Pin & Arrange Favorite xApps to Drawer
A very convenient feature would be to enable users to pin their favorite xApps to the drawer at the bottom of the XUMM GUI. The quick selection drawer could remain a small subset of xApps (4-6) as it is now, except the user chooses which ones will appear in that area. The full list of xApps in the "More xApps" section should also show the default xApps, plus any additional ones that have been pinned by the user. The user should also be able to arrange the icons in their desired order. This will build on the new (and great) xApp History feature that was recently introduced by taking it a step further, and include beta xApps as well. Bonus related suggestion: This one is not as important IMO, but it would be cool to scroll sideways through your xApps within the pop-up drawer at the bottom of the screen, instead of having a static number of icons. This would save taps and reduce (or even eliminate) the need to open the full "More xApps" screen.
Rate Refresh in Exchange
In the Exchange page, a refresh button should be available, which refreshes the rate and recalculates the exchange amount. Prior to 18.104.22.168 update, it was possible to touch the "Switch" button twice, and the effect was refreshing the exchange rate. After the 22.214.171.124 update, if you "Switch", the numbers will reset to zero, and you must enter the exchange value again.
180 degree screen rotation
(based on ios version) Obviously, it will be very useful if XUMM rotates when the mobile device rotates. Also, 90 degree rotation may be added, which needs a landscape design (instead of portrait).
Gray out added trustline and label (added)
In the adding trustline list, currently it will hide the added trustline. My suggestion is, instead of hide it, how about gray out the option. Use cases: I have owned CSC and I try to show my friend how to add CSC to their wallet. I can’t use my phone or wallet to showcase the CSC option on the adding list. When more trustlines available in the future, some users might forget they have already own it and when they it is gray out. They know the trustline is supported instead of struggling when to find it.
Screen Reader Compatibility (accessibility)
Enable screen reader compatibility for people with visual impairment.
Sign a payment to multiple accounts at once
Owning a small business I need to pay several staff at once. An option to pay multiple people from one screen over entering separate payments person by person would be a key feature for someone like myself. Eg. make a payment template, multiple destinations and amounts, and sign once, sign and submit all.
Hardware Security Key Support
Allow unlocking or authorizing large transactions with U2F Hardware Security Key, like a Yubikey per example. Where you want a hot wallet with a bit more security then face/finger/ or passphrase. This is a useful feature found in many phone and desktop password managers.
Add support for NFC payments
Include an option to use NFC for payments as I have not seen anyone do this yet.
Currently the ability to exchange tokens on the DEX is limited. The ability to set limit orders or to adjust the amount to be offered for an asset would be quite helpful. As an example when selecting the XTK asset you cannot adjust how much you are willing to pay for each XTK. Toast wallet has some of these features that XUMM is missing.