWeb library — classic programs to download
2026Premium insights, AI-powered analysis
2026Cloud sync, cross-device support
12
Beta testers
88
Spots left

Updates

Development log
Jan 30Design

Terminal UI redesign

New calendar components with status stripes

Jan 28Feature

Workout rescheduling

Drag & drop workouts to new dates in calendar

Be one of the first 100

First 100 users get the full app free. Forever.

88 spots left

No spam. Just a single email when the app launches.

“Your workout program shouldn't be trapped in someone else's app. I wanted to share programs, modify them, track progress — without being locked into one platform.

So I built TRN. Open format. Your data.”
— Viktor, building solo from Prague