People who regularly shop in Carrefour and other supermarkets just across the border fill their shopping baskets with essential goods for much less than they would have to pay for the same merchandise in Geneva (and elsewhere in Switzerland as well). If you want to save money on some food items (without going to France), download the Too Good to Go app, which will allow you to buy various foods for a much lower-than-original price. While the water taxi is used by local residents as a public transport mode, if you are a tourist staying in a hotel, hostel, or camping in Geneva, you will benefit from ​Geneva Transport Card, which gives you unlimited travel around the city for the duration of our stay.