Some features stick around not because they're flashy, but because they still work.
Intrvl started as a workout timer app. A simple, no-nonsense way to run intervals and keep your training honest. And while Intrvl has evolved into a fully integrated gym rest timer and weightlifting tracker, we've kept one piece of that origin story alive: the legacy interval set timer inside the Sports Timers section.
It's there on purpose.
Why keep a "legacy" interval timer at all?
Because it keeps us honest about what Intrvl is: a tool for timing work, counting sets, and tracking gym progress. Not a platform. Not a social feed. A timer.
The legacy interval set timer is a throwback to where Intrvl began. For anyone who used early versions of our timer app, it'll feel familiar. For new users, it's a clean, focused way to run classic interval sets.
Where we started: The classic gym rest timer
If you've been around from the beginning, this screen will feel like home:
Start, stop, repeat. Set the interval. Count the sets. Stay on top of your rest period management without overthinking it.
The evolution: Rest timing, now integrated in your weightlifting tracker
The biggest change in Intrvl wasn't adding more timer modes. It was removing the need to choose between timing and tracking.
Most people should be timing their rest. Rest periods aren't an afterthought; they're a training variable. If you're building strength, muscle, or endurance, the difference between 60 seconds and 2 minutes is real.
Rather than making you jump between a standalone timer app and a workout tracker, Intrvl brought them together:
- The gym rest timer now lives within Weightbook, right where you log your sets
- A floating sticky timer keeps timing visible as you move through your weightlifting sessions
- Starting rest is one tap. Log, recover, repeat.
No context switching. No "I'll start the timer in a second" (and then forgetting to track your progress).
The point: Keep the nostalgia, ship the best gym workflow
We keep the legacy interval set timer because it's still a genuinely useful sports timer for focused sets, and because it's where this all started.
But the real story is what came next: a gym rest timer that's part of the act of training. Timing rest and tracking progress isn't two jobs anymore. It's one flow.
If you haven't tried timing your rest consistently, start now. Pick a target rest window, run it for two weeks in our weightlifting tracker, and see how much more repeatable your workouts become.
Rest isn't dead time. It's part of the lift.