Where are the best places to put a QR code by a startup to get the most app downloads?

It's an interesting idea but will people scan random QR code? Nowadays QR codes digital scam are also on rise. So users will not feel safe to do this.

The best places for a startup to put a QR code to maximize app downloads include popular local venues, on their website, in social media ads, on business cards, in email newsletters, on direct mail flyers, on product packaging, at conferences or trade shows, and in traditional media outlets such as newspapers, magazines, and billboards, as these locations ensure maximum visibility and engagement from potential users.