No need for this app. simple install with adb (of botensoft keller sudoku)

[tadam98s]

If you already installed adb you can use adb to install the apk. I would assume that this is an old build that is refused by the android version.

1. Get kille sudoku apk: https://download.cnet.com/developer/botensoft/i-11173719/
2. download adb and extract the platform-tools. No need to install
3. On Android enable the developer mode: settings about, find build 7 and tap on it 7 times.
4. Connect your phone to the pc with a good usb cable.
5. Enable your Auto Blocker (it is for 30 minutes window)```
   adb devices
   List of devices attached
   RFxxxxxPT device

6. In Settings/Developer Options setiings enable USB debugging and Wireless Debugging.
7. Press last option: Pair device with paring code. This will  give you host:port and code
`10.0.0.73:32995 041514`
9. adb pair 10.0.0.73:32995 041514
`Successfully paired to 10.0.0.73:32995 [guid=adb-RFxxxxxxPT-eMhYUN]`
11. The usual install may fail: 

adb install ..\killsud.boten_6.5.apk
Performing Streamed Install
adb.exe: failed to install ..\killsud.boten_6.5.apk: Failure [INSTALL_FAILED_DEPRECATED_SDK_VERSION: App package must target at least SDK version 24, but found 4]

13. By pass the sdb block of old version:

adb install --bypass-low-target-sdk-block ..\killsud.boten_6.5.apk
Performing Streamed Install
Success

15. Suggestion: disable the USB and wireless debugging
16. Done