From: mariasophia@comprehension.com   
      
   Qihe wrote:   
   > https://usb-scanner.soft112.com/   
   >   
   > It's not available (at least on google play store).   
   > And it seems there is no alternative android app for usb-otg   
   >  scanners, is it?   
      
   Hi Qihe   
      
   Happy New Year!   
      
   I know less than nothing about on-the-go use models, but I looked it up for   
   you so everything I say below isn't from me, per se, but from the results.   
      
   My search tentatively confirms your observation though, that the specific   
   "USB Scanner" app from Soft112 is not available on Google Play anymore.   
      
   Apparently, there is no true Android app that can turn a USB-OTG handheld   
   scanner (like a USB barcode scanner or USB flatbed scanner) into a   
   plug-and-play scanning device.   
      
   The apps that do exist only seem to handle USB storage, not USB   
   imaging/scanning hardware such as this ad-supported example.   
       
   (It's just an example - I'd look for FOSS scanners if I had time.)   
      
   I looked up what USB-OTG scanners need in order to work on Android.   
   It seems USB scanners (such as barcode guns, flatbed scanners, document   
   scanners, etc.) expect three things to be available from a desktop:   
    a. A full USB driver   
    b. A TWAIN/WIA interface   
    c. A desktop-class scanning API   
      
   Apparently, Android does not support these protocols natively, so we might   
   wonder if the Soft112 USB Scanner listing wasn't misleading in the 1st   
   place as I can find nothing in a quick search that does the claimed tasks.   
      
   Android can use USB barcode scanners (HID mode) because they act like a   
   keyboard, and Android can use Wi-Fi & Bluetooth scanners because they   
   generally have their own Android apps, and some apps, like Adobe Scan, &   
   Microsoft Lens use the phone camera, but not the USB hardware.   
      
   I could be wrong as I ran only a quick search, but from that one search   
   results, I could find no Android app that supports USB-OTG document   
   scanners or flatbed scanners. Instead I found only USB storage and HID   
   barcode scanners.   
      
   I can run a more detailed search later as I have to run right now.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)