GoSmooth helps you become a smoother, safer, and more economical driver — while still having fun. This manual explains step by step how the app works, how your scores are calculated, and how you can improve.
GoSmooth is available in three versions. Some functions are only visible in the higher tiers.
In the manual, features are tagged with Free, Basic and Pro.
GoSmooth analyzes vehicle motion using GPS and the motion sensors built into your iPhone. AI algorithms automatically detect maneuvers and evaluate them based on comfort, safety, and energy usage.
Simply put: The smoother your maneuvers, the higher your score.
GoSmooth calculates several types of scores that together form your Total Score for each trip.
GoSmooth automatically detects different maneuvers and assigns individual scores between 0 and 10. In Basic and Pro, you can receive additional Boost points.
Better drivers drive smoothly: they plan ahead, avoid abrupt maneuvers, keep speed consistent, and use throttle and brake deliberately.
GoSmooth uses g-forces, sensor filtering, and AI models to evaluate your driving behavior. Energy and score calculations are based on behavior, independent of car model.
Important terms such as Maneuver, Sub-maneuver, g-force, Boost, or Consistency are briefly explained here.
Before using GoSmooth, please read the following information carefully:
The use of this app must never distract you while driving. Never operate the app while the vehicle is in motion.
Mount your smartphone in a way that does not obstruct your view, your concentration, or the safe operation of the vehicle in any way.
You are at all times solely responsible for the safe control of your vehicle. GoSmooth is intended only to analyze and support your driving style and does not replace careful, attentive, and lawful driving behavior.
Use of the app is at your own risk. GoSmooth and its developers assume no liability for damages, accidents, or any consequences that may arise directly or indirectly from the use of the app, distraction, or improper usage.
GoSmooth analyzes vehicle motion using GPS and the built-in motion sensors of your iPhone. The app detects maneuvers (Start, Accel, Brake, Stop, Steer) based on measured accelerations and rotations and evaluates them. AI models determine the driving situation and classify each maneuver.
Each maneuver receives a Maneuver Score, and the categories Consistency, Safety, and Eco together form your Total Score for each trip.
Everyone thinks they're a “good” driver ;-) Better drivers are those who drive safely, comfortably, and economically. In short: A better driver drives SMOOTH.
A simple indicator is the head of a passenger: The less it “nods”, the smoother the trip.
Driving should be fun — and feeling acceleration forces is part of that. That’s perfectly fine as long as it fits the situation.
Find a balance between fun and responsible driving. Save dynamic driving for the right places. In everyday situations, smooth driving is safer and more relaxed. GoSmooth helps you become more consistent and aware of your driving style.
GoSmooth is designed for drivers who:
Requirements: an iPhone with current iOS, GPS reception, and the GoSmooth app.
Scoring is mainly based on how smooth your maneuvers are. Smooth means that acceleration forces are as low and consistent as possible. High or abrupt forces are uncomfortable, stressful, and inefficient.
GoSmooth measures accelerations and their changes in all directions. Two key characteristics are derived:
Every acceleration requires energy. Braking mostly destroys energy (in combustion cars as heat; in EVs partially recuperated). GoSmooth currently treats braking as energy loss. A dedicated EV version will follow.
Better drivers aim to:
GoSmooth evaluates not only how strongly you accelerate or brake, but also how consistently you perform maneuvers:
Fewer interruptions and smoother progression = higher score.
Steering is evaluated based on lateral acceleration. Smooth steering means:
Unnecessary corrections increase forces, tire wear, and reduce stability.
The start maneuver describes moving from standstill. Evaluated factors:
Goal: accelerate gently, no jerks, low g-forces.
Evaluated factors include:
Small, gentle maneuvers contribute less to negative scoring.
Tip: accelerate only as much as needed so you don’t have to brake immediately afterward.
Stop maneuvers always end at 0 km/h. Evaluated similar to braking:
Ideal stop: reduce brake pressure at the end to almost eliminate the final jerk.
Steering evaluation includes:
The smoother & longer you hold a constant steering angle, the higher the score.
Consistency evaluates how evenly you maintain speed.
A slight overshoot (about 3 km/h) is tolerated. Longer or stronger exceedance lowers the score.
Speed limit data may not always match reality, so the Safety Score has moderate weight.
Eco evaluates the energy-efficiency of your driving:
GoSmooth uses a standardized physics model (car weight 1,500 kg, 28% engine efficiency, etc.) to allow fair comparisons independent of your car.
Shows your Total Score and detailed trip results. Tapping a trip opens detailed view.
Chronological list of all maneuvers in a trip.
Detailed trip analysis:
Documentation and configuration options (chart windows, display settings, etc.)
The biggest difference between good and better drivers is anticipation. Look far ahead, not only at the car in front. Early recognition allows smooth braking instead of abrupt reactions.
Accelerate only as much as needed — and smoothly.
Initiate braking early. Reduce brake pressure before stopping to minimize the final jerk.
Enter turns early and gently. Avoid unnecessary corrections. Exit smoothly.
Keeping a constant speed reduces energy consumption dramatically. Use cruise control where possible.
GoSmooth uses the iPhone’s built-in accelerometer and gyroscope.
Values below ~0.1 g are considered smooth.
Values above 0.4 g typically indicate emergency or very dynamic driving.
Long maneuvers can accumulate sensor drift. GoSmooth compensates these effects to keep scoring fair.
To ensure comparability across cars, GoSmooth uses:
Resulting values are normalized and reflect your driving behavior — not exact fuel consumption.
If you ever feel like having some fun behind the wheel and really want to enjoy the acceleration forces, make sure you choose the right road for it! Be sure not to endanger or obstruct anyone. But keep in mind: even when driving fast, the same principle applies — maneuvers are smoother, safer, and more predictable when they are executed smoothly. Especially when maneuvers follow each other quickly, it’s important to handle so-called load changes smoothly — not abruptly. A load change occurs when acceleration forces suddenly shift direction, for example when transitioning from a left turn into a right turn. Abrupt load changes can quickly lead to a switch from static friction to sliding friction, making the car unstable and harder to control. So smooth driving is especially important during sporty or dynamic driving!