I'm sure you know about Whatsapp. Whatsapp was not available in iPad AppStore. To achieve this, change Info.plist file, right-click -> Open as -> Source Code

Then search for UIRequiredDeviceCapabilities, most probably you will see

Info.plist

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<key>UIRequiredDeviceCapabilities</key>
<array>
<string>armv7</string>
<string>telephony</string> <!-- ADD THIS LINE -->
</array>

It means this app only support for those device which can call.

References: