• Category: Education
  • Release Date:
  • Current Version: 1.7.3
  • Adult Rating: 4+
  • Developer: Century Light LLC
  • Compatibility: Android
  • Links: Google Play Store
6,125 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 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. HOW TO SEND FEEDBACK 1. Press the red feedback button.

Calculate84 app screenshots

Calculate84 app reviews

  • G 5/5

    By ztgnkifd
    I love franglais
  • Please update the app 3/5

    By gsotocornejo
    On the latest release of iOS for iPhone your app crashes when trying a 2-SampleTInt confidence interval function. Anytime I input my values the app crashes when I “scroll” down to the “Calculate” button. I tried this with lots of different data with the same results for T or Z 2 sample interval functions. I am a lifetime subscriber and paying customer and really rely on this app for school.
  • If you’re a student and study on your phone this is a must 5/5

    By shanbabah
    Im always studying on the go and having a good calculator on me 24/7 has made it so much better
  • Love it 5/5

    By kweeen of the cats
    Lowkey been using this app since algebra 1 saved me through many late night homework assiments.
  • Ti 84 Calculator 5/5

    By jendalfthegrey
    Great calculator so so happy I found this app
  • Good simulator 5/5

    By Error367091:UserNotFound
    Adapts to generic graphing calculator accurately and with adjustments to work more conveniently for touch screen. Pretty much all content present in the official old fashioned calculators is here, with good additions added on top. Works fairly well on my 64gb base iPhone 11 and 256gb iPad 9
  • This is so helpful! 5/5

    By HazelHarpPrice
    This calculator is great to have on your phone. It never glitches. I use it all the time for my Algebra class!
  • Pretty good 4/5

    By PAIN_TM
    Some times the answer is a bit off compared to a actual TI 84, and zoom stat doesn’t work. It doesn’t actually graph any points.
  • lit 5/5

    By BoxedMathlikea🐟
  • Love it but… 5/5

    By MacroSiggitySoft
    I love this app but does it work with iOS 16 because I updated my phone and now cant open it.
  • I love it 5/5

    By Brrrreeennaann
    Thank you for making this wonderful app
  • So sweet 5/5

    By reef716
    Ive been using this through my math classes for years to avoid spending $100+ on a calculator and its so amazing. recently they updated the app and wrote an honest message about how they were finally going broke, but they knew people couldnt always afford it and they wanted to keep things accessible, so they clarified they would be adding ads, and honestly thats all I ask of apps. Honesty and respect. I love that they just talked to their users like human beings and still care and arent making people pay for it. I will watch a million ads for you guys. thank you
  • Best calculator app by far 5/5

    By charlottekko
    I love my TI-84 but I forget it all the time when I need to use it or it’s out of battery when I need it. However, I’m NEVER without my phone and this app is the best calculator app because it’s just a simulation of the same calculator that I love. It’s so intuitive if you own a TI-84 and are used to it and it functions just like it. OH AND IT’S FREE. So worth it saves me countless times in lectures or recitations when I need to whip out some quick maths.
  • The best calculator 5/5

    By Roth64828
    I have this calculator for 4 years and ounce I heard they needed to start putting adds I gladly paid the $7 for no ads. This is the best app calculator and instead of paying $150 for the actual calculator it’s $7 and in your pocket all the time. This has saved me carrying the bulky calculator. I have yet to run in a problem and I use this app more than any other app on my phone. Overall perfect execution from the devs.
  • Awesome! 5/5

    By leonardo huerta
    Works great, perfect to use for college algebra!!✅
  • The Best Calculator for iPhone! 5/5

    By BBRAT97
    This app truly is the best! Especially for STEM people!
  • definitely get 5/5

    By Rachghgh
    What a great fricken app. i’m in college and as u guys know that means i’m broke so this app having everything i need for stats was literally a life saver. didn’t have to buy anything to use it and it literally has all the features u need for upper class levels. download it
  • Best calculator! 5/5

    By foolish_frank
    This has to be the best calculator and the best part is that it’s convenient and free to use!
  • Even simple addition was wrong. Dissatisfied. 1/5

    By shekdjcjndhfvj
    Even simple addition was wrong. Dissatisfied.
  • Matrix issues 3/5

    By LegendaryRadiance
    The matrix system doesn’t work properly - doesn’t save some of the numbers I log while typing, giving me some weird answers
  • a real graphing calculator!! 5/5

    By BubsBuhZero
    mostly works as a regular ti-84 would.
  • My school 5/5

    By frind of that guy
    I go to Crockett middle and honestly this is the bast app for 6 to college
  • Nice 5/5

    By Zillaj.r
    Very good
  • good for chem 5/5

    By GachaLifeFanDevanandaNair
    perfect for high school chemistry!

