Bugs
After graphing a line I then wanted to graph a parabola. It graphed the line just fine but when I cleared the y= field and entered the formula for a parabola something weird happened. The parabola appeared in the correct position but when I pressed the trace button the points weren’t in the correct position. I had to exit out of the app and open it back up and enter the formula again in order for it to plot the correct points. Otherwise it works and looks nice.
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Usage
Amazing dupe for an actual Ti-84 calculator
Very useful
Identical to the Ti-84 plus ce
inverse trig ratios dont work
i did inverse cos of 0.78… and it gave me 0.6…, the UI however is beautiful
Response from developer
Hi, please make sure that you’re in degrees mode (default is radians).
The app won’t load
The app won’t load it will always crash
Honest devs
I loved this app and used it for years, but recently they added advertisements. Obviously this was an inconvenience, but the devs came clean and said that they just needed some cash to keep the app up. For devs to be honest like this is something that everyone should respect especially with Apple taking 30% of App Store purchases. I bought premium for life for the maximum amount. Thanks Calculate84 for being a great app with honest devs! I highly recommend showing at least some support to the devs by getting premium even if you do move the slider to the lowest amount.
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Could be better
This app would be so much better if instead of trying emulate the screen readout of the physical calculator, it instead optimized for an iPhone. For example, instead of keeping division inline, allow it to reformat into a fraction-like readout. I would use another calculator app but that EE button is just too useful.
Edit: thanks for the reply, that does make it a much better user experience!
Edit: thanks for the reply, that does make it a much better user experience!
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BEST CALCULATOR APP
I don’t ever give reviews but this is just the best calculator app i’ve ever used. If you use a graphing calculator at school or work but you don’t have one at home, this does everything that the TI-84 does so it’s just great to have a seamless experience without having to spend like $100 on my own calculator
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Garbage
I have wasted too much time trying to get this calculator to work. I was trying to do Horizontal launches for physics but apparently the app doesn’t do that. I was putting the same exact equations and numbers the next morning into both calculators my phone and the actual calculator, and the phone showed 0,0 as my coordinate while the actual calculator actually graphed my answer!! so I’m trying to figure out why calculator 84 is completely different from calculator 84. This app is already wasted too much of my time, Pathetic.
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Response from developer
Hi, please let us know what equation you entered! In general though, if you can’t see the graph it’s oftentimes because it’s outside the window. Pressing Zoom -> ZoomFit should fix that. This is especially common for quadratics.
Gets most things correct
There are a few functions on this app that differ from a ti84 calculator which make it more difficult to enter calculations, as it requires you to input more variables. But it’s only a few things I’ve noticed. Also, the factorial function only sometimes works. Either it says it cannot solve the problem, or it gives me an incorrect number, so I have to use a different app for that.
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