Calc89 vs TI-89 Titanium: App vs Handheld

Feature for feature

Calc89 app, TI-89 Titanium handheld and TI-89 emulator apps compared
Feature	Calc89	TI-89 Titanium handheld	TI-89 emulator apps
Price	Free to download, Pro features as an in-app purchase	Around 150 USD new	Varies by app
Exact symbolic CAS	Yes	Yes	Yes
TI-89 Titanium command names and keys	Yes	Yes	Yes
Display	High-resolution color, textbook-style math, eight themes	160 × 100 pixel monochrome LCD	Emulated 160 × 100 screen
CAS and graphing speed	Native speed on your phone	16 MHz processor	Emulated, depends on the device
Camera problem scanner	Yes	No	No
AI keystroke tutor	Yes, with tappable key chips	No	No
Needs a ROM image	No	Built in	Usually
Works offline	Yes	Yes	Yes
Power	Charges with your phone	Four AAA batteries, lasts for weeks	Charges with your phone
Runs on	iPhone, iPad, Mac, Android	Handheld	Varies
AP Calculus, AP Physics exams	Not permitted (phone app)	Permitted	Not permitted (phone app)
SAT (since August 2025), ACT	Not permitted	Not permitted (CAS calculator)	Not permitted
Homework and college courses	Fully covered	Fully covered	Fully covered

Exam rules as of October 2026: phone and tablet apps are not permitted on standardized exams. The SAT (since August 2025, see the College Board calculator policy) and the ACT prohibit CAS calculators, including the TI-89 Titanium. The AP Calculus and AP Physics exams still permit the physical TI-89 Titanium. Always check the current calculator policy of your exam.

So which one should you get?

You take AP Calculus

Use the TI-89 Titanium on the exam, because the AP Calculus exams permit the handheld and no phone app. Practice with Calc89 at home: the keys are the same, and the tutor shows the sequence for each problem, so the handheld feels familiar on test day.

You study Calculus I to III, Differential Equations, Linear Algebra or engineering

Calc89 is usually enough. deSolve(, rref(, eigVl( and ∫( give the same exact answers, the display is easier to read and the phone is always with you. Buy a handheld only if a course or exam requires one.

You teach

Mirror an iPad or a Mac to the projector and show the exact keystrokes in color, large enough for the back row. Students with a TI-89 Titanium follow along on the same keys, and students without one can use Calc89 for homework.

Where the handheld still wins

AP exams. On the AP Calculus and AP Physics exams, the TI-89 Titanium is allowed and a phone is not. On the SAT and the ACT, neither is: both prohibit CAS calculators.
Battery life. Four AAA batteries last for weeks of class use, and the handheld never needs a charger before a test.
No distractions. A calculator gets no messages, and teachers can allow it in class without a second thought.
Physical keys. If you type long sequences fast without looking, real keys still feel quicker.

Where Calc89 wins: it is always with you, the color display shows math the way your textbook prints it, the CAS runs at the speed of your phone, a camera scanner reads printed or handwritten problems, and the AI tutor shows the key sequence step by step. Emulator apps reproduce the old screen and usually need a ROM image; Calc89 needs neither.

Familiar in the first minute

Calc89 uses the TI-89 Titanium command names, argument order and keys. If you know one, you know the other:

2nd8→ d(
Derivative, the same as on the handheld.
2nd7→ ∫(
Integral, indefinite or with bounds.
F21→ solve(
F2 Algebra, item 1.
F33→ limit(
F3 Calc, item 3.
◆ENTER→ ≈
Decimal result instead of exact.

Read the keypad guide for the 2nd, ◆ and alpha layers, or start with the AP Calculus keystrokes. Every command has its own page in the commands reference.

FAQ

Do I still need a TI-89 Titanium if I use Calc89?

Only if you take an exam that requires a handheld. For homework, college coursework and studying, Calc89 covers the same CAS work. Phone apps are not permitted on standardized exams. As of October 2026, the AP Calculus and AP Physics exams permit the physical TI-89 Titanium, while the SAT and the ACT prohibit CAS calculators.

Can I use Calc89 on the SAT, ACT or an AP exam?

No. Phone and tablet apps are not permitted on standardized exams. As of October 2026, the SAT (since August 2025) and the ACT prohibit CAS calculators, including the TI-89 Titanium. The AP Calculus and AP Physics exams still permit the physical TI-89 Titanium handheld.

Is Calc89 a TI-89 emulator? Do I need a ROM?

No. Calc89 is not an emulator and needs no ROM image. Its computer algebra system is built in, and it uses the TI-89 Titanium command names and keys, so what you learn in one carries over to the other.

Is Calc89 made by Texas Instruments?

No. Calc89 is an independent app intended for use with TI-89 Titanium. It is not affiliated with or endorsed by Texas Instruments. TI-89 Titanium is a trademark of Texas Instruments.

What does Calc89 cost?

Calc89 is free to download, with Pro features as an in-app purchase. The current prices are shown in the app before you buy. A new TI-89 Titanium handheld costs around 150 USD.

Calc89 is an independent app and is not affiliated with or endorsed by Texas Instruments. TI-89 Titanium is a trademark of Texas Instruments. SAT and AP are trademarks of the College Board; ACT is a trademark of ACT, Inc.