For many college students across the country, finals are approaching and creating a lot of extra stress. The sources of this stress can stem from getting all of your study materials made and organized, forming study groups, and/or figuring out the lowest grade you can squeak out on the final to keep your current grade. I have found three apps helpful going into my third round of college final examinations and hopefully they will be beneficial to you as well.
1. StudyBlue (free)
I found this website in high school, actually, when I was trying to find online flash-card makers. What I didn’t realize was the powerhouse study tool that this website would become. StudyBlue has since expanded into their app and has a database of already made flashcards from previous students available. For the English course I am in now, I’ve had the correct flashcards to study from this entire semester thanks to a previous student making them public on StudyBlue. They also have a function to keep notes (written and recorded) on the site or on your phone—they both update simultaneously. I’ve only had it crash on me once—last year during the peak of finals time—but other than that one incident, StudyBlue has been reliable and an extreme time-saver when it comes to studying efficiently. 
2. Final Exam Calculator (free)
Final Exam Calculator is a very basic and useful app that lets you calculate what grade you need on your final exam. In the same vein, check out GPA Calculator (free) to figure out what grades you need in your courses to get your ideal GPA.
3. OOHLALA (free)
OOHLALA is a little more interactive in that it connects you via Facebook to your classmates. This application is good year-round in that you input your schedule, it sends you push notifications about when you should be attending meetings, and you have the ability to say that you are studying for a class and would be available to study with another available classmate. It automatically imports your Google Calendar (I suggest un-checking the birthday notifications, they got old really quickly). Once you import your schedule, you can time your studying with their study timer/calculator, which suggests studying for 25 minutes, taking a 5 minute break, and then starting again. It tracks your studying over the semester as well. I found this really helpful when test time came. and it motivated me to avoid the distractions of my phone and other websites.
I hope this gave you some ideas for your studying, and I wish you the best of luck.