Storage is typical for an average app, for instance 100mb after several years usage. Data usage would be light if used often. But it queries a Bitcoin node for relevant data, doesn't download every block to sync
#Bitcoin
This trust is eroding globally every day .. it is illogical that anyone still has any left
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#Bitcoin
Correct, custodial wallet has no benefit from lightning rules, they should never been used for more than pocket change it whatever amount you can lose without worry. There are wallets such as Phoenix and Breeze, they are lightning nodes. There are many others, but if you want the benefit of receiving without sending first, these two offer a compromise where you can do a swap from on chain to lightning. During this swap, in that moment it is custodial. But at rest it is non custodial. Anyway the point is you can run a lightning node on your phone, no need for custodial, that is only a convenience that you are trading for complete loss of funds as a possibility.
That is incorrect. When using a non custodial lightning node, there is a smart contract between the parties to ensure rules are followed. Either party can close the channel to receive the Bitcoin on chain at any time. A cooperative close results in cheaper chain fees, a force close takes more time and more fees.
