COMEWhy a matching COME APK size is not a complete check
A file size is a useful comparison field, but matching a listing does not prove a file's identity, completeness or safety by itself.
Check transfer status too
Use the browser's completed state as one checkpoint. Compare the displayed size with the offered file's current details, allowing for rounding and different display units. An interrupted download can leave a local item that looks plausible at a glance.
Keep identity separate
Two files can have the same name or size while containing different data. Do not treat those labels as a publisher guarantee. Check the route used to obtain the file and Android's installation identity and warnings.
Describe uncertainty accurately
If the transfer finished but another check fails, report both observations. Do not rename or pad a file to match a number. A current listing is a reference for comparison, not a substitute for the device's checks.
A useful next step
Use source, transfer state and Android's result together before proceeding.
Related: COME APK update conflicts and package identity