@erAck I can completely understand it. For me it was also a long process until I decided to finally do it. At the end I thought this are quite good arguments. https://www.openkeychain.org/faq/#are-my-secret-keys-safe-on-my-mobile-device. Finally I come to the conclusion that as long as I'm not target the key is not notable less secure on my free Android than on my Laptop, if I'm target I have lost in both cases.
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