A day better than yesterday
you keep going when you can see it

Yes. Naajim is a static web page and all analysis code runs inside your browser. Open your dev tools' Network tab while analyzing a file — you won't see a single file upload request.

Full honest disclosure: when you open the app, at most once a day, an anonymous visit-count signal is sent to our server, and pressing a major button sends just that button's name (at most once a day). No cookies, no identifiers, no personal data, no ride data — only flags like "first visit today" — and no third-party analytics like Google Analytics.

And a map has to fetch pictures to draw itself — every map view pulls tiles from CARTO and the map library from unpkg. Those requests tell them which patch of the world is on your screen (the coordinates of a map tile, not your ride file). Tapping the map to draw a course sends the points you tapped to BRouter, and the weather lookup (on by default — you can switch it off in your profile) sends coordinates rounded to about 1 km to open-meteo. None of them ever receive your ride file, your name, or an identifier. Details are in the app under Help → Service Notice.

Yes — the main interface (home, report, library controls) is available in English (beta). If your browser isn't set to Korean it opens in English automatically, and you can switch anytime with the EN / 한국어 button in the header. Deeper content (help articles, quests, region names) is still being translated.

Any device that records standard FIT files — Garmin Edge, Forerunner, Fenix, Wahoo ELEMNT and more. GPX files exported from Strava, Komoot and similar services also work.

Both, yes. Drop a Strava bulk-export zip and your runs and swims come in with it. Runs are read as pace (min/km) with 1 km splits; swims as pace per 100 m, 100 m splits and distance in metres. Distance, PRs and the weekly ranking are counted separately so a run never drags your cycling averages down. The heatmap, streaks, XP and levels don't care which sport it was — a winter of running keeps them alive. Analyses that only mean something on a bike (power, FTP, TSS) are left out, and the report says what was left out and why.

Pool swims have no map — no route is recorded — and the screen says so; open-water swims with coordinates do get one. Sports we don't handle yet (strength, rowing, walking…) are skipped on import, and we tell you how many were skipped and why.

On the activity page, open the ⋯ menu → "Export GPX". If you need the original FIT, choose "Export Original". You can also plug your device into a PC and grab files straight from the GARMIN/Activity folder.

Analysing and saving rides is unlimited — we don't count them. NP/IF/TSS, climb grading, the rider card (abilities and levels), achievements, the heatmap, the virtual cross-country journey, year-in-review cards, exploration and stamp collecting, one item of gear per sport (a bike, a pair of shoes, a swimsuit), one goal, the ride planner (finish likelihood, rest and supplies), your library, the 3D story video, the weekly ranking and share cards — all free, with no time limit.

There used to be an 8-rides-a-month cap. We removed it: analysis runs entirely in your browser so it costs us nothing, and stopping you at ride number nine only meant you left before the things that need history — the heatmap, personal bests, the cross-country journey — had a chance to add up.

Pro unlocks "deeper" — multiple bikes with part replacement alerts and per-bike stats, three goals, growth quests, ride-over-ride comparisons, PDF reports, training load, and cross-device sync.

Throw a .fit file at ChatGPT and it can't read it. Naajim parses the file, computes the metrics and shapes them into the question a coach would actually ask. Copy that prompt into the ChatGPT, Claude or Gemini you already use (free), or add your own API key on Pro for answers inside the app.

Answers don't stop at the diagnosis — each one ends with [Next actions]: what to do on your very next ride, with target numbers ("open at 88W for the first 10 minutes, warm up to 135bpm"). Keep asking follow-ups, and that conversation stays on this device, so next time you pick it up where you left off.

The request goes from your browser straight to the provider you chose and never touches our server — we can't see your key or the answer. Billing is on your own account, and a single ride on a small model typically costs well under a cent. Only numbers are sent: distance, heart rate, power and so on. Never your route or the ride file.

Press Story video on a report: your route draws itself and then stands up in 3D by the elevation you climbed, with heart rate, speed, elevation, power and cadence flowing along the distance. It takes about 18 seconds, and the finished video is reused for both saving and sharing so you never wait twice.

It ends on the day's brag — a new longest ride, your VO2max or FTP estimate, how many km you rode into the wind, the highest point you reached. Up to five lines, and only what actually happened that day.

Send it straight to Instagram, KakaoTalk, LINE or X — on a phone the share sheet does it in one step. There's no limit on how many you make; free videos carry a short opening title and a logo, and Pro shrinks that to a small mark.

Yes. Add it to your home screen (Android and desktop get an install prompt; on iPhone use Safari's Share → Add to Home Screen) and it opens from an icon with no address bar. On desktop the installed app also becomes a file handler — double-click a .fit/.gpx and it opens straight into a report. Installing changes nothing else: your data still lives only on your device.

One tap on "📲 Move to another device" in your library creates a move link — open it on the new device and every ride, level, badge, bike, goal and your Pro license comes across intact. The link works once, within 48 hours, and the server only briefly holds ciphertext locked by a code that never leaves your link. Free for everyone.

There's nothing to wait for — when checkout finishes you're returned to the Naajim app automatically, and Pro turns on instantly with no key entry. Your license key is also shown on screen; jot it down if you plan to use other devices (3 devices total).

Within 14 days of purchase you get a full refund, no questions asked. One email is all it takes.

One click on the management link in your receipt email cancels the subscription. Even after cancelling, the free features and everything in your library — rides, levels, badges — remain untouched, because the data was always on your device to begin with. If subscriptions aren't your thing, pick Lifetime — during the launch it's 50% off: ₩39,900 ₩19,950 (one payment), with code LAUNCH50 applied automatically at checkout (first 100 riders).