All you need is your camera!
Just a GoPro Hero 9, 10, 11 or 13, or a DJI with its GPS remote. No special hardware. Nothing on the steering wheel.
View →
17.8°C
Clear sky
This session was a display of raw pace hampered by inconsistent execution. You clocked a best lap of 72.58s on Lap 4, but your consistency range of 0.69s is currently unacceptable for championship-level racing. To compete at the front, you must narrow that gap to ±0.5s. Your peak cornering force of 1.67g proves you are finding the limit of the tires in the mid-corner. However, your maximum braking force of 0.69g is significantly lower than expected, suggesting you are "coasting" into corners or braking too softly over a long distance rather than attacking the brake pedal. Your smoothness score of 0.598 is mediocre; you are likely fighting the steering wheel instead of letting the kart flow. The lap time progression shows a VARIABLE pattern. While your times dropped initially as tires reached temperature, the spike to 73.27s on Lap 5 suggests a driver error rather than a pressure issue. Your current pressures are likely in the correct window for these 17.8°C clear conditions, but you must stabilize your driving before we can fine-tune the PSI further. Your ability to recover after a poor lap is notable. After the mistake on Lap 5, you immediately brought the times back down to 72.61s by Lap 7. This shows mental resilience and an understanding of where the limit is, even if you aren't hitting it every time. Braking Intensity: You are leaving time on the table by not braking hard enough. You need to hit the brakes with more initial force to shorten the braking zone. Compare your entry speed on your best lap at 12.4s to the tentative entry at 12.8s. Mid-Corner Stability: Your yaw rate is 0.00°/s, which often indicates the kart is too "flat." You need to use the brakes to rotate the kart. Notice the lack of rotation between 45.2s and 48.5s. Consistency: The 0.69s variance is primarily coming from missing your turn-in points. Focus on looking further ahead to hit every apex consistently. For your next outing, your primary goal is to bring your consistency within ±0.5s for at least five consecutive laps. Implement the following technical changes: Brake Harder: Increase your initial brake pressure at the end of the fastest straights to reach at least 0.85g. Tire Management: Maintain your current tire pressures as they are performing well in these 17.8°C conditions. Apex Discipline: Ensure you are clipping the curb at the same point every lap, specifically focusing on the section between 22.0s and 25.5s where you tended to drift wide. Target Time: Aim for a consistent 72.60s bracket without the high-72s or 73s outliers.
Works with Hero 9–13 and DJI Action + GPS remote · Which cameras work
Racing Line
Pista South MilanoGPS Lap Timer
400HzSpeed
Performance Trace
Five channels. One upload.
Your action camera is already recording GPS position, accelerometer data, speed, and gyroscope orientation on every lap. Race Ninja reads it directly from the video file and gives you lap times, sector splits, racing lines on satellite imagery, and braking zone markers. Nothing to install, nothing to configure.
Your Perfect Lap
Every driver has sessions where sector 1 was nailed on lap 3, sector 2 peaked on lap 7, and sector 3 came together on lap 5. Your fastest sectors already exist. Just not in the same lap.
Your Perfect Lap stitches those sectors into a single composite video showing you the lap you're already capable of, with a theoretical time built from your real best-of-session data.
Theoretical best from session
See exactly where you gained or lost
Head-to-Head
Compare two laps side by side with synchronised video and racing lines on satellite.
Sector Analysis
Colour-coded sectors, speed zones, and equipment metrics for every lap.
AI Coaching
Session summary with strengths, weaknesses, and specific setup suggestions.
Show the world what you've got
Build videos with telemetry overlays. Download an MP4 ready for Instagram, TikTok, wherever. Share when you want to. Keep private when you don't.
Compare speed, lateral g-force, longitudinal g-force, and performance traces between any two laps.
See exactly where the time goes
Race Ninja breaks every session down sector by sector. See which parts of the track you nail and which ones wobble, where your typical lap leaks time against your best, and how each sector trends as the session goes on. Every chart points you at what to work on next time out.
Fuse your dashboard data
Running an Alfano, AiM, or other kart dashboard? Upload your session file alongside your video and Race Ninja time-syncs them automatically. RPM, EGT, and hardware speed appear on your video overlay, matched lap by lap.
Any track. Any kart. Any car. Anywhere in the world.
Drive somewhere new, upload the footage, and Race Ninja figures out where you were. It detects the circuit, splits your laps, and builds the telemetry. No manual setup.
Works with:
Racing in 42 countries
179 circuits and counting. Race somewhere new and your track gets added from your GPS data. Pick a country to see its circuits.
No track database. No setup.
Other apps make you check a list before you drive. We don't have a list. Upload your footage from any circuit, anywhere, and Race Ninja detects the track, splits your laps and builds the telemetry. Your local kart club, a track day abroad, a circuit that opened last week. It just works.
- Argentina 1
- Australia 5
- Austria 1
- Belgium 2
- Brazil 3
- Bulgaria 2
- Canada 5
- China 3
- Costa Rica 1
- Croatia 1
- Czechia 1
- Denmark 1
- France 14
- Germany 6
- Greece 1
- Guernsey 1
- Hungary 1
- India 4
- Ireland 1
- Israel 1
- Italy 8
- Japan 1
- Latvia 1
- Malaysia 5
- Netherlands 3
- New Zealand 1
- Panama 1
- Peru 1
- Poland 2
- Portugal 2
- Qatar 1
- Russia 2
- South Africa 2
- Spain 4
- Sri Lanka 1
- Sweden 2
- Thailand 2
- Ukraine 2
- United Arab Emirates 3
- United Kingdom 65
- United States 14
- Uzbekistan 1
Simple, honest pricing
Choose what fits how you race. No hidden fees.
Subscribe
Best for regular racers. AI coaching, 1080p video, permanent hosting.
From £9.99/mo
Pay As You Go
No commitment. 1080p video, weather, sector detection. 365-day hosting.
£1.59 per analysis
From the blog
Tips, tutorials & updates
The data always told the story. Now Race Ninja reads it to you
Every chart on the results page now has a plain-language summary. What changed and what to do about it. No spreadsheet required.
3 min read
GoPro Cloud links are importing again, chapters and all
GoPro Cloud share link imports have been broken since early August. They work again from today, and long sessions that split into chapters now come across as one analysis.
2 min read
The engine wasn't giving him the kick
Roman was driving well. The engine wasn't. We borrowed one and broke into the 39s. Engine insights now sit on the same lap as the camera so you can see a drop-off instead of guessing.
2 min read
Your data stays yours
Every lap you upload is private the moment it lands. It isn't shared with a team. It isn't pooled into anyone else's comparison. It isn't shown to another driver. And it never will be unless you say so.
You decide what happens next. Want your coach or your squad to see a session? Share it. Want to keep a scrappy practice day to yourself? Keep it locked. The choice sits with you on every single lap, and you can change your mind whenever you like.
Your driving is your edge. We're not in the business of handing it to the people you line up against. So nothing leaves your garage on its own. Not your telemetry, not your racing line, not your times.
Private by default
No setting to hunt for. You upload, you analyse, and the data is visible to you and nobody else.
Shared only when you choose
One toggle shows a lap to your team or a rival, or puts it on a public leaderboard. Flip it back whenever you want.