In case you're not aware...

If you do an internet search for "Flem" you get:

Did you mean: phlegm

Listen to pronunciation. (flem) A more than normal amount of thick mucus made by the cells lining the upper airways and lungs. A buildup of phlegm may be caused by infection, irritation, or chronic lung disease, and can cause discomfort in the chest and coughing.

Also: phlegmy

n. 1. Thick, sticky, stringy mucus secreted by the mucous membrane of the respiratory tract, as during a cold or other respiratory infection. 2. One of the four humors of ancient and medieval physiology, thought to cause sluggishness, apathy, and evenness of temper.

So while the idea of this app sounds amazing you may be looking at a Brand Name problem due to undesired association with the above. (I'd never heard of #2 above, but that's a hard ask of people to associate your app/work with such an obscure reference instead of the common one.)

Note that "Wefwef" was rebranded as "Voyager" due to community feedback on "wefwef" being nonsensical. Turns out the dev. named it that initially because that's what his hand typed out on the keyboard since he really didn't have a name prepared.