This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
Product upvotes vs the next 3
Waiting for data. Loading
Product comments vs the next 3
Waiting for data. Loading
Product upvote speed vs the next 3
Waiting for data. Loading
Product upvotes and comments
Waiting for data. Loading
Product vs the next 3
Loading
Run Log
Your run, explained — in your browser, no account
Most running apps show you totals and leave you to interpret them. Run Log walks through one run and explains what changed, where, and what might account for it — with the confidence of every claim stated. Free, open source, and your file never leaves the browser.
Hey Product Hunt 👋
I kept finishing runs, opening the app, and looking at a slower third mile with no idea whether that was a hill, the heat, or me falling apart. The chart was right there. It just wouldn't say anything.
Run Log is my attempt at the missing half. You drop in a .fit or .gpx file from your watch and it walks through that one run in order, answering five questions:
What happened? — the totals, and what kind of run this was
Where did it happen? — a draggable timeline and a real map, synced to the same cursor
Which metrics changed together? — what moved at the same moment
What might explain it? — every explanation carrying its own confidence
What does that metric mean? — a short teaching note, specific to this run
The one rule I built it around: what your watch measured is kept visibly separate from what was inferred from it, and no inference can be written without stating how sure it is. That isn't a style guide — it's enforced in the type system. An explanation literally cannot compile without a confidence of high, medium or low, which the page renders as Likely explanation, Possible explanation, or Not enough data to be sure.
What it deliberately doesn't do: rank you, score you, or sort your splits fastest-first. A slow split is usually a hill, and a single number would hide exactly the context this thing exists to surface.
On privacy: your file is read in the browser and never uploaded. Exactly three things talk to a server, all listed in Settings, two of them off until you turn them on. The weather lookup rounds your coordinates to ~11km before they leave — and there's a unit test that exists solely to prove a precise position can't reach the URL, because that guarantee would otherwise fail silently.
It's free, MIT-licensed, has no account, and has no plans to become anything else. There's a demo run on the landing page if you want to look before you drop anything in.
I'd love to hear what you'd want explained that it doesn't explain yet. Happy to answer anything about the parsing, the widget architecture, or why I refused to build a leaderboard.
About Run Log on Product Hunt
“Your run, explained — in your browser, no account”
Run Log was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #158 on the daily leaderboard. Most running apps show you totals and leave you to interpret them. Run Log walks through one run and explains what changed, where, and what might account for it — with the confidence of every claim stated. Free, open source, and your file never leaves the browser.
On the analytics side, Run Log competes within Health & Fitness, Health and Running — topics that collectively have 90.5k followers on Product Hunt. The dashboard above tracks how Run Log performed against the three products that launched closest to it on the same day.
Who hunted Run Log?
Run Log was hunted by Walid Hajj. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Run Log including community comment highlights and product details, visit the product overview.
Walid Hajj