Unable to download apps on wifi

You can try this trick:

1. Go to Settings

2.Tap General

3. Tap Date and Time

4. Set Automatically>Off.

After that set the date one year ahead.

Then try to download or update the apps again. If you get an error message, go back to the settings. Correct the date and time (set automatically) then go back and try to download or update the apps again.

This should help you.

Below are some general suggestions for Wi-Fi issues. I suggest starting from the top and working down, maybe they will help....

1) Perform a Forced Restart: Hold down the Home and Wake/Sleep buttons at the same time for about 15-20 seconds until the Apple logo appears. Allow device to restart.

2) Reset Network Settings: Settings > General > Reset > Reset Network Settings. Rejoin the Network again.

3) Reboot Router/Modem: Unplug from power for 2 minutes and plug again. Update Router Firmware (check manufacturer’s support website for a newer FW). Also try different bands (2.4 GHz and 5 GHz) and different bandwidths (20 MHz recommended for the 2.4 band).

4) Change to Google's DNS: Settings > Wi-Fi > Click on the Network, Delete all numbers under DNS and enter 8.8.8.8 or alternatively 8.8.4.4

5) Disable device prioritization on the router if this feature is available.

6) Determine if other Wi-Fi devices on network are working well (other iOS devices, Macs, PCs).

7) Try device at another Network, i.e., neighbors’, public coffee house, etc.

8) Restore the Device (ask for additional for details if desired).

https://support.apple.com/en-us/HT201252

9) Go to an Apple Store for hardware evaluation.

User Tip: https://discussions.apple.com/docs/DOC-9892

BTW, there were several news items on the tech rags yesterday warning that the App Store was on the blink, so you might just have gotten unlucky.

Quote from The Mummy: "Patience is a virtue..."