Nobody rings a bell
Everyone's plan is to buy low and sell high. In practice, humans do the opposite with impressive consistency: money floods in after markets have already risen and flees right after they fall - selling low, buying high, repeatedly. Professionals with terminals and teams get this wrong. The market's best single days tend to land in the middle of its scariest weeks, so being out 'until things calm down' is how you miss them.
The variable you control
You cannot control returns. You control when you start and whether you keep going - and those two choices dominate everything else. In the app's own example, R450 a month for 30 years is R162 000 put in and R823 834 at the end. Start ten years later and the ending shrinks dramatically - not because the market changed, but because the longest-serving rands do most of the work. The first rand you ever invest is the hardest working one you will ever own.
Automation is how you keep going
Knowing all this changes nothing in a panicky March. Automation does. Round-ups and a recurring amount keep investing on schedule through the scary weeks, the boring months, and the years when you forget the app exists - which is precisely the behaviour the whole game rewards. Save without deciding to save. Stay in without deciding to stay.
Projections are estimates based on your current contributions, not guarantees. Your capital is at risk.