This app was mentioned in 14 comments, with an average of 1.36 upvotes
Well in that case I would recommend Desmos or Wolfram Alpha.
I just use the desmos graphing calculator app. Great dynamic equations as you type and the benefit of graphs, sliders, and tabes.
https://play.google.com/store/apps/details?id=com.desmos.calculator
But if you want one without the graphs, they've made an app for just what you described:
https://play.google.com/store/apps/details?id=com.desmos.scientific
Which functions the same without the graphs
Definitely don't tell anyone about Desmos Graphic Calculator or it's scientific version
Not sure how well it'll work for limits and stuff, but Desmos is a fabulous resource! It's saved my ass so many times this year in precalc.
Its been late, I was lurking on this thread. But I should add some of my favorite science/study apps here. I am a nerd, or was one. These are great for high school, college, and engineering students
If you are looking for graphing calculators with additional niche features, check these 3 out:
Other Science/study apps I like:
Edit: Added Links.
https://play.google.com/store/apps/details?id=com.desmos.calculator
Try this, bud. Hope it works out for you. :)
Hard to find one without a paywall but this should work.
That's a lazy solution. Android allows for locking down of devices. You can get cheap Android tablets that are 1,000 times more powerful than TI calculators, for around $100 each. Schools should just do the following:
Buy a tablet like this (can easily be gotten for under $100 in bulk) - https://www.amazon.com/Samsung-Galaxy-Lite-7-Inch-Dark/dp/B00HWMPSL0/
Install Desmos - https://play.google.com/store/apps/details?id=com.desmos.calculator&hl=en
Manage the Android tablets using Google Apps for Education - https://support.google.com/edu/android/answer/3429621?hl=en
Now, instead of having an extremely over-priced, single-purpose calculating device, you have an extremely general computing device that can be used for things like science, social studies, reading, programming, artistic creation, creative play, and educational gaming, along with a more robust math tool.
Or just keep forcing students to buy over-priced TI calculators I suppose...