Hi! I understand you're having trouble with the Da Fit app's vCard feature rejecting QR Code images. It sounds like you're asking if there's a specific QR Code format required for this feature. Is that right?

To help you better, could you tell me a bit more about the QR Code you’re trying to use? For example:
- Did you generate the QR code yourself or got it from somewhere else?
- Is it specifically created as a vCard QR Code, or is it a different format?
- Are you seeing any error messages when it gets rejected?

Generally speaking, for vCard QR codes to be accepted by apps like Da Fit, the QR code must encode the contact details in the proper vCard format (a standardized text format for electronic business cards). Many QR code generators have a template specifically labeled "vCard" to ensure the data is formatted correctly.

If your QR code isn't using the vCard format or is using a non-standard QR code, the Da Fit app might reject it. You can try these steps:

1. Use a reputable QR code generator that supports vCard format explicitly. Sites like me-qr.com provide easy options to create vCard QR codes by filling in your contact info5.

2. Ensure the QR code image is clear and of sufficient quality for scanning. Blurred or low-resolution images may not scan properly.

3. Confirm the vCard version used is compatible. Most apps support vCard versions 2.1 or 3.0, which cover basic contact details.

4. Try scanning the QR code with another QR scanner to verify it's properly encoded with vCard info. If other scanners fail, the code may be the issue.

If you'd like, I can guide you through making a proper vCard QR code that should work with the Da Fit app. Does that sound good? Let me know what you tried already, and we can go from there!