Everything you need to know about GymTime
GymTime tells you exactly when you can workout based on your real calendar.
Not "you should workout at 6am." More like: "You have 42 minutes if you leave in 8 minutes."
It reads your calendar, calculates travel time to your gym, accounts for real-world overhead (changing, packing your bag, checking in), and tells you when you actually have time to work out.
Your calendar shows gaps. GymTime shows opportunities.
You might see "2pm-5pm free" on your calendar. But GymTime knows:
So that "3-hour gap" is actually a realistic 2-hour workout window if you leave by 2:10pm. GymTime does this math for you, in real-time, accounting for schedule changes.
That's exactly what we're testing right now.
The core engine works. Calendar integration works. Live countdown on your lock screen works. The question is: does the "window reveal" moment feel accurate?
When the app tells you "You can workout NOW if you leave in 8 minutes" — is that true? Does it account for your real life? That's what early testers are helping us validate.
Yes. Your calendar data never leaves your device.
Here's how it works:
What we DO store: Your gym preferences, your workout history (when you worked out, not what you did), and your settings. That's it.
Because we can't tell you when you can workout without knowing when you're busy.
Without calendar access, we're just another "workout at 6am every day" app. With it, we can tell you "your 3pm meeting just got canceled — you have time for a 45-minute workout if you leave now."
You control it. You can revoke calendar access anytime in iPhone Settings → Privacy & Security → Calendars.
Technically yes (that's how calendar permissions work), but we only care about when you're busy, not what you're doing.
We read event start times, end times, and locations. We ignore titles, descriptions, and attendees. Your "Therapy appointment" and "Team meeting" look the same to us: blocked time.
You answer a few questions (takes about 2 minutes):
Then you connect your calendar, and the app shows you when you can workout right now.
That's the moment we're testing: does it feel accurate? Would you actually leave?
When you have a workout window, GymTime puts a countdown timer on your lock screen.
You can see exactly how much time you have left without opening the app. It changes color as time runs out (blue → orange → red) and plays an alarm when your window closes.
It's iOS's Live Activity feature (same thing you see for Uber rides or sports scores), but for your workout window.
Yes. Once you know when you can workout, GymTime generates a workout based on:
It's AI-generated (powered by Claude), not a library of pre-made workouts. Every workout is custom to your situation.
Right now, we're in private beta.
Sign up for the waitlist, and we'll invite you in small batches (5-10 people at a time). This lets us respond to feedback personally and fix issues before scaling.
Current wait time: 1-3 weeks depending on when you signed up.
After launch:
Early testers get lifetime free access. If you test the beta and fill out our feedback form, you never pay. Ever.
Two things:
That's it. No ongoing commitment. Just help us understand if this actually solves the problem.
Fair question. Here's the honest answer:
You shouldn't blindly trust any app. Here's what you should know:
Red flag check: If you ever get an email asking for your Apple ID password, it's a scam. Apple and GymTime will never ask for your password.
Check these in order:
If it's been more than 24 hours, email us at [email protected].
This could mean:
If none of these apply, there might be a bug. Email us a screenshot at [email protected].
Perfect. That's why we're in beta.
Email us at [email protected] with:
We respond to every email, usually within a few hours.
Me. Chaz Chamberlain. Solo founder, solo developer.
I built this because I kept skipping the gym not from lack of motivation, but because I genuinely didn't know when I had time. My calendar was a mess of meetings, errands, and last-minute changes.
I wanted an app that would just tell me: "You can go NOW if you leave in 8 minutes." So I built it.
Real company. Reign Zero LLC. Registered business, trademarked name, real monetization plan.
This isn't a nights-and-weekends thing that'll disappear in 6 months. This is what I'm building full-time.
Right now, no. V1 is designed for people who go to a physical gym.
If you work out at home, in a park, or anywhere without a fixed location, the current version won't be useful. The whole engine is built around "travel time to the gym" as part of the calculation.
That said, this is exactly the kind of feedback I want. If enough people ask for home workouts, I'll build it.
Right now, I'm focused on one thing: making sure the window reveal actually works.
If it does, there's a ton we can build on top:
But first things first. Does V1 work? That's what we're testing.
Join the waitlist and get lifetime free access when you test the beta.
Sign Up for Early Access