| Amazing Capabilities by Mac-Lover |  |
"This app is way more than a graphing calculator. Capabilities like solving differential equations, preforming matrix factorizations and many more place it in a league of its own for hand held computation. The interface is simple and the extensive catalog (now with examples!) makes it easy to quickly learn how to execute any operation. As an undergraduate math and physics student, this app has completely replaced my TI and drastically reduced the time I spend on MATLAB and Mathematica. I would recommend SpaceTime to anyone!"
| So wonderful I am crying by BossBossBoss | |
"Spacetime is really, truly great. Not only is it by far the most impressive use of the iphone OS and hardware that I've seen, but it is also an elegant, finely crafted tool. My greatest joy in using this software is found in how self contained it is. A description of each function can be found in the catelog tab, making for wonderfully accessible documentation. Thank you, Spacetime."
| Creatively genius by howwaya | |
"This app offers so much, and everyone can learn from it. Amazing 3D grapics, intuitively designed with the end user in mind. It is apps such as SpaceTime, that show us why the App Store for iPhone/iPod touch/iPad is by far the best for mobile devices."
| Replace your old graphing calculator with your iPhone! by AppShouter |
"This app really goes beyond your typical graphing calculator as well. How? By allowing you to interact with the graphs that you generate by touching them! I could go on and on about this app, but If you’re still reading this review, let’s just say that you’re probably not going to find a better graphing calculator than this in the App Store."
| Great, great, great!!! by Eduardo C Letort | |
"This application deserves an Oscar (and at least two pullitzers). The iPad release is awesome."
| Amazing by rationalresponse | |
"This application is simply amazing. I continue to be stunned by the speed and accuracy in which it solves/plots/does just about anything you could possibly need to do in math. I prefer it to computer math applications because you simply cannot beat the touch interface. This app has changed the way that I do math every day, and I highly recommend it to anyone who does math on a daily basis."
| Fantastic... It's a TI-92 on steroids by Dan Frame | |
"I've been waiting for a program like this a long time on my iPhone or iPad, and somehow never found SpaceTime until now. This is a phenomenal engineering application for the student or professional. It does it all... Solving equations, integrating, calculating derivatives, and graphing. I had a TI-92 calculator back in my college days that I used for years and dearly loved and this app blows it out of the water. The UI might not be beautiful, but it's extremely functional and intuitive to use. They include a really quick tutorial that gets you up and running quickly. This is the example app for the potential of a device like the iPhone or iPad. Superb!"
| Dump your graphing calculator! by Syldaril | |
"This is truly an amazing piece of software for the iPhone that could potentially render all the graphing calculators out-there obsolete! I was very impressed with all the graphing features (2D, 3D, 4D, etc) and the powerful CAS loaded with preprogrammed funtions. SpaceTime solves and displays complex expressions in a fashion that reminds me of my TI 92's 'pretty print' mode. I highly recommend this application to every college student and math enthusiast!"
| Wow! by aurorae_borealis | |
"I am so lucky to find this application! I will never use TI-89 again! And the price is anbelievable! And you can do scripts! TI-89 costs over 100 dollars. You can use this application instead! Too bad our professor doesn't let us use phones on test. I will try to convince him by showing this application. SpaceTime is well worth the money."
| Simply the best calc app for the iphone by ilachina | |
"I used to own a Pocket PC (before it was stolen and I moved to an iPhone). I regretted nothing about moving to an iPhone except having to give up my one truly indispensible application on the PocketPC, namely SpaceTime. I lamented its absence from the iPhone ever since. Now its here and available! It is a programming tour-de-force, and really does provide a substantial subset of the functionality of desktop powerhouses like Mathematica and Maple. To compare it to a "calculator" is somewhat like comparing a racing car to a road bike. Vastly different leagues. It would arguably be worth the "price of admission" if all it offered was its graphing capabilities and nothing else. That it offers everything a conventional scientific calculator does plus a full suite of symbolic algebra functionality is a rich frosting on the cake. I applaud the programming team for developing an extraordinary little program, and for making it available to a broader community. It matches or exceeeds an HP-50g or Ti-89 for pure functionality, yet is offered for a fraction of the cost. If you are an engineer or scientist, or anyone in search of a full function scientific calculator/plotter/symbolic manipulator, you've found your iPhone dream app. "
| Unsurpassed by UERD | |
"This is by far the best calculator (if you can call it that) app on the iTunes app store (as of the beginning of 2009)- it has a featureset comparable to that of an advanced graphing calculator, like a TI-89, but with the benefit of a touch-screen interface and full-color graphics (which are especially nice for 3D plotting). SpaceTime also performs both numeric and symbolic algebra and calculus (including some advanced functions) and supports scripting. If you've used software like Maple or Mathematica, SpaceTime works in a similar function- not quite as feature-rich, but far more than you might expect from a handheld device."