    By Bunker boy 🍤
    Guys I literally use this app everyday for my homework. We are not able to take the school calculators home so this app comes in handy all the time. With out this app I would be no where.I would be lost and wouldn’t know where to go😿
  • Owo 5/5

    By galacticskyz
    I love it so much I can finally do homework yess🤩🤩🤩🤩🤩🥳🥳🤩🤩🤩🤩🤩🤩🤩🤩🥳🤩🥳🤩🥳🤩🥳🤩🥸🥸🤩🥳🥸🥳🥳🤩🥸
  • You all are doing a great job! 5/5

    By luna1324532748
    I’ve been using this app for years now, and i really appreciate all the work you’ve done. I’m happy to pay the money to become a member and remove ads, because you are doing important work for access to a usually very expensive calculator. I genuinely appreciate how easy it is to use, and it’s by far the best calculator app i’ve ever used. superior to any other free apps u could get, even with ads! Thank you to everyone at your team! - a very grateful student
  • Plz don’t go away 5/5

    By jacyboi5
    I really like this because sometimes I need to do algebra homework and I don’t have this kind of calculator
  • So Awesome!! 5/5

    By Mackenzler
    I love this calculator so much, most of my teachers even let me use it in class, i always just borrow a real calculator when it comes to the test because yk, phones are cheating or whatever. But still 5/5 stars, love this app!!!!

    By Aditya8008
    I mean it just works the way you want it to. It’s so good. One thing I would really love is to copy and paste previous answer. I’m having to store values and stuff but other than that it’s A++
  • Great when you forget 5/5

    By emo1981
    This does pretty much everything a regular TI-84 does. I use it as a teacher!
  • I use this app to work, not watch ads 1/5

    By Trina000
    I used to use this app all the time for general stuff, like school and some work at home, but now I can’t use it without getting an ad shoved down my throat every minute. Thanks for ruining this app, I’ll be uninstalling.
  • New idea 5/5

    By mgkmekrodmsnfnr
    Add a delete button so I don’t have to keep typing out the same problem
  • Great Help 5/5

    By Shrey's sexy revews
    Useful in a pinch when I can’t find my calculator and It feels just like it. In fact I sometimes prefer using this over my Ti-84 CE.
  • saved me so many headaches 4/5

    By idfkausername
    the apple calculator is useful but this one has EVERYTHING, its perfect i wish you could delete single numbers instead of having to rewrite the whole expression, but it’s worth it
  • This app is perfect for my geometry class 5/5

    By YassenisBlueface
    Zero flaws
  • Sketchy ads 2/5

    By wild goose96
    The app used to be really good before they added the random pop up ads that look like a cesspool of viruses. There’s also no warning and the ads are as deceptive as possible to try to trick you to click them. Wouldn’t recommend to younger kids.
  • Awesome! Saved me So much Money 5/5

    By Tïttïe milkies
    This app is awesome!! It’s just like a Ti-84 but I didn’t have to go out and buy one I can just use this for free! I just figured out how to do the echelon method on it so I’m very happy! :)
  • Simple random solutions doesn’t work 3/5

    By WilliamMcPherson91$:&2
    When I type my seed and then “sto” I click on “1:rand” and it doesn’t let me continue from there when I press enter.
  • Terrible 1/5

    By realmufuka
    The answers change when doing Pythagorea theorem (when input the same problem again)
  • This is a great companion to the TI-84 5/5

    By averymbrook
    What a wonderful app. Easy to access and a great way to learn the functions of the TI-84 for homework and for training for the ACT or SAT.
  • Advertising. 1/5

    By волынский партизан
    In the last update, the author "forgot" to indicate that he introduced advertising.
  • Great app! 5/5

    By Joeweeuyy
    Super great app that has everything graphing calculators have. Thanks!
  • Missing a few things 1/5

    By fbrp1
    Update: Think you gave many (me, at least) the impression that I would never see ads if I got the app before you monetized it. Anyhoo, no more bug reports, also will be deleting. +1 on mathprof2’s 25APR comments. Also, it fails to graphically determine a maximum for the Box With Lid example from the TI-84 manual. Please fix those items & I’ll also change this to 5-stars. Still, overall, well done. Update: Appears you’ve fixed the graphical max bug, nice.
  • HUGE HELP 5/5

    By joemama369
    completely worth the price this is amazing for graphing functions
  • literally a ti-84 5/5

    By Rat_Nest04
    if you need a ti84 for school, work or anything else, you don’t need to spend $100 for a calculator. (if you have a lenient cell phone policy) I have yet to find something that the ti84 does that this app can’t. I highly recommend for high school/college students.
  • Hi 5/5

    By its_olli3
    It's really good for school
  • Ads...why, oh why... 1/5

    Hey, thanks for finally adding ads. It really adds to the experience. Not. Would've preferred you halt development if you're broke instead of forcing me to see ads if I want to continue using the app. Honestly ruins the entire experience for me. And no, I'm not willing to all of a sudden pay money for something I already had legitimate free access to, which was an ad free experience in the app. Truly a shame.
  • Calculator App Review 5/5

    By loretta sunshine
    Super easy to use - way cheaper than purchasing an actual graphing calculator. This app saved me for an accounting course!