1
Start where you are
Beginner walk-run blocks, a custom calendar, or a full race build. The software should not make you pretend you are further along than you are.
Endurance Bytes LLC
Endurance training, built for Apple.
We make running more approachable by putting the plan on the iPhone and Apple Watch you already wear, matching finished runs from Apple Health, and keeping that data on your devices and in your own iCloud.
What we do
Approachable on purpose.
A lot of running software assumes you already know the jargon, already have a coach, and already have a perfect calendar. We start from the opposite idea: life gets in the way, and the plan should still make sense.
2
Adapt when life happens
Missed runs, travel, and sick days are normal. Our products are built to help you adjust instead of throwing the whole plan away.
3
Built for Apple
Structured workouts land in the Apple Watch Workout app. Finished runs in Apple Health check off plan days. No extra account, no other-brand watch stack.
First product
RunCoachSync
Our first app. Science-backed training plans that sync to Apple Watch, stay private on your Apple devices, and check whether you are on track for your goal.
Your plan, on your wrist
Generate a plan for a 5K through a marathon, send this week’s workouts to the Apple Watch Workout app, and let Apple Health check days off when you finish. Fitness checkpoints are mid-plan time trials that show whether you are on track for your goal time, then retune upcoming paces from what you actually ran.
What “approachable” means here
A few promises we intend to keep as the catalog grows.
Plain language
If a feature needs a glossary to use, we have more work to do. Training science can stay rigorous without sounding exclusive.
Apple native
iPhone, Apple Watch Workout app, Apple Health, and private iCloud. We build into the stack you already trust instead of asking you to join another one.
Privacy by default
No ads, no analytics SDKs, no login, no profile database of athletes. Health data is read on device so runs can match the plan. We do not write Health samples, and we do not operate a server of your training.
Try the first app before it ships.
RunCoachSync is not on the App Store yet. If you want to evaluate a TestFlight build, tell us a little about your setup and we will send an invite when one is ready.
Request a TestFlight invite