$12.99 once·4.9★ (4,037)·Updated Nov 22, 2025
Verdict
GraphNCalc83 replicates a graphing calculator with touch and speed, and reviewers consistently praise its ease of use and stability over years of updates.
Best for
A student or engineer who wants a TI-83-style graphing calculator on their iPhone or iPad without dealing with a clunky physical device.
One-time purchaseTI-83 layoutGraphing
$1.99 once·4.8★ (2,627)·Updated Nov 28, 2017
Verdict
Tydlig replaces the standard calculator with an infinite canvas where you can see and edit past calculations inline, and reviewers consistently call it intuitive despite the unconventional design. It hasn't been updated in years and some users report freezes and crashes tied to older iOS versions.
Best for
Someone doing multi-step or recurring calculations who wants to see and tweak earlier steps instead of retyping them, like a freelancer sketching out pricing scenarios on an iPad.
The catch
Several reviewers report the app freezing or crashing outright, and it hasn't seen a real update in years, so bugs tied to older iOS versions may never get fixed.
One-time purchaseNo subscriptionLinked numbers
$5.99 once·4.6★ (12,032)·Updated Feb 26, 2026
Verdict
Reviewers are split on the interface: some find it easy and worth the one-time cost, others call it confusing and unlike a physical TI calculator. It works as a graphing calculator substitute but has a learning curve some never get past.
Best for
A student who needs graphing calculator functions on their phone and is willing to spend time learning a non-TI-style interface.
The catch
Several reviewers describe the UI as confusing or ugly and unlike a standard TI graphing calculator, so it may not be a smooth swap if you're used to that layout.
One-time purchaseGraphingWidely used
$5.99 once·4.7★ (6,346)·Updated Mar 12, 2026
Verdict
A well-regarded scientific calculator with a clean design, but a recent interface overhaul has left a chunk of users frustrated, with some reporting keyboard input and trig functions broken on macOS.
Best for
iPad or Mac users who want an advanced scientific/graphing calculator and don't mind relearning the interface after updates.
The catch
Several reviewers say a recent update made the interface awkward, and some report it's effectively unusable on macOS due to keyboard input problems.
One-time purchaseScientificiPhone and iPad
