Muun Wallet 4+

Nice simple wallet, one privacy flaw

Overall a nice simple wallet. However when tapping on “Receive”, Muun automatically checks the contents of your clipboard. Don’t know why or what it’s doing with what’s in there but this is poor privacy form. Please change this behavior.

Update: developer contacted me to explain that Muun is checking for a BTC address or LN URL which is why it’s reading clipboard. This is poor privacy form. iOS provides an API to check for the existence of a URL. This is all that should be done without user action. The contents of the clipboard themselves should only be read on user action.

Developer Response ,

Hello! You mean when you tap Receive and the scan button (LNURL) right? If that's correct, this is because Muun's checking if there's a Bitcoin address / LNURL in your clipboard to offer you to use it. Same happens when tapping on "Send". Please notice that this is a client-side verification only. You can verify this in our source code: https://github.com/muun/falcon

Easy to use. Secure.

Great backup option. Very secure hot wallet. The support of Lightning Network is essential. My biggest complaint is that it cost the same amount of satoshis to send from the Lightning wallet as it does from the Bitcoin wallet in MUUN. If that is fixed then this would be tied for if not the best hot wallet.

Update: I greatly appreciate the response. Now I understand the submarine swap infrastructure. The fees make sense. Since you don’t collect fees I can’t see this wallet being anything but a gift to society. In that, I greatly thank you. I would love a way to add money using Lightning and then spend from that instead of L1.

Developer Response ,

Hi Manikase, thanks for reaching out and for your detailed message.

Lightning transactions pay a network fee that depends on several factors, including the size of your payment, its route, and the funds you're using.

Additionally, at Muun, some Lightning payments may carry a higher fee if your wallet needs to perform an under-the-hood Bitcoin transaction to complete it because of our submarine swap infrastructure (https://blog.muun.com/a-closer-look-at-submarine-swaps-in-the-lightning-network/). While this implementation offers rock-solid security and self-custodianship guarantees it also implies that some payments require an under-the-hood on-chain transaction with its fees.

We're always working on reducing these to make all payments cheaper and faster. Also, please notice that Muun doesn't collect any of these fees.

Let me know if this sheds some light on how Muun works.

Do not hesitate to write to us at support@muun.com if you have any further questions or suggestions. We'll keep improving!

A good app but can be better

I sent btc to an address using the lowest fee option and it took like forever to be confirmed. I think that needs to be worked on. If you give option for flexible sending fees then, such transactions should be given priority as well.
In all well done guys.