Pacelab Intervals

Newbuildsoft

About this app

Not another workout app. I know. But after 10 years of functional training, I couldn't find one that fit: flexible enough to mix block types, no hidden subscriptions, no paywalled pro features, no clunky old UI. And every app that added AI wanted me on its own chatbot and its own subscription. I already pay for one. So I built the app that just uses it, and I train with it every week. From an athlete, for athletes.

Pacelab Intervals is the workout timer and builder for people who know how to train and don't want the rest. Build your workout. Run it. Share it. Or let your AI build it for you.

YOUR AI BUILDS IT
Connect ChatGPT or Claude and ask for what you want. "Make me a 20-minute kettlebell EMOM." "Build something based on what I trained this week." The workout lands in your library, saved and ready to run. Your AI can also edit workouts, schedule them, and read your training history, so it programs around what you actually did. Both integrations are free. ChatGPT Plus is not required, and Claude works on any plan.

WORKOUT BUILDER
Create custom workouts with 6 block types: Tabata, AMRAP, EMOM, Circuit, Rounds and Timed. Mix them in a single workout. Progressive reps and time: increase or decrease per round. 100+ exercises or add your own. Set work and rest, configure rounds. Exactly how you program.

TIMER
Voice countdowns, auto-progression between blocks, back/skip navigation, pause and resume. See every block, round and exercise before you begin. No surprises during your workout. Just start and move.

SHARE YOUR WORKOUT
Share a link. Athletes, training partners, or clients import it directly into their app in one tap. Turn a workout into a challenge friends can join.

SCHEDULE & TRACK
Schedule workouts, get reminders, track history and personal records. Streaks, session stats, and health app sync.

BUILT FOR
CrossFitters. HIIT athletes. Personal trainers. Home athletes. Anyone who programs their own training and needs a reliable tool to build and run it.

Free. Minimal. No subscriptions. No account required.
No videos. Just your workout, running.

What’s new

Bug fixes.