Following a post I saw from @jarrod on HeyDingus here are the default apps I use on my iPhone.

Main Apps

📨 Mail Client: Apple Mail (and Gmail)

📝 Notes: Obsidian (and Apple Notes)

✅ To-Do: Apple Reminders

🗺️ Maps: Apple Maps

📷 iPhone Photo Shooting: Halide (and Apple Camera)

🟦 Photo Management: Apple Photos

📆 Calendar: Apple Calendar

📁 Cloud File Storage: iCloud Drive

📖 RSS: NetNewsWire

🙍🏻‍♂️ Contacts: Apple Contacts

🌐 Browser: Safari

💬 Chat: WhatsApp, Apple Messages

📑 Read It Later: Safari Reading List

📜 Word Processing: Pages

📈 Spreadsheets: Numbers

🛒 Shopping Lists: Apple Reminders

🍴 Meal Planning (and Recipes): Obsidian

🎵 Music: Apple Music

🎤 Podcasts: Overcast

🔐 Password Management: Apple Passwords

Others

🤖 AI Chatbot: ChatGPT

🧑‍🧑‍🧒‍🧒 Social Media: Micro.blog, BlueSky, Instagram

🖥️ Media Tracking: Sequel, Letterboxd