This app was mentioned in 10 comments, with an average of 1.50 upvotes
Yeah, you are right. We should have made things clearer. Bither is a Bitcoin wallet app that works on both hot and cold mode. Here is the App Store link and Google Play link.
What you're looking for, it's called Bither. Use your old mobile as a cold storage hardware wallet. Use your current mobile as a hot spending wallet and as a monitor to your cold storage. Use the two together to authorize transactions out of cold storage.
Google Store Link
It's a wallet app for Android / Apple devices. It seems like since their latest iOs update, you can create your own private keys by rolling a dice (in-app)
I've been using Bither for cold storage purposes, it's really handy!
After replacing the screen on my old Nexus 5, I've personally started to use a two phone solution with Bither. One phone is an offline cold storage like a Trezor.
Follow up question: What software do you use on your computation-able devices and for what purposes?
I'm looking for a good way to spend from cold storage (offline, naturally). I've looked a bit into the Bither wallet
There's Bither but it uses QR codes rather than NFC or Bluetooth.
Check out Bither. Maybe that's what you're looking for.
Buy a cheap, used, smartphone and run Bither on it.
�� I was joking dumbass. Who TF is actually that stupid...
But seriously OP, download this app: https://play.google.com/store/apps/details?id=net.bither, and in the settings you'll see an option labeled "import private key", select it and enter whatever keys you have. Then, there is another option labeled "get fork coins", which will send the forks to a BitPie address (another app you'll need for this: https://play.google.com/store/apps/details?id=com.bitpie).