This is a very important dua to learn as Ramadan is coming soon! Here is the dua for Iftar. It is recited by Saad Al Qureshi.
اللَّهُمَّ اِنِّى لَكَ صُمْتُ وَبِكَ امنْتُ وَعَليْكَ تَوَكّلتُ وَ عَلى رِزْقِكَ اَفْطَرْتُ
Allahumma inni laka sumtu wa bika aamantu wa alayka tawakkaltu wa ala rizq-ika-aftartu.
O Allah! I fasted for You and I believe in You and I put my trust in You and I break my fast with Your sustenance.