This version keeps the tool intentionally simple: a rough but more honest decision aid for buying a car versus staying flexible with a mix of car-sharing and Grab. It now separates the maths engine from the UI, shows a live summary earlier, and labels the rough parts more clearly.
This keeps lifestyle questions light. The selected profile shapes a small convenience weighting and prefills usage assumptions, but the main recommendation still comes from cost plus a modest fit adjustment.
Fixed access. You pay depreciation, loan interest, insurance, road tax, parking, petrol, servicing, and repair risk whether you drive much or not.
Use car-sharing for the times you need car control, then use Grab for simpler point-to-point trips. The slider later reallocates the same transport demand between those two modes.
1 Grab ride is treated as roughly 1 hour of private-car need. This is a simplification, not literal ride duration.
A full-day rental counts as 10 hours of car access to reflect real idle time during the day.
Break-even numbers are back-of-the-envelope guides, not a pricing engine.
Estimate a normal week without owning a car. The slider does not add trips. It just shifts the same weekly demand toward more car-sharing or more Grab.
Each full day is treated as 10 hours of car need.
Use for work days or long errand days.
For groceries, family runs, short errands, meals.
Used as a rough proxy for point-to-point car demand.
Your baseline pattern stays fixed in total demand. The tilt slider just changes which share goes to Grab versus car-sharing.
Left: more car-sharing. Centre: baseline. Right: more Grab.
This still assumes a simple Singapore-style flat loan when financing is enabled. Used cars work fine too if you adjust price, exit value, and holding period.
These are generic defaults. This step makes the hidden assumptions more explicit so the tool feels less like a black box.
The defaults are deliberately conservative. Efficient bookers may pay less than shown here.
Adjust the wizard to see the recommendation.
The recommendation balances monthly cost with a small profile-based convenience weighting.
Owning is compared against the flexible mix, with car-sharing and Grab shown inside the mix.
Monthly cost split for buying a car.
The simulator keeps the same baseline transport demand and reallocates it between rental hours and Grab rides.
Best for spontaneous access, family logistics, keeping things in the car, multi-stop errands, client visits and late-night flexibility. You carry fixed cost and repair risk.
Best when trips are planned and uneven. Use car-sharing when you need private-car control, then use Grab when parking and coordination are more annoying than the ride itself.
It does not fully model surge, waiting time, trip chaining, rain-day pain, parking search, or the emotional value of always having a car.
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