Furlong
Know when to run, when to rest
Only for iPhone
Free
iPhone
The fastest runner is the one who isn't injured. Furlong reads your runs from Apple Health and tells you each morning: run this, or rest, and why.
Most running apps are built to make you do more. Furlong will tell you to stop.
It reads your running history from Apple Health, models the load you're actually carrying, and each morning tells you one thing: run this, or don't — and exactly why.
WHY ANOTHER RUNNING APP
Because the others are counting. Furlong is deciding.
Tracking apps record what you did. Social apps show you what everyone else did. Neither knows the difference between the week you can absorb and the week that breaks you. Most running injuries don't come from a bad run — they come from a good week, stacked on another good week, at a moment your body hadn't caught up.
That's the gap Furlong sits in. It's the app willing to say: not today.
WHAT IT ACTUALLY DOES
• One recommendation each morning — distance, effort, or rest
• The reason, always. Every suggestion shows the cause behind it
• Sees a hard week coming before you feel it, and eases off first
• Notices when you've reported a niggle, and holds the plan until it settles
• Builds your long run deliberately instead of letting it drift
• Trends that answer "am I actually fitter?" — not vanity charts
• A week's plan you can see ahead, and revise when life moves
NOTHING LEAVES YOUR PHONE
No account. No sign-up. No server. No feed. No ads. No analytics.
Furlong contains no networking code at all — not "we promise not to look", but no mechanism to send anything anywhere. It reads from Apple Health, thinks on your phone, and writes to your phone. Your health data is nobody's business, including ours.
BUILT ON PUBLISHED TRAINING-LOAD RESEARCH
The model uses established sports-science measures of acute and chronic training load, plus the ratio between them, alongside your own history and reported effort. It's population-level evidence applied to one runner — and the app tells you when it's uncertain rather than pretending it isn't.
WHO IT'S FOR
Runners who've been hurt before and would rather not be again. People coming back from a break who don't trust themselves to start slow. Anyone who's followed a generic plan into an injury. Marathon and half-marathon trainers who need the long run to arrive intact.
WHO IT'S NOT FOR
If you want kudos, leaderboards, segments or a feed, this is the wrong app and you'll dislike it. If you want to be told to push harder every day, you'll dislike it more.
IMPORTANT
Furlong offers training guidance, not medical advice. It does not diagnose, treat or prevent injury or any medical condition, and it cannot know what's happening in your body. Pain that persists, worsens, or changes how you move belongs to a doctor or physiotherapist — not to an app. Always seek professional advice before starting or changing an exercise programme.
Ratings & Reviews
The Today screen now tells one consistent story about your week.
• Today, tomorrow, the week strip, the Rhythm screen and the morning notification all come from one plan, so they always agree.
• Doing the run the plan gave you today no longer reshuffles the rest of your week.
• Your week runs Sunday to Saturday, and its runs and distance sit beside the week strip.
The developer, EREZ KIKIN GIL, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- EREZ KIKIN GIL
- Size
- 2.5 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- Copyright
- © Erez Kikin Gil