𝐃𝐚𝐲 𝟑𝟑 — 𝐓𝐡𝐞 𝐌𝐨𝐬𝐭 𝐂𝐨𝐦𝐦𝐨𝐧 𝐌𝐢𝐬𝐭𝐚𝐤𝐞𝐬 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫𝐬 𝐌𝐚𝐤𝐞 𝐰𝐢𝐭𝐡 𝐁𝐋𝐨𝐂, 𝐌𝐕𝐕𝐌, 𝐏𝐫𝐨𝐯𝐢𝐝𝐞𝐫 & 𝐆𝐞𝐭𝐗

After years of building Flutter apps, I’ve realized —
the problem isn’t the architecture.
It’s how we use it.
Here are the 6 biggest mistakes I see developers make

𝟏. 𝐌𝐢𝐱𝐢𝐧𝐠 𝐔𝐈 𝐚𝐧𝐝 𝐋𝐨𝐠𝐢𝐜
Putting http calls or business logic directly in widgets breaks separation of concerns.
👉 Keep UI reactive, logic in BLoC/ViewModel, and data in Repository.

𝟐. 𝐀𝐏𝐈 𝐂𝐚𝐥𝐥𝐬 𝐖𝐢𝐭𝐡𝐨𝐮𝐭 𝐋𝐚𝐲𝐞𝐫𝐬
Don’t call APIs directly in your BLoC.
Use a structure like:
𝐴𝑃𝐼 → 𝑅𝑒𝑝𝑜𝑠𝑖𝑡𝑜𝑟𝑦 → 𝐵𝐿𝑜𝐶 → 𝑈𝐼

𝟑. 𝐋𝐨𝐜𝐚𝐥 𝐃𝐁 𝐃𝐢𝐫𝐞𝐜𝐭 𝐀𝐜𝐜𝐞𝐬𝐬
Never call Hive or SQLite directly from UI.
Create a LocalDataSource and connect it through Repository for offline-first design.

𝟒. 𝐎𝐯𝐞𝐫-𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 𝐓𝐨𝐨 𝐄𝐚𝐫𝐥𝐲
You don’t need enterprise architecture for a to-do app.
Add layers when needed — but name and structure them consistently.

𝟓. 𝐏𝐨𝐨𝐫 𝐒𝐭𝐚𝐭𝐞 𝐃𝐢𝐬𝐜𝐢𝐩𝐥𝐢𝐧𝐞
Whether using Provider, BLoC, or GetX — manage rebuilds, close streams, and dispose controllers properly.

𝟔. 𝐓𝐫𝐞𝐚𝐭𝐢𝐧𝐠 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 𝐋𝐢𝐤𝐞 𝐚 𝐓𝐫𝐞𝐧𝐝
Frameworks change — good architecture stays.
Predictability > Perfection.

I’m applying all this to my 180 Days Challenge — building 𝐊𝐢𝐭𝐚𝐚𝐛 𝐊𝐢𝐨𝐬𝐤, a 360° book ecosystem app.
𝐶𝑙𝑒𝑎𝑛 𝑎𝑟𝑐ℎ𝑖𝑡𝑒𝑐𝑡𝑢𝑟𝑒 𝑓𝑟𝑜𝑚 𝑑𝑎𝑦 𝑜𝑛𝑒 ℎ𝑒𝑙𝑝𝑠 𝑎𝑣𝑜𝑖𝑑 𝑐ℎ𝑎𝑜𝑠 𝑙𝑎𝑡𝑒𝑟.

𝑹𝒆𝒎𝒆𝒎𝒃𝒆𝒓:
𝒀𝒐𝒖 𝒅𝒐𝒏’𝒕 𝒏𝒆𝒆𝒅 𝒑𝒆𝒓𝒇𝒆𝒄𝒕 𝒂𝒓𝒄𝒉𝒊𝒕𝒆𝒄𝒕𝒖𝒓𝒆 — 𝒋𝒖𝒔𝒕 𝒂 𝒑𝒓𝒆𝒅𝒊𝒄𝒕𝒂𝒃𝒍𝒆 𝒐𝒏𝒆.

Image is depicting the simple and powerful flutter app structure, hope it will help...