It's not obvious where this app came from. According to the answer to this question, it probably is an app that was incompletely synced with iTunes.
There's nothing to worry about, and you don't need to do anything about it.
Answer from Carl on Stack ExchangeWhat does NULL mean | MacRumors Forums
applications - In my iPad settings there is an app called null what is it? - Ask Different
Null in my contact - Apple Community
Text messages from my own number that just say "null"
How to enter iPhone passcode in null?
In fact, it is impossible to enter your iPhone passcode in null. When seeing the support.apple.com/iphone/passcode null error, you can try the above solutions to fix the error. Or you can directly using MagFone iPhone Unlocker to remove the screen passcode soon.
How to unlock iPhone in null without losing data?
If you want to unlock your iPhone in null without losing data, you can refer to the solution introduced in Part 2. Actually, it is a bit possible to fix the iPhone Security Lockout null error without losing data. After unlocking iPhone in null mode, you can restore your data and settings from a backup.
How many attempts before seeing iPhone Security Lock null?
Apple allows users to enter the wrong passcode up to 10 times on the iPhone Lock Screen. After making several attempts to unlock your iPhone with the wrong passcode, you will see an iPhone Unavailable message or a Security Lockout screen. However, when more than 10 attempts are made to enter the wrong passcode, your iPhone will be in Security Lockout null.
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It's not obvious where this app came from. According to the answer to this question, it probably is an app that was incompletely synced with iTunes.
There's nothing to worry about, and you don't need to do anything about it.
You can go to Settings-->General-->Storage&iCloud Usage-->Manage Storage. Then scroll down the apps to find null and delete it.
Hey everyone,
Today I was received 2 text messages from my number that just said "null." This was right after I sent 2 text messages which seemed to go through just fine. I was wondering if anyone knows what this means? I recently blocked a number, so I'm not sure if that is related.
Thanks in advance!
Hello Mike en route,
Sync issue is a possible reason why this concern is happening. It often occurs when authentication problems are present. A force sync is a possible fix for this issue. You can check this support article and follow the instructions provided on the thread to help solve your issue.
Update us with the outcome so we can further assist you if needed.
Bob
Hello Mike en route,
Sync issue is a possible reason why this concern is happening. It often occurs when authentication problems are present. A force sync is a possible fix for this issue. You can check this support article and follow the instructions provided on the thread to help solve your issue.
Update us with the outcome so we can further assist you if needed.
Bob
Thanks Bob! It worked
After my friend dmed me a message it created a group chat with this "lae"/(null) person. i wanted to know what this was.