2-Stroke Lab: Tools & Garage

SimplestSoft

In-app purchases

About this app

2-Stroke Lab is the workshop app for tuners, builders and motorsport enthusiasts working on two-stroke engines — from mopeds and scooters to dirt bikes and custom builds. Calculate, measure, document and share setups: you need nothing else.

Calculators:
• Port timing — with diagram from gauge measurements
• Ignition timing — degrees and millimeters before TDC
• Compression — ratio and combustion chamber volume
• Squish band — squish area and squish ratio
• Mean pressure — torque and specific power
• Counterweight factor — crankshaft counterweighting
• Variator weights — for scooters and mopeds
• Oil/fuel mix — ratio and quantities
• Carb jet — correction for altitude and temperature
• Gearbox — speeds and shift points
• Exhaust pipe — Blair expansion chamber with preview
• Stinger — theoretical tailpipe cross-section
• Flywheel inertia — for dyno rollers and flywheels
• Vehicle dynamics — acceleration and power estimates
• DC wire gauge — for vehicle electrics
• Liquid calculator — electrolyte and cleaning agent concentration

Tools:
• Tachometer — RPM from exhaust sound via microphone, no extra hardware
• Port-timing assistant — guided on-engine measurement with a degree wheel
• Angle meter — 0–360° using the phone’s sensors
• Vibration analysis — measure frame vibration and compare counterweight setups
• Street dyno — estimate power and acceleration from GPS and sensors
• Community setups — share, rate and favorite engine-type setups

Garage:
• Master data, maintenance schedule, fuel log and costs
• Documents, MOT and insurance reminders
• Attach measurements to vehicles
• Cloud sync with your account

Free & Pro:
• Free: Lot of calculators, tools and vehicles, explore the demo vehicle
• Pro: Edit, add, save and compare — one-time purchase via Google Play
• Pro modules (default): vehicles, port timing, wire gauge, liquid calculator, gearbox, tools

More features:
• Calculations processed locally on your device
• German, English, Spanish, Portuguese, Swedish, Danish, Norwegian
• Light and dark theme
• Bottom navigation or side drawer
• Help, FAQ and in-app contact

Note: This app is a technical aid only. Results do not replace professional engine verification. Double-check all measurements before making changes.

Support: [e-mail]

What’s new

- minimal required Androidversion 13
- potential language issues fixed