The ’round-off’ feature on the Jar app automatically rounds up your daily purchases to the nearest 10 or 100 rupees and invests the difference in digital gold. For example, if you make a purchase of ₹47, the app can round up this amount to ₹50, and the extra ₹3 would be saved as an investment in digital gold. This feature allows users to save small amounts of money frequently without having to think about it, gradually building their digital gold savings over time.