Verdict
Throws out the keypad entirely. Numbers sit on an endless canvas, stay connected to each other, and update everything downstream when you change one.
Best for
Anyone doing the kind of arithmetic where you keep changing an input and want to watch the answer move.
Dealbreaker
You have to unlearn a calculator to use it, and a crash reviewers have been reporting since iOS 11 still turns up in recent reviews.
The facts.
Pulled from the App Store, not written by hand.
Price
$1.99 once
In-app purchases
Unknown
Ads
Unknown
Platforms
iPhone, iPad
Rating
4.8★ (2,627)
Version
1.6
Last updated
Nov 28, 2017
Released
Dec 5, 2013
Attributes
Native appOne-time purchaseNo subscription
Category
Utilities, Productivity
What reviews consistently say.
Themes grouped from 200 App Store reviews. Source feed ›
Praised for
Ease of use and design23 reviews
Subscription pricing and paywalls3 reviews
Import and export3 reviews
Sync and multi-device3 reviews
Complained about
Crashes and stability3 reviews
Where this comes from
23 of 200 recent reviews raised: Ease of use and design (positive)App Store reviews ›
3 of 200 recent reviews raised: Subscription pricing and paywalls (positive)App Store reviews ›
3 of 200 recent reviews raised: Import and export (positive)App Store reviews ›
3 of 200 recent reviews raised: Crashes and stability (negative)App Store reviews ›
Replaces the fixed keypad with an editable canvas where results stay linked to their inputsApp Store listing ›
Where we recommend it
Calculator apps you buy once ›Scientific and graphing calculators, bought once.
Alternatives with the same rule.
Every app here is a single purchase. None of them can start charging you monthly for what you already bought. Also with a catch.
$12.99 once · 4.9★ (4,037) · Updated Nov 22, 2025
Verdict. The best-liked calculator on the App Store and it earns it. A TI-83 layout you already know, running far faster than the plastic one ever did.
Best for. A student or engineer who thinks in TI keystrokes and wants them without the hardware.
Dealbreaker. It is a graphing calculator and nothing else — no tape, no unit conversion, none of the everyday conveniences — and no exam hall will let you bring a phone, which is where most people actually need a TI-83.
$5.99 once · 4.6★ (12,029) · Updated Feb 26, 2026
Verdict. The one most people end up owning. Broad, capable, and priced low enough that it is the default recommendation in a lot of classrooms.
Best for. Someone who needs a graphing calculator today and does not want to research it.
Dealbreaker. It looks its age and people say so — the interface draws as many complaints as compliments, and several reviewers say it took real effort before it clicked.
$5.99 once · 4.7★ (6,344) · Updated Mar 12, 2026
Verdict. The scientific counterpart to the one above, from the same developer, and the better buy if you want a calculator rather than a plotter.
Best for. Someone who wants a fuller scientific keypad than the built-in app offers.
Dealbreaker. The Mac version does not take keyboard input, which makes it close to unusable there, and reviewers report updates breaking things that previously worked.