What do I need to improve my Internet speed on wireless devices?

I'm gonna tell the problem i have and if you could tell me what you would buy to improve it. I have a fast internet speed FIOS Quantum 75/35 mbps. My router is in the basement. When i do the speed tests on wireless devices (macbook and pcs) i get a speed of only about 17/4mbps & for smart phones and tablets 0.82/0.3mbps. However the speed doesn't feel slow on computers, and laptops that are connected wirelessly through Wi-Fi. But smart phones and tables (iPhones, androids, tablets, iPads, ipod touch) are slow with Wi-Fi, the signal is only about 2 bars or 1.

So what would i need to do to fix this? Would the NETGEAR - Universal Wi-Fi Range Extender with Ethernet port help improve the situation, or the Apple Airport Express or signal boosters?

I dn't think i would need the Apple Airport Extreme because i'm not looking for storage or anything i just want my wireless devices to be fast. If you could give me your input on what you would get if you were i

i forgot to mention that i use these devices mostly in the 2nd floor and 1st. Never in the basement.

Added (1). @David E i own an iPhone and the app store does not have WiEye app. Is there any other app i can check out?

Is the lifeproof case worth the money? - 1

I have the iPhone 5 and I want to get the lifeproof case. But is it worth the money? What is the good and bad? And what is the difference between the lifeproof nuud and the lifeproof fre?

How much does 16gb hold in the iPhone 4?

I want to know how much music pictures apps 16gb holds? My phone just like blew up and my mom doesn't want to pay 200 dollars for a phone when around Christmas rumors have been heard about the iPhone 6 so would the iPhone 4 16gb last me until Christmas when I can get the iPhone 5 or 6?

Added (1). IPhone 5s not six sorry

Can I restore my iphone on a different computer?

Dropped my Iphone 5 in the sink, but I got a 4s a week later, I backed up the 5 to my computer, but a snake came into my room and it scared me so I jumped and smashed my computer screen. Can I 'restore' my new iphone 4s on a different computer, but still on the same itunes account? (P.S. The snake thing is not a troll, some how it got in my house and I hate snakes haha) Thanks.

Can't connect to iTunes because I've forgotten my password?

I had an iPhone 3G / 3GS a while ago and it had a passcode on it. Then I got a BlackBerry which has now broken, so I decided I wanted to go back to using the iPhone. The only thing is I've forgotten the passcode. I Googled what I should do and it said I have to connect the iPhone to iTunes and reset it. Which I was quite happy to do, but every time I connect it to the computer a message pops up saying it can't connect to iTunes because you need to type in the passcode, WHICH I DON'T KNOW. Can anyone help!