I haven't seen this in the thread so here is my question. If I have a Sustaining Focus for Increase Attribute (Willpower) force 4 this should raise the stun and drain values. The other is a Force 4 Sustaining Focus for Increase Reflexes should increase the Initiative stat and the dice pool. I don't see a way to do this in the Chummer app. Am I missing something or is this not available?
Thanks for building Chummer5 this is going to be a great help!
It's there, it's just hard to find.

In Career mode, go to the Improvements tab (it should be on the far right).
Click Add Improvement and select Attribute from the first dropdown.
Enter into the Name "Increase Attribute (WIL)" or whatever you like as the name, click the Select Value button and select WIL, And increase the Value field by the Force of your spell. Click Ok.
That'll increase your Willpower by the value of your spell and all things affected by Willpower will use your improved value.
For the Increased Reflexes, we'll use a similar approach... Click Add Improvement and select Initiative from the dropdown.
For the Name field, I usually enter something like "Increase Reflexes". For the value, enter the Force of your spell. Click Ok.
Ok, that added the Initiative bonus, now we need to add the dice bonus. Click Add Improvement again and select "Initiative Passes" from the dropdown. Yes, I know that's old terminology and we're using Initiative Dice now, I just haven't updated this section yet.
For the Name field, I usually enter something like "Increase Reflexes (dice)". For the value, enter the Force of your spell/2 rounded down. Click Ok.
There ya go... you now have the permanent effects of an Increase Attribute (WIL) and Increase Reflexes spell. If you need to disable either or both, go back to the Improvements tab and you can click on or off the Active checkbox on each improvement as you will or delete them if they're no longer appropriate. You can also group the improvements together such as the two initiative improvements for your Increase Reflexes spell.