How to stop apps from going from one device to the other?

Okay, so i just recently got a new iphone c.
When ever i download apps on it, it goes onto my moms ipad. I know it's because we're using the same apple id but on my old iphone 4s, it didn't do that. Same id, password, everything. Is there a way to stop them from going onto my moms ipad? My friend said there's a way to but i don't know if i should believe him.ty.

How to ship items at the post office?

I have an iphone 4 that i want to ship to a friend and i'm have a local usps office near me, but i have never shipped a physical item before. Does anyone know how the process works?

Differences between iPhone 4 and 5s?

Hi, other than the camera, fingerprint sensor, improved processor chip(s), 4g capability and siri, are there any other major feature improvements?

Just asking as i currently run an iPhone 4 but expecting my new iPhone 5s delivered this week

How long should I keep my iPhone in rice after being dropped in the toilet?

I know it sounds stupid but i tripped and my phone when flying into the toilet. It is in an otter box defender case at the time so not much water got in, only got the outside of the camera, the speaker and 2 mics. It was in there for 3-5 seconds before i pulled it out. I quickly got a bowl of rice and it has been sitting in it for about an hour now. I need my phone As soon as possible when can i pull it out of the rice? I know as long as possible but will 15 hours be enough? Also should i put it on a coil radiator when i go to sleep tonight?

Thanks

Added (1). I also powered it off 5 minutes later

Restore downloaded Apps on iPhone?

I downloaded an app from Safari (not on the App Store).
Will this app back up on my computer also?
If I restore my phone and then restore backup, will it still be there?

What happens if you replace the logic board on an iphone?

I have a Verizon iphone 4s. The logic board is in perfect condition and so is the SIM card, but it is the outer components that are requiring me to get a new phone. I want to just replace the logic board and SIM card from the new phone with my old ones. Is this possible?
And once I receive the new phone, can I just install my original logic board and SIM card or should I try to activate the phone first?

Added (1). Thats how my problem started! I ordered a new front and back glass because i wanted to change it to a fancy color. And when i was trying to place the front screen one of the cables straight tore, so i ordered a new phone. When i get the new phone and if i install the motherboard and sim card (i have both in perfect condition) will it work in the new phone with all of my information and data in there?

Music on iPhone 5 disappeared?

I have close to 1, 000 songs on my phone and when I tried to listen to my music today none of them would play aside from 3.It would scan through my music, song by song, until it eventually gave up and closed out. After restarting my phone several times and trying to google my problem I waited until I got home to look into the problem any further.
When I got home the only songs that even showed up at all were the 3 that played earlier. When I plugged my phone into my computer all of my songs show up.
What has happened and how can I solve this problem?

Added (1). I have iOS 7 and a 32 GB phone so memory shouldn't be an issue.

How much does an iPhone 5s cost?

I don't have an upgrade right now, but someone new is joining my contract. I plan on getting the iPhone 5s with them joining since it will be cheaper, and they will take my current iPhone then just switching the numbers. Can I do that? How much will it cost? I have Sprint.