Lifehack: if you walk west along Rue Antibes towards the Old Town, the price of the dishes on the menu will decrease.
Restaurants and cafes are literally at every turn in the festival capital, from the upscale Carlton Restaurant, which serves national and regional cuisine, to the democratic McDonald's. To get an idea of the prices in the establishments, pay attention to the signs with the main dishes in the menu for the day in front of the entrance.
Be sure to set aside funds to try the bouillabaisse fish soup. It's a dish you won't find anywhere else like it in Provence. If you don't have enough money to visit restaurants, go shopping in Cannes La Bocca, a suburb of Cannes, where there are many shopping centers, and make your own porridge. For 10-15 EUR you'll eat your fill.
To try the dishes of the famous cuisine: bouillabaisse, Provençale mussels in dough and others, it is worth, according to reviews, in the restaurant in Cannes called "Auberge Provençale" (Auberge Provençale). It is one of the oldest and best restaurants in Cannes.
No less prestigious restaurants are those located in 5-star hotels: "La Palme d'Or, Fouquet's Cannes and others. But it is impossible to refer them to inexpensive restaurants in Cannes. The average check here (for a three-course lunch and half a bottle of wine) is more than 120 EUR. Dinner is even more expensive. It is served from 20:00, and in case of non-compliance with the dress code you may not be allowed to the tables.
If such sums seem exorbitant for you, visit moderately priced establishments (from 60 to 120 EUR for dinner) and taste sea bass with lemon/lime juice, cod with garlic sauce and vegetables, stuffed sardines, fish fillet in pepper, grilled anchovies, paella with clams.
The cheap restaurants and cafés of Cannes are just as good. Prices at Toscana, Point de Rencontre and about three dozen other places are just enough for 10-20 EUR per person.