Your workouts deserve better than a notes app.
Nuklex is the workout tracker built for lifters who care about progress. Log sets in seconds, see what's working, and never guess again.
500+
Beta users
10,000+
Workouts logged
4.9
Avg rating
From gym bag to gains in 3 steps
No complicated setup. No learning curve. Just start tracking.
01
Create your routine
Build your workout plan on web or mobile. Choose exercises, set targets, and organize your splits.
02
Track every set
Open the app, start your workout, and log sets as you go. Timer, rest periods, and notes built in.
03
Watch yourself improve
See your progress with charts, PRs, and volume tracking. Know exactly what’s working.
Everything you need to train smarter
Most trackers give you a blank spreadsheet. Nuklex gives you a system — designed for how lifters actually train.
Build your perfect split
Design routines with drag-and-drop. Organize by muscle group, movement pattern, or training day.
Execute with confidence
Follow your workout step by step. Auto-populated weights from last session, built-in timers, and easy set logging.
Track real progress
Charts, PRs, volume trends, and workout history. See exactly where you’re getting stronger.
Built for the details that matter
The small things add up. Every feature in Nuklex is designed to save you time and keep you focused on your training.
Progressive overload tracking
Automatically see last session’s weights. Know exactly what to beat.
Custom workout templates
Build once, reuse forever. Supersets, drop sets, and circuit support built in.
Rest timers
Configurable rest periods that start automatically. Stay on pace without watching the clock.
Training insights
Weekly volume, muscle group distribution, and trend analysis at a glance.
Privacy first
Your training data stays yours. Encrypted and never sold.
Works everywhere
Plan on web, train on mobile. Everything syncs instantly.
Lifters are switching to Nuklex.
Here's what our beta testers have to say.
Frequently asked questions
If you have anything else you want to ask, reach out to us.
Is Nuklex free?
Yes. The free plan includes unlimited workouts, exercise logging, and workout history. Upgrade to Pro for progress charts, analytics, and unlimited routines.
What platforms does Nuklex support?
Nuklex has a web app for planning workouts and a mobile app for running them in the gym. They sync automatically.
Can I import my workouts from another app?
Not yet, but it's on our roadmap. We're building import support for Strong, Hevy, and CSV files.
Is my data private?
Absolutely. Your workout data is encrypted and we never sell it to third parties. You can export or delete your data at any time.
Do I need an account to use Nuklex?
Yes, a free account is required so your workouts sync across devices. Sign up takes under 30 seconds.
Can I create custom exercises?
Yes, on the Pro and Team plans. Free users get access to our full built-in exercise library.
Does Nuklex work offline?
The mobile app caches your current workout so you can log sets without signal. Everything syncs when you're back online.
How is Nuklex different from Strong or Hevy?
Nuklex combines web-based workout planning with a fast mobile logger. We focus on progressive overload tracking and making your data actually useful.
Can I cancel anytime?
Yes. No contracts, no cancellation fees. Downgrade to free whenever you want and keep your data.
Ready to train smarter?
Join thousands of lifters who are done guessing. Sign up free and start your first workout in under a minute.