Is the TI-89 Titanium Calculator Good? Yes the TI-89 Titanium Graphing Calculator is still one of the most capable tools I’ve tested for advanced math and engineering work. Despite being an older model, it remains reliable, accurate, and powerful.
In the morning, I first used it, and I was surprised at how fast it handled complex equations. From solving calculus problems to plotting parametric graphs, it kept up without lag. The “Amazon Renewed” version I tested looked almost new no scratches, no sluggish buttons, and all the functions worked perfectly.
It’s not flashy, but it’s a serious performer. The symbolic algebra system (CAS) helps solve integrals, derivatives, and even 3D plots something most mid-tier calculators can’t do.
For U.S. students, especially those in college-level calculus or engineering courses, it’s a dependable choice. It’s also allowed in many standardized exams (except a few that restrict CAS), which adds to its long-term value.
What I Like
- Performance that still holds up:
I ran it through complex differential equations and matrix problems, and it solved them fast and accurately. For a calculator that’s been around for years, that’s impressive. - Classic design with modern usability:
The icon-based interface feels intuitive once you get used to it. I liked that I could switch between algebraic and graphical modes quickly. - Preloaded apps and expandability:
It comes with 16 built-in applications, including stats, finance, and 3D graphing. I especially liked that I could organize folders by subjects, which helped me keep formulas and problems separated for each course. - Clear display and split-screen view:
The 2.8-inch LCD screen might not sound huge, but it’s sharp and bright. I loved using the split-screen feature seeing the equation and graph at once saves time. - Renewed reliability:
My unit came from Amazon Renewed, and I appreciated the near-new condition. It even came backed by the 90-day guarantee, which gives peace of mind for U.S. buyers.
What Could Be Better
- Not rechargeable:
It still uses four AA batteries. They last long, but a rechargeable lithium battery would make it more convenient in today’s world. - A bit bulky:
Compared to newer graphing calculators like the TI-Nspire CX II, this one feels heavier. Not a dealbreaker, but you’ll notice it in your backpack. - Interface feels dated:
It works well, but doesn’t match the visual fluidity of modern graphing tools. A small software update for smoother navigation would go a long way.
How We Tested
I tested the TI-89 Titanium for a week, focusing on its performance, accuracy, and usability:
- Equation solving: Solved calculus and algebra equations with and without CAS to check accuracy.
- Graphing: Tested 2D and 3D plots with multiple functions for clarity and speed.
- Battery performance: Used standard AA batteries to measure runtime under real use.
- Durability check: Evaluated key response, display quality, and casing condition (especially since this was a renewed model).
- Compatibility: Connected it to a PC via USB to test data transfer smooth and functional.
Everything worked as expected. It’s not flashy but incredibly dependable.
Our Recommendation
If you’re a high school senior, college student, or engineer who wants a proven calculator for serious math work, the TI-89 Titanium is still a great pick even today.
- Buy it if you need symbolic math, calculus, or physics computation power.
- Skip it if you prefer touchscreen interfaces or rechargeable devices like the TI-Nspire CX II CAS.
For U.S. users, it’s still a go-to choice especially since the renewed version brings excellent value at under $80, compared to newer models that cost twice as much.
It’s like owning a reliable pickup truck: not the newest model, but it gets the job done, rain or shine.
Why This Review Matters
I wrote this based on real use not just specs. The TI-89 Titanium Graphing Calculator may not have touchscreens or fancy animations, but it’s a workhorse. It’s built for people who care about precision, not presentation.
For students or professionals who still rely on handheld graphing tools, it’s a timeless investment that bridges traditional math practice with digital flexibility.
TI-89 Titanium Graphing Calculator Tested Review
As a calculator expert who has used graphing calculators for years from college-level calculus to circuit analysis I’ve spent countless hours testing tools that balance speed, precision, and practicality. The Texas Instruments TI-89 Titanium stands out as one of those rare models that feels built for serious problem solvers yet stays approachable for learners.
What I struggle with, however, is how steep the learning curve can be at first. The interface feels a bit “retro,” and navigating complex equations can take practice. But once you get the rhythm, it becomes your math wingman steady, powerful, and reliable.
My Experience
I’ve used the TI-89 Titanium in everything from differential equations to physics lab work. Its symbolic algebra system, also known as Computer Algebra System (CAS), makes it ideal for solving step-by-step problems that many calculators can’t even attempt. Over time, I found that it not only saves me hours of manual work but also helps visualize equations in a way that deepens understanding.
The Problem I Faced
At first, I struggled with navigating menus and remembering syntax for advanced functions. Compared to modern touchscreen calculators, the button layout can feel slow. It’s not something you can just pick up and use without glancing at the manual.
The Solution
After a few weeks, I organized my most-used functions into folders something this calculator allows through its memory management system. That small tweak changed everything. The icon-based desktop interface and Pretty Print feature started feeling intuitive once I set it up to match my workflow. Now, solving complex integrals or matrix operations feels smooth and efficient.
