Nabla 1.2 is our biggest update yet. • Every lesson is now taught step by step by Del, in 3D • 17 new topics, including L'Hôpital's rule, eigenvectors, Lagrange multipliers, Green's and divergence theorems, normal probabilities, the central limit theorem, p-values and Laplace transforms • Exam Mode builds a fresh paper every time, from what you have studied • Set your exam date: a countdown and a plan paced to it • Mixed review across topics and courses • A hint written for every problem • Rewatch any lesson, or just one part of it • A cleaner design, dark by default

Smoother launch, a cleaner out-of-hearts screen, and fixes throughout.

A behind-the-scenes update: small fixes that keep Nabla running smoothly. Your streak, progress, and study plan carry over untouched — just open the app and pick up where you left off.

A fresh look and a smoother start. • New icon and launch: Del's eyes, on the Nabla gradient. • Pick the formulas your Lock Screen and Home Screen widgets show, and they rotate through them. • Reminders now open the exact lesson you were on, and Del checks in if you've been away. • Clearer feedback: one Del at a time when you check an answer. • A cleaner formula sheet and a tighter first-run tour. • Fixes for hearts, widgets and small layout details.

Del's Formula Deck widget: a formula from the course you're studying, a new one every hour. Flip it like a flashcard (When to reach for it → Show formula → Knew it / Next) without opening the app. On the Home Screen and the Lock Screen. • Del's Next Move widget: your next lesson, streak and today's goal at a glance. • All 7 courses rebuilt to teach before they test: explore the idea, see it worked, then make it stick. • Worked solutions for every problem: the plan, each move, and why it's allowed. Every answer and step is checked by a computer algebra system. SMARTER LEARNING • Lessons now check what they build on. Missing a basic? You get a short refresher first, then you're right back where you left off. • Math Foundations is now completely free, so a refresher is never behind a paywall. • Mastery means something: a skill counts as mastered only after a clean run on questions you haven't seen, and the ones you miss come back later. • Wrong answers get a real diagnosis, and the options after a miss are clearer: try a similar one, replay that part of the lesson, or move on. POLISH • A shorter, smoother onboarding with no quiz before your first lesson. • A new first-look tour that shows you exactly what each part of Home does. • A redesigned Home that puts today's move first, even at large text sizes. • Smoother animations and lower battery use. • Many fixes across light and dark mode.

• A short first-run tour: where to start, how hearts and streaks work, how to switch course, and where to find the formula reference. • The course picker now opens on your own course. • Smoother pop-ups, hint sheet and formula panel. • Fixed clipped button text and a few blank-screen bugs. • Faster launch and faster screen transitions.

Getting started is faster and clearer. • New setup: pick your course, your deadline, your level and what trips you up. Four taps, then a plan built from your answers. • Your plan shows the whole course up front — how many topics there are, and exactly how much of it is free. • The first lesson is optional and takes two minutes. Mistakes cost no hearts, so you can just try it and see how a lesson feels. • Calculus I & II, Linear Algebra, Multivariable, Differential Equations and Probability & Statistics come first. Math Foundations is still there if you want the algebra refresher. • Del now remembers the mistakes you make and brings them back before they fade, with guided steps instead of just the answer. • Add the Home Screen widget and set a study reminder during setup, or skip both. • Tidier home screen and Exam Mode layouts, widget fixes on iOS 16, and Del finally waves properly.

Meet the new Nabla Home Screen widget—see your next lesson, upcoming reviews, and daily goal at a glance. This update also brings a smoother onboarding experience, visual improvements, and performance fixes.

A smoother, more interactive onboarding experience with Del. Improved home widgets and smart reminders. Review missed steps directly from lesson results. Navigate back through completed questions more easily. Improved readability for formulas and answer choices. Redesigned heart-limit and Nabla Pro prompts. Smoother app startup and screen transitions. General UI, spacing, stability, and performance improvements.

Stay on track with smarter daily study reminders and streak rescue notifications. A refreshed onboarding experience that builds your personalized learning route. Improved Pro paywall with clearer plan selection and benefits. Better formula readability, scaling, and layout across the app. Jump ahead to locked lessons through skill checkpoints. Various visual fixes and performance improvements.

Improved formula viewing with smooth pinch-to-zoom support. Large formulas can now be resized and explored more easily. Added quicker access to Nabla Pro from the home screen. Improved iOS stability and runtime reliability. Updated dependencies and included general performance improvements.

Personalized Study Plans: Diagnostic placement test and tailored learning paths based on your goals. Animated Mascot Feedback: Meet the all-new expressive Del with real-time speech and face animations during lessons. Performance & UX Polish: Fixed math formula rendering issues and improved app navigation smoothness.