Isekai wa Smartphone to Tomo ni.

When a freak bolt of lightning cuts his life short, Touya Mochizuki finds himself face-to-face with God. As an apology for the cosmic error, the deity offers Touya a second chance at life in a vibrant new world, along with one special request: to bring his smartphone with him. Now, armed with divine blessings and the ultimate portable device, Touya embarks on an unexpected adventure. In this fantastical realm of magic and monsters, Touya's smartphone becomes his greatest asset, offering unparalleled convenience and a touch of modern anachronism to his journey. As he explores, makes new friends, and perhaps even finds a little romance, Touya discovers that even in a world brimming with ancient secrets, a little bit of technology can go a long way in shaping his destiny.

✦ AI-drafted summary