• Category: Education
  • Release Date:
  • Current Version: 1.3.7
  • Adult Rating: 4+
  • Developer: Century Light LLC
  • Compatibility: Android
649 Ratings
$ 0

Calculate84 App

A MODERN GRAPHING CALCULATOR ON THE iPHONE 1. Fast, Interactive Touch-Screen Graphing 2. Everything is where you’d expect it to be 3. Scrollable Windows (no more spamming the up arrow keys) 4. Intelligent Error Messages 5. Convenient 6. IT’S FREE (for now). WHY MAKE ANOTHER GRAPHING CALCULATOR APP? 1. We (the creators), once relied on graphing calculators, and after installing countless, similar apps, we couldn’t find anything useable. Hence, we made our own.
 2. Before launching on the App Store, we personally worked with a limited, yet sizable, number of students to continuously improve the app. WILL IT REMAIN FREE? For those who use it now, it will always be free. However, eventually it will be monetized to ensure it’s sustainable for the developers. Regardless, we get it, not everyone can just buy things whenever they want. Hence why, even after release, we’ll constantly be trying to find ways to make it available to everyone. HOW TO SEND FEEDBACK 1. Press the red feedback button.

Calculate84 app screenshots

Calculate84 app reviews

  • A savior 5/5

    By Zephyrzz
    This app was created by an angel. Why should I pay 100 dollars for a calculator when I can use an app created by a literal legend? Thank you creators, thank you
  • Awful 1/5

    By angrysnapchatter69
    Works terrible and important do what they’re supposed to Quits a lot too
  • Great app 4/5

    By Davrin0114
    It got me through high school math. Only issue is matrix math doesn’t work
  • Box and whisker plot 3/5

    By uhhrrddjgf
    There seems to be a problem when creating a box and whisker plot. You can put all the data into the stat and use 2nd y= to select box plot. However, when you select graph you do not see the actual box and whisker represented on the coordinate plane.
  • Great! 4/5

    By SaturnSock
    I had to use this for online school and it fits my teachers exactly1
  • Glitch 3/5

    By trying to learn🙏🙏
    When your trying to convert decimal to fraction it doesn't do anything please fix
  • They know where they’re going 5/5

    By WTR50
    I love the TI environment. I that is what you are after but on your phone instead this is a great app to have. The app itself is not yet full functional but they are constantly working to make it better. It loads quickly and operates smoothly. Great job guys. Can’t what for you to be able to program the calculator like the real thing!
  • Useful 5/5

    By Madeline Milam
    This app is so easy to use and it’s so helpful! It helps me with my school work and mainly covers everything. Make sure you get this it is awesome! #notsponsored lol😂
  • Hostile Design - Requires Email 3/5

    By Qasireu
    Requires a sign in to Apple or Google if you don’t want to get a message on startup. I don’t know why a calculator app needs my email. Otherwise, works and feels 95% like a TI-84, except for the lack of the ON button, which makes it MUCH easier to switch from graphing to calculating.
  • Amazing 5/5

    By Joeybigtoey
    Love it!! Please do not make it so that we have to pay for it in the future :)
  • i feel like i should pay for this quality 5/5

    By thiccanimethighs
    i was expecting to have only the base calculator with some extra features locked but wow i am pleasantly surprised with the high quality of this, all without spending a penny. if there's a way to donate somehow i would
  • Greatest app ever 5/5

    By Sacapoopie
    I love this app. It’s so much better than an actual calculator. I don’t get how something like this is free. 10/10 recommend!
  • Good app but.. 2/5

    By wtfdoode
    Missing a lot of info, can be updated. I can’t even use it to find my confidence intervals. Wish I can get my money back. Very disappointing
  • Basic functions do not yield the correct results 1/5

    By Cuber man
    Specifically the nth root function. For instance the 3rd root of -8 should return -2. However it returns a complex number. Pathetic.
  • Fantastic 5/5

    By Sw1ft3r
    I’ve never seen a TI84 recreated and implemented as smoothly for the price point of being free (for now). It’s been an absolute joy to work with so far and works exactly like how you would expect a TI84 to function but on your phone! I’ve used other apps that have individually either been for graphing or for being a non graphing calculator, but to finally see a free app combine the two worlds is a joy to see.
  • Great Calculator, But Needs More Features 4/5

    By Agzhcmgjdhnsb
    I got this app because I won’t have access to my calculator for a couple days, and I needed to do some standard deviation stuff for school.... turns out the functions I needed were not there :( That being said, I played around with it, and this is an amazing calculator alternative!! The pinch-and-zoom on the graphs is very nice. I’m leaving this review in the hopes that the devs add stuff like the Distribution
  • good but missing a lot of important stuff. 3/5

    By The hobbit eman
    so overall this is a pretty good graphing calculator emulator for your phone. I like how it vibrates when you hit buttons on it to let you know that you actually hit the button. so far the answers it gives all seem to be correct also. unfortunately, it is missing a lot of important things. It can do linear regressions, but no other types of regressions. I assume the developer is working on adding those but they should really be near the top of the list. they are part of basic pre-calc so they should be added asap. I will say that as of right now it is definitely the best one available for free because the other ones lock literally everything behind paywalls but still let you download it for free which just seems like a scummy way of boosting downloads. if you add in regressions, i’ll bring my rating up, but it wont be 5 stars until all commands are available.
  • Can only do the job halfway 2/5

