A body in motion stays in motion.
A running app built accuracy-first and privacy-first. Everything other apps paywall is free here, forever.
If we build it, you get it.
How much you're carrying this week, and when to put it down.
How fit you're getting and how tired you are, in two lines.
Your fastest 1k, 5k, 10k and half, from every run you've logged.
Hills counted fairly: a 7:10 climb can be a 6:20 effort.
Ask Strava for your archive, upload the ZIP once, and we do the rest.
Ask for your archive. In Strava: Settings → My account → "Download or delete your account". The ZIP lands in your email.
Upload it once. Resumable, so a flaky connection can't kill it. A 2 GB, eight-year archive is done in under 15 minutes.
Everything comes home. Every run, PR, photo and shoe, re-timed by our engine with the differences shown.
FIT, GPX and TCX archives from watches and other apps work the same way. Anything unreadable lands in a "needs attention" list with a reason and a retry.
The feed, the night instrument panel, and a run detail that shows its work.
Negative splits after km 15 — your strongest closing 5 k since March.
Streaks, bests, events and challenges struck as coins, your number engraved on the face.
Challenges are free too. Join with one tap and cheer friends along the way.
A full export of everything you've added is yours from Settings, and every run's raw file downloads from its transparency view. Deleting your account happens in-app, export offered first.
An Apple Watch app is on the way: the night instruments on your wrist, readable mid-stride in the dark. The watch is your remote and heart-rate source; your phone owns the recording.
Raw vs corrected GPS on every run, 200 m around home hidden from every shared map, and a live beacon your family opens from WhatsApp.
Read how we earn your trustFree, forever: training load, fitness & freshness, best efforts, grade-adjusted pace. No ads, no premium tier, no selling your data. Race organizers will pay for registrations; athletes never will. If that ever changes, we'll say so first.
In Strava: Settings → My account → "Download or delete your account", and the ZIP arrives by email. Upload it here once and every run, PR and photo comes home, re-timed by our engine. FIT, GPX and TCX archives from other apps and watches work the same way.
It stays yours. A privacy zone hides the 200 m around home from every shared map, photos lose their location before they leave your phone, and nothing about where you run feeds suggestions.
Both, Android first for polish, with an Apple Watch app on the way. Sign in with Google, Apple or your phone number. No passwords.
Batch by batch, a small club first. Join the waitlist and we'll message you on WhatsApp when your spot opens.
A body in motion stays in motion.
Join the waitlistRunning apps quietly smooth your pace, drop your points and map your front door. Inertial does the opposite, and shows its work.
GPS lies sometimes. When it does, we fix the track and keep the raw trace in grey on every run. Every dropped point carries a reason.
Your home stays off the map. A privacy zone hides the 200 m around it from every shared map — on by default, for everyone who isn't you.
Photos lose their location. Location data is stripped from every photo before it leaves your phone.
Plain-language privacy. Every setting explains itself in one sentence.
You choose who sees each run. 🔒 only you, 👥 followers, or 🌍 everyone — chosen explicitly at sign-up, changeable per run.
Share a beacon before a long run or race. Family opens the link, no account or app, and sees your live dot, pace and distance until you're done. The link is an unlisted random token that expires soon after you finish, and your start point is fuzzed like every shared map.
Inertial is built by Parth Dixit and Aryan Dixit, co-founders. Every promise on this page is signed by two people you can name.
Heavy days press deeper. Rest sits light. And your data stays yours.
Join the waitlistGet the app, then enter that code. Joining shows your name and your total to everyone in the challenge. Your runs stay as private as they already are.
Get the appThe challenge it pointed at has ended, or the code was mistyped. Ask whoever sent it for a fresh one.
Back homeWe're letting runners in batch by batch. Leave your number and we'll message you on WhatsApp when your spot opens.
We'll message on WhatsApp when your spot opens.
A body in motion stays in motion. See you soon.