One number per interval hides the run. Sextant opens each effort up at the right zoom — a 20-second stride or a 5-minute tempo — and sets it beside every one like it.

You train with structure — intervals, tempo, long runs. Your watch and chest strap capture every second. But when you check the splits, every app hands you the same thing: one number per segment. Average pace. Average heart rate. Average cadence.

The average hides the run.

Sextant opens it back up. Look inside any segment and see how your pace, heart rate, and cadence actually moved across those minutes — not a single figure for a five-minute effort. Then set that segment beside every other time you've run one like it, and watch the trend: is this rep faster than last week's? Are you gaining over the season, or just working harder?

And because your runs are finally structured — every segment, in context, with its sources — the AI you already use can read them and tell you what's going on, instead of reading the averages back to you.

Free: a plain-English read on every run, your last 30 days to look back on, and all-time PRs (we read your whole history — only the last 30 days are shown free). Sextant Pro unlocks your full history, the coach-voice read that remembers what you said, and season-over-season comparisons.

See past the averages.

Built for runners who train by intervals and want to understand them — on the road, the track, or the treadmill.