Many sites promising these services are scams intended to harvest data or deliver malware.
Developing a true conversion engine would require hundreds of thousands of dollars in engineering resources. No company would offer that for free, online, without monetization through ads or selling your data. The "free" tag on these converters is a red flag indicating that you are the product—your uploaded APKs (which may contain personal data or login credentials) could be stolen and reverse-engineered. apk to ipa converter online ios free
Before you click that tempting “Convert Now” button, consider the potential consequences: Many sites promising these services are scams intended