Comparison

Lapster Racing vs Kartz

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Lapster Racing

Features
Read full description

Lapster turns your RaceBox into a complete lap timer and telemetry system. And if you don't own one yet, your iPhone can time your laps too. RACEBOX — ALL THREE MODELS RaceBox Mini S, RaceBox Micro and RaceBox Pro. Connect over Bluetooth or Wi-Fi, pull the sessions stored on the device, and every lap is timed, mapped and saved automatically. NO RACEBOX? USE YOUR PHONE Start a session with your iPhone's GPS and get real lap times on any circuit. Live map, predictive delta, lean angle, and a separate 0-100 acceleration mode with its own personal bests. EVERY LAP, IN DETAIL • Replay any lap on the map at 1x, 3x or 5x • Speed, position and time for every corner • Put your lap next to a friend's and see where the time went • Sector splits, top speed, G-forces and lean angle TRACKS Official circuits with verified records, plus tracks you build yourself — drop the start/finish line and sectors straight onto the map. Every track keeps a leaderboard of the riders on it. TRACK DAYS Find track days, book your spot, and read reviews from riders who were actually there — with their photos and lap times attached. SHARE IT Send a lap or a whole session with a link, post a story, or export a poster for Instagram. Your profile keeps every stat and badge you have earned. MESSAGES Direct and group chats with other riders, including voice messages. ALSO INSIDE • Import your existing rides from the RaceBox app (CSV) • Weather recorded automatically for every session • Your garage: cars and bikes, with photos • Available in 14 languages Free to use. Optional donations if you want to support development. Lapster is not affiliated with RaceBox. RaceBox is a trademark of its respective owner. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Apple Watch: view sessions and lap times, chat with other riders, and record, play and transcribe voice messages. Includes watch face complications and Smart Stack widgets.

About

Kartz

Track your karting lap times, monitor your progress across different tracks, and compare your performance with other amateur drivers in France. Discover nearby circuits and share your racing sessions with the community.

Highlights
  • Record lap times per track
  • Track progress over time
  • Compare with other drivers
  • Discover nearby circuits
  • Share and comment on sessions
  • Unlock performance badges
Features
Read full description

Kartz, c'est l'app de la communauté karting amateur en France. Enregistre chaque session, garde une trace de tes meilleurs temps et suis ta progression circuit par circuit. Fini les chronos gribouillés sur ton téléphone : tout est au même endroit, propre et comparable. CE QUE TU PEUX FAIRE • Enregistrer tes chronos et retrouver ton meilleur temps sur chaque piste • Te comparer aux autres pilotes sur le classement de ton circuit • Suivre ta progression dans le temps • Découvrir les circuits près de chez toi sur la carte • Partager tes sessions dans le fil, liker et commenter celles des autres • Débloquer des badges au fil de tes performances POUR QUI Que tu roules en loisir le week-end ou que tu vises le podium, Kartz te donne les outils pour suivre et améliorer tes temps. Rejoins les pilotes déjà sur Kartz et montre ce que tu as dans le moteur. Conditions d'utilisation (EULA) : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Politique de confidentialité : https://kartz.fr/privacy

Screenshots

Lapster Racing4 screens
Kartz4 screens

Verdict

The call

The clearest difference is in-app purchases: Lapster Racing at none against Kartz's 2. Kartz's advantage is update cadence (every 4 days vs every 3 weeks) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Kartz sells 2 in-app purchases, starting at $3.99 per month. Lapster Racing asks for nothing beyond the download.

UpkeepUpdate frequency

Lapster Racing ships an update every 3 weeks, Kartz every 4 days. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.

Scorecard3 real differences · 5 level
Lapster Racing versus Kartz: the parameters behind the verdict, then further details
ParameterLapster RacingKartz
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 3 weeksEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size51 MB99 MB
Age rating4+12+
DeveloperRoman MilushovTheo manzella

In-app purchases

None

Lapster Racing

No in-app purchases

2 purchases

Kartz

Subscriptions2
  • Kartz Pro3 Days trial$3.991 Month
  • Kartz Pro$34.991 Year

Questions

Is Lapster Racing free?
Lapster Racing is free to download, with no in-app purchases.
Is Kartz free?
Kartz is free to download, with in-app purchases available.
Do Lapster Racing or Kartz have ads?
Neither Lapster Racing nor Kartz shows ads.
Which is updated more often, Lapster Racing or Kartz?
Lapster Racing ships an update every 3 weeks, and Kartz every 4 days. Most recently, Lapster Racing was updated on October 16, 2026 and Kartz on October 10, 2026.

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