Comparison

Rally Timer Pro vs Rotax MAX Jetting

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

Head to head
About

Rally Timer Pro

Features
Read full description

Great app to measure time on Race Track or Closed Roads either by Car, Motorcycle or Karting! You just need to enter the Location of the Starting point and the Ending point: - Either by save directly the current location - Either by hand In Race Track mode, the location of only one point is needed. Press on "Start" and "Rally Timer" will do the rest. The Timer will start automatically at the Starting point. In Rally mode, the Timer automatically stops at the End point. In Race Track mode, the Timer will stop and automatically restart every lap. "Rally Timer" can record up to 10 lap. In the 2 modes, the Best Time of each race is recorded. ••• Application Features ••• • Perfect for Race Track and Rally! • Tested and Approved by real pilots! • Easy to use! • Save up to 16 different Tracks! • The nearest track is automatically detected!

About

Rotax MAX Jetting

This app helps users find the ideal carburetor main jet size for Rotax kart engines. It calculates settings based on ambient conditions like temperature, altitude, and air pressure, either automatically via GPS or manually. Supports various Rotax MAX engine types.

Highlights
  • Optimal main jet calculation
  • Supports multiple Rotax MAX engines
  • Automatic GPS weather data
  • Manual ambient parameter entry
  • Celsius/Fahrenheit toggle
  • Meters/Feet toggle
Features
Read full description

The Rotax MAX Jetting App enables the user to calculate the optimal carburetor main jet size for Rotax kart engines of the MAX series: - 125 Micro MAX evo - 125 Mini MAX evo - 125 Junior MAX evo - 125 Senior MAX evo - 125 MAX DD2 based on the current ambient conditions - Temperature - Altitude - Air pressure  - Humidity This can be done either automatically using GPS and a functioning internet connection or manually by entering the ambient parameters. *Automatically* Click on Use GPS position for weather data, select the desired engine type from the scroll menu and start the calculation tabbing the Calculate button. *Manually* Enter all ambient parameters, select the desired engine type from the scroll menu and start the calculation tabbing the Calculate button. Important: Since the calculation is based on the "relative air pressure" (air pressure at 0m above sea level), your own barometer must be calibrated to the current altitude before you can actually use the value. Online weather services provide this value by default. To toggle between Celsius and Fahrenheit, press °C/°F and to choose between meters and feet press m/ft next to the entry of the value. To start a new calculation, click Reset.

Screenshots

Rally Timer Pro4 screens
Rotax MAX Jetting4 screens

Verdict

The call

The clearest difference is price: Rotax MAX Jetting at Free against Rally Timer Pro's $9.99. Rotax MAX Jetting also leads on update cadence (every 3 months vs every 14 months). Rally Timer Pro's advantage is iOS requirement (12.0 vs 17.0). On ads, in-app purchases 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

Rotax MAX Jetting is free to download; Rally Timer Pro costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Rally Timer Pro ships an update every 14 months, Rotax MAX Jetting every 3 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Rally Timer Pro versus Rotax MAX Jetting: the parameters behind the verdict, then further details
ParameterRally Timer ProRotax MAX Jetting
Price$9.99Free — better
Rating—1.9 (8 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—8 — better
Update frequencyEvery 14 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size7 MB13 MB
Age rating4+4+
DeveloperDream-UpBRP-Rotax GmbH & Co KG

In-app purchases

None

Rally Timer Pro

No in-app purchases

None

Rotax MAX Jetting

No in-app purchases

Questions

Is Rally Timer Pro free?
Rally Timer Pro costs $9.99, with no in-app purchases.
Is Rotax MAX Jetting free?
Rotax MAX Jetting is free to download, with no in-app purchases.
Do Rally Timer Pro or Rotax MAX Jetting have ads?
Neither Rally Timer Pro nor Rotax MAX Jetting shows ads.
Which is updated more often, Rally Timer Pro or Rotax MAX Jetting?
Rally Timer Pro ships an update every 14 months, and Rotax MAX Jetting every 3 months. Most recently, Rally Timer Pro was updated on October 29, 2026 and Rotax MAX Jetting on October 24, 2026.

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