Follow the guide to develop a grocery delivery app at an affordable cost with the help of a custom grocery delivery app development company. According to a report, online grocery sales are set to grow by 40% in 2020. The COVID-19 pandemic has pushed every individual into lockdown, which directly increased online grocery sales. Most of the online sales were completed in-home delivery. With the world still stuck in the pandemic, the numbers are expected to increase in the forthcoming months.