Honest calories
The Pandolf load-carriage equation, with body weight, pack weight, speed, grade and terrain. A 35 lb ruck up a gravel hill is not a stroll, and your numbers say so.
Private by design
Loadline
Rucking with honest calories
Your ruck counts what you carry
Calories from the load on your back, not a walking guess. Live tracking from iPhone or Apple Watch, a load gauge on every screen, and Apple Health that sees the weight.
A rucking tracker for iPhone and Apple Watch built around one number: the weight on your back.
- No account required for core use
- On-device privacy
- iPhone
- Health & Fitness
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Production capture pending — Active ruck
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Loadline
Production capture pending — Home
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Production capture pending — History
Product tour
What does Loadline include?
One job per screen. Tap a capability to see it.
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Loadline
Production capture pending — Home
Feature 1
Honest calories
The Pandolf load-carriage equation, with body weight, pack weight, speed, grade and terrain. A 35 lb ruck up a gravel hill is not a stroll, and your numbers say so.
Why Loadline?
Faster to value. Harder to abandon.
Speed to value plus privacy-first defaults—so the first session earns the install.
The load gauge
Your current pack as a share of body weight, always on screen, with the 10 to 20 percent band most people train in marked on the rail.
Presets and gear
Build packs from plates, rucksacks and water; weigh a pack in one tap; pick one and start. Terrain and a distance or time goal sync to the Watch.
Questions
Frequently asked questions
The questions people ask right before they hit Download.
No. Tracking, gear, history and Apple Health work entirely on your iPhone and Apple Watch. Only Crew, the optional social part, needs iCloud.
With the Pandolf load-carriage equation, from your body weight, pack weight, speed, grade and terrain, integrated over the ruck. Apple Watch calorimetry ignores pack weight, so Loadline writes its own energy figure to Apple Health and keeps the raw numbers in the workout's metadata.
Each ruck as a Hiking workout, with Loadline's calorie figure, the distance, the route and your pack weight in the metadata. It reads heart rate during a ruck and, in Import, your existing workouts, only when you allow it.
Loadline is free to download and requires a Loadline Pro subscription to use, sold and billed by Apple. The yearly plan includes a seven-day free introductory trial. Manage or cancel it in iOS Settings under your Apple Account, Subscriptions.
In your own iCloud, through Apple's CloudKit. Loadline has no server and cannot read it. Delete my social data, in Settings, removes your profile, posts, kudos, comments, follows, clubs you founded and messages from iCloud.
No. Loadline contains no advertising, no analytics and no third-party SDKs, and its privacy manifest says so.
Download Loadline on the App Store
Premium iOS craft—privacy-first defaults, conversion-ready product pages, zero template feel.
Coming soon
Loadline is almost ready
Join the list for launch updates and support.
Compatibility
Available on iOS.