Support & Frequently Asked Questions

1. How much RAM and storage space are required?

Hardware requirements depend on the model profile selected:

• Storage: You need between 1.2 GB and 3 GB of free internal disk space per downloaded model.
• RAM: We recommend at least 4 GB of RAM for Qwen3.5-2B and 6 GB or more for Gemma 4 E2B and Qwen3.5-4B, so the OS does not kill the app. These are estimates, not measurements across all phones; low-end devices may be slow.

The app automatically conducts a device pre-flight check before you start downloading.

2. What if model downloading is slow or fails?

Model weights are large files (> 1 GB) downloaded from public hosting (Hugging Face). If interrupted:

• Ensure a reliable, unmetered Wi-Fi connection.
• Check that your device has sufficient free internal storage.
• Tap Resume (Tiếp tục) to try continuing from where the download stopped. After the download completes, the app verifies the file (SHA-256); if it does not match (for example after a connection drop mid-download), the app deletes the bad file and you will need to download it again.

3. Why does the AI sometimes produce incorrect answers or switch languages?

Compact on-device models have smaller parameter sizes compared to giant cloud servers. In ambiguous queries or queries without Vietnamese diacritics, the model may occasionally switch languages or hallucinate facts. Formulating specific, well-punctuated prompts yields much better results. Always verify critical facts.

4. Does Túi AI work offline?

Yes. Internet is required only once to download the model weights file. Once verified on your device, you can converse with the AI without an internet connection after the model is downloaded.

5. How do I delete my data and chat history?

You can delete individual chats from History, or delete all conversations and settings in Settings → Data → "Xóa toàn bộ dữ liệu ứng dụng" (clear all app data). Read our complete guide at Data Deletion Guide.

6. Is conversation data sent to servers?

No. In this version, conversation data is not sent to our servers. The app has no account database and integrates no advertising or analytics SDKs. All chat data stays on your physical device.