    By hello mdnsjdnx
    When you are trying to do an actual problem it’s almost impossible to compete because so many of the functions don’t even work.
  • Regression 4/5

    By Kypreakat
    I love this calculator but it has a major flaw. For linear regression when the correlation coefficient r is supposed to be a negative value it gives a positive value every time. This would mean that the answers come out wrong for the kids on a regression assignment.
  • Works well, but could use some improvements 4/5

    By Math Teacher 0521
    I am a mathematics educator and believe this is a great resource for my classes. However, when teaching my students about sequences and series, parametric function, polar functions, this calculator does not allow the ”mode” to switch. It says it's in the specified mode but doesn't switch. However, this is still an excellent resource for students who need it for other concepts in mathematics.
  • One of the greatest apps 5/5

    By jenn10bravo
    This is by far my favorite calculated app and it helps so much as a college student
  • You need this for math 5/5

    By the greatest goat fuudhe
    This app is a life saver
  • Really? 1/5

    By 🏀🏀😝
    You can’t even use have the features on the app. If you are wondering if this is a good calculator replacement. IT IS NOT. To the developers: If u can unlock all the features to the app please do. It would help students to be able to use the app instead of you guys trying to collect a profit on desperate students who are struggling with their math classes at home!!!
  • This is amazing! 5/5

    By matmik1
    Exactly like the TI-84! Thanks 😄
  • Bad 1/5

    By reidwilfley
    I just needed one thing but their was so much Var-stats that were unavailable
  • This app is amazing 5/5

    By hc_21
    This is the only app that my teacher lets us use. It’s so good and makes sense/is easy to use. 100% recommend this app
  • Terrible App 1/5

    By Ella Fiii
    Can’t even do simple functions like one-variable statistics with a frequency list. Extremely frustrating to use this app for anything other than basic math as all the additional features are either missing or don’t work, even if they’re offered. DO NOT use this for statistics, it is not even close to being capable of doing half the functions you’ll need.
  • Great and easy app 5/5

    By Pianoplaying
    This app is really good. It’s smooth, fast, and reliable. I use this app for algebra, and during the quarantine, I need a calculator to use, and this calculator app was the best one I found.
  • Nice 4/5

    By Sunny Blaze
    This is convenient when I don’t have my TI-84 Plus CE handy. However, it does have its limitations. I am unable to perform, for example, a chi-square test on here.
  • Finally a decent 84 4/5

    By Panfil08
    The only reason I don't give it 5 stars is because the Catalog option does not seem to work 🤔 other than that, it is excellent!
  • I got my math questions wrong 1/5

    By Jkrool
    I am home during quarantine without a ti-84 calculator I need it to be set in degrees so I set it in degrees. I come to find out when you click clear it resets it so now here I am redoing my test because it reset back to radian without me knowing
  • i’m blown away 5/5

    By spacexgrl
    i haven’t even used it for that long and i’m in love
  • Calculator is great 5/5

    By j.sticks11
    Everything I need!!! My calculator broke and this app is exactly what is on my calculator!
  • GREAT calculator for college students 5/5

    By yancaalol17
    this is a great app calculator for statistics I myself didn’t want to spend A lot of money buying a calculator so when i came across this app i was so happy it actually did all the things i needed it to do!
  • Love it 5/5

    By C.Tran brockhampton
    It’s really cool apps and exactly like the calculus at school
  • The calculator 5/5

    By jazmyn rebteria
    It is very good with school work
  • Stats stats stats 4/5

    By Marc Y. Liu
    Please more stats features (tests, etc) I’d pay big bucks
  • Mostly good 4/5

    By jimcallister
    Everything work except there is a bug where the numbers disappear on the calculator screen randomly
  • Awesome 5/5

    By thagods16
    I love it is a great calculator without having to pay for it.
  • Nothing working 1/5

    By sbsvzijw. xhzma
    Bad design , did not work
  • app is really good 5/5

    By poopybutt1026
    app is really easy to use and works really well
  • Not functional 1/5

    By Gold Foxy
    I can’t use important features like the catalog making it impossible to do my work form home because of the virus.
  • Free and easy 5/5

    By Sawlteeguy
    The other apps for calculating stuff like this one aren’t as good or they cost money
  • Easy to use ... doesn’t have it all 4/5

    By Alliakat
    I really wish the Stat tests and probability distributions were functional in the app.
  • Nice app 5/5

    By littleshawn 221
    It a good app and it’s free and are teacher wanted us to buy another app for $6.00 really
  • I have never written a review yet. 5/5

    By review man Ozzie
    This is one of the best ti84 calculator apps On the apple store
  • Yes 5/5

    By (not taken nickname)
  • best phone calculator 4/5

    By rapidkillerx
    as good as a calculator on a phone could possibly be. A real calculator has a little more tactile feedback, but that’s not something you can replicate on a phone (though the dev gave it a shot with vibration which is nice)
  • Perfect 5/5

    By Lollipop :P
    I’m a Calculus student and I’ve been searching for months for a calculator app with integrals and this is the only one that’s works!!

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