Alternative Options: Texas Instruments
As an expert who has used various calculator models for over 15 years, I have a lot of history with the TI-89 Titanium Graphing Calculator. It is a legendary calculator for engineering and college math. It has a powerful Computer Algebra System (CAS). While it is a true workhorse, it is wise to see what other options are out there. Newer models offer color screens, and other brands provide strong competition.
TI-Nspire CX II CAS
The TI-Nspire CX II CAS is the modern successor to the TI-89 Titanium. I found the TI-89 to be the ultimate power tool for years, but the Nspire brought it into the 21st century. Both have a CAS, but the Nspire has a color screen and a friendlier, document-based system. If you need a CAS graphing calculator but want a modern feel, the TI-Nspire CX II CAS is a fantastic choice.
| Feature | TI-89 Titanium Graphing Calculator | TI-Nspire CX II CAS |
| CAS Feature | Yes | Yes |
| Screen | Black and White LCD | Full Color Backlit |
| Design/Interface | Traditional Button Layout | Icon-Based, Touchpad |
| Python Programming | No (Limited) | Yes, Built-in |
| Power Source | AAA Batteries | Rechargeable Battery |
| My Rating | 8.5/10 | 9.5/10 |
The TI-89 Titanium is a reliable classic for complex math. However, the TI-Nspire CX II CAS offers a more visual and feature-rich experience.
TI-84 Plus CE
The TI-84 Plus CE is the calculator I see most often in high school classrooms. When I first tried it, the simple, direct interface was a welcome relief from the complex menus of the CAS models.
The key difference from the TI-89 Titanium Graphing Calculator is that the TI-84 does not have a CAS. This makes it allowed on more standardized tests, like the ACT. If test compatibility is your main concern, this is a strong choice.
| Feature | TI-89 Titanium Graphing Calculator | TI-84 Plus CE |
| CAS Feature | Yes | No |
| Exam Eligibility | Often Restricted | Widely Approved (ACT/SAT) |
| Use Case | Advanced College/Engineering | Standard High School |
| “Pretty Print” | Yes | Yes (MathPrint) |
| Memory | Folder Management | Basic List/Program Storage |
| My Rating | 8.5/10 | 9/10 |
If you need a programmable graphing calculator for symbolic math, stick with the TI-89 Titanium. For simplicity and testing security, the TI-84 is better.
HP Prime G2
The HP Prime G2 is a strong competitor that offers a fresh perspective outside of the Texas Instruments family. When I first used the HP Prime, its sleek look and responsive touchscreen were very impressive.
Like the TI-89 Titanium, the HP Prime also has a CAS. It offers a powerful, modern experience for math and engineering. This calculator is a fantastic option if you are open to trying a different brand for your advanced needs.
| Feature | TI-89 Titanium Graphing Calculator | HP Prime G2 |
| CAS Feature | Yes | Yes |
| Interface | Button/Menu Driven | Touchscreen and Keypad |
| Speed | Moderate | Very Fast Processor |
| Power Source | AAA Batteries | Rechargeable Battery |
| Geometry | Dedicated App | Dynamic Geometry App |
| My Rating | 8.5/10 | 9.5/10 |
The TI-89 Titanium Graphing Calculator is dependable, but the HP Prime G2 offers high speed and a modern, color touchscreen. It is a true rival for power users.
FAQs
No, the original TI-84 Plus graphing calculator was released in 2004. The TI-89 Titanium model was also released in 2004. Both calculators were introduced around the same time.
To graph on a TI-89 Titanium, press the Diamond key, then the F1 key to enter the Y= Editor. Type your function, then press Diamond and F3 to view the graph.
The TI-89 Titanium is more powerful because it has a CAS (Computer Algebra System). This lets it solve equations symbolically. The TI-84 is simpler, easier to use, and is allowed on more standardized tests like the ACT.
Yes, many advanced graphing calculators, including the TI-89 Titanium and the TI-Nspire CX II, can perform 3D graphing. This feature lets you visualize functions in three dimensions.
The TI-89 Titanium is not allowed on the SAT. This is due to its CAS (Computer Algebra System) functionality and its keyboard design. Check the College Board’s most recent policy before testing.
The TI-89 Titanium model was released by Texas Instruments in 2004. This makes the calculator design over two decades old, though it is still popular today.
The TI-89 Titanium is still worth buying if you need a powerful CAS calculator for college or engineering. Since it’s older, you can often find it at a great price, but check the exam rules first.
The TI-89 Titanium is used for advanced math and science, especially Calculus, Linear Algebra, and Engineering. Its CAS feature helps solve complex equations and perform symbolic math.
Many consider the TI-Nspire CX II CAS to be the best modern TI graphing calculator. It has a color screen, a fast processor, and a powerful CAS, but it is often banned from standardized tests.
Yes, the TI-89 Titanium can do 3D graphing using its built-in functions. This is a key feature that helps students visualize complex multivariable calculus problems.
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