This is a question that should be directed at @PABLOF7z , unless you have other examples that you've found. We've mentioned an issue just yesterday which he's trying to fix already here:

He already addressed it, it's because he is publishing to zap.store and forgot to deploy the apk to github. Which to me means zap.store isn't simply aggregating stuff from github but instead is another place to publish APKs signed by your npub