any way to activate freepackages with steamdb from android?

Use Yandex browser or Kiwi browser
I would recommend Yandex one, it installs chrome add-ons and works with them pretty much flawlessly

You would need to get the ID number of the "Free on Demand" package for the game (example: https://steamdb.info/sub/113665/ for https://store.steampowered.com/app/497640/Trick__Treat/), then:

Go to in browser: https://store.steampowered.com/account/licenses/

Enter javascript:AddFreeLicense(113665) in the URL bar.

where 113665 is the ID.

I can add this stuff on my mobile app. I will consider this feature.

I know that there is a way to do that on mobile/TV/tablet etc. (Android OS) but your device has to be rooted. All you have to do this getting your session-id¹ from the browser's (the one your favorite browser you use to log into your steam account) database. Once you get your session-id (make sure that you've get the correct one; "store.steampowered.com" not the "steamcommunity.com") Then you can follow this link; https://store.steampowered.com/checkout/addfreelicense?subid=‹subid›&sessionid=‹sessionid›
For example a random app; the package/sub (Type: Free On Demand (12)) is: 643141 so replace ‹subid› with subid and ‹sessionid› with your sessionid so it is: link
Open the URL with the browser that you've logged in.
Profit!

¹: For Chromium: If it is an encrypted cookie, you have to decrypt first or use an old version of Chromium engine based browser. For stock browser; use an old webview.

PS: Example; how to get your session-id:

• Open Terminal
• Type "su" to gain root privileges. Without quotes of course!
• Type 

  sqlite3 -line /data/data/com.android.browser/app_webview/Cookies 'select * from cookies where host_key="store.steampowered.com" and name="sessionid"' | grep -w 'value' | xargs > /storage/emulated/legacy/session-id_store.steampowered.com.txt

Now open the file which is in the internal sd, copy the "value" and replace it. Done! Simple as that!

Another question comes to my mind, is there an ASF command that does the same steamdb extension to add free packages? but I do not mean one by one but automatically.
all this I mean now in clear windows with ASF.