GraphLock is the ONLY scientific and graphing calculator app designed to be used in classrooms and on exams due to its unique Lockdown mode!

This app will turn your device into the fast and powerful tool you need to succeed in your math, physics, science and engineering classes/exams. Plus you never have to carry a separate calculator again! GraphLock is designed for education, studying at home and test environments.

The unique Lockdown feature disables phone functions (calls, texts, notification, internet, etc.) and turns the device into a calculator until the timer runs out or the authority figure (Teacher, Parent, Proctor) unlocks the user.

NOTE: You can use the calculator while not in Lockdown anytime, anywhere. You don’t need the internet and your device functions as normal.

Teachers - are you struggling to keep students off their phones and on task during class?

* You can create a Lockdown session and set a timer, then your students can only access the calculator on their device, meaning: no texts, no calls, no internet, no other apps!

* The classroom monitoring platform allows teachers to create classes, start/stop lockdown sessions, customize the calculator, send chats to classes, and get alerted if a student tries to make an emergency call or force his/her way out of lockdown.

* There is also a proctor version ideal for Testing Centers.
Parents - do your children waste time on their phone instead of doing homework?

* Parents can use Lockdown on their children’s devices, taking homework time to a whole new level!

Students - don’t want to spend over $100 on a scientific and graphing calculator?

* Students can simply download the calculator they need, on a device they already have, and use at school for only $4.99 per year

* During Lockdown, a student can make an emergency call if
needed, but the session administrator will still be notified

* The teacher/parent/proctor will not be able to control the
student’s device, nor have access to anything on the device
* No distance restriction

Just Lock Me Mode:
* Use to avoid distractions - set a timer and put yourself in Lockdown


* Graph as many functions as you want
* All graphs color coded
* Chart data
* Pinch to zoom
* Unlimited number of graphs
* Trace the graph to see coordinate values
* Find intersections and roots
* Find min/max points - parabolas, curves, waves
* Calculus - find derivatives at specific points
* Solve quadratic equations
* Algebra formula

* Square roots
* Logs and natural logs
* Exponential functions
* Permutations
* Combinations
* Absolute value
* Trigonometric functions
* And many more functions

* Determinate
* Transpose
* Inverse
* Identity Matrix
* Reduced Row Echelon

* Mean, Median and Mode
* Standard Deviation
* Variance
* Summation
* Correlation
* Quartiles
* Var1(x), Var2(x,y)
* User can store data in lists or directly enter data

* Present Value
* Future Value
* Payment
* Effective Rate
* Time
* Compounding Periods
* Interest Rate

Created by a teacher for teachers, parents, proctors and students

At GraphLock, our mission is to promote equity in STEM education and give all students the same opportunities to reach their full potential!

Student and Parent yearly subscriptions and all other version payments are made via your iTunes account at confirmation of purchase and subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Otherwise the account will be charged for renewal within 24-hours prior to the end of the current period.

Want to use GraphLock at your school? Contact us at: and go to for more information!

Tutorials and Demos:

If you have a question, contact us at

What's New

Version 2.0.2

Graph plotting bug fixes

Ratings and Reviews

A must download for students

Derby dogz

As a student, myself, this will really helps with my school work, homework, and also with tests. I just asked the teacher and explain the concept of this app and she was totally cool with what it is. I think everyone should get this app for themselves or for there kids. I think that everyone should get this app

Outstanding App!


Parents, students, and educations this is a MUST download!! Easy to use graphing calculator and the Lock Down is perfect for the classroom! It locks out the phone so only the calculator can be used during a test! As a mother, I want the lockdown on all my child's apps! This is app going to change education! Support this genius idea and download!

Don't spend $100 on a graphing calculator!


Great caculator and it can be used in class! It has a lockdown mode for class/tests so students can get a cheap calculator that does everything the TI does, but your teacher knows you aren't cheating while taking a test.


Graphlock, Inc
76.1 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2016 GraphLock App
In-App Purchases
  1. Premium student $4.99
  2. Premium Student $4.99
  3. Premium teacher $0.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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