Comparison

Vimi vs Chalk

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Vimi

This AI-powered math tutor creates personalized learning paths to help users master math concepts. It offers adaptive lessons, clear explanations, and engaging exercises tailored to school curricula, making learning approachable and fun.

Highlights
  • Personalized learning paths
  • Adaptive lessons
  • Curriculum-aligned content
  • Clear explanations
  • Engaging exercises
  • Instant feedback and solutions
  • Progress tracking
Features
Currently charting
Read full description

Master math with Vimi, your personal AI tutor that makes learning simple, fast, and fun. Vimi figures out your level and designs a personalized path that fits you. You’ll get quick, adaptive lessons that fill in your knowledge gaps and help you feel in control again. Vimi helps you finally feel confident in class with short, engaging lessons built around your school’s curriculum, so every topic you practice matches what you’re learning in school. It’s like having a friendly local tutor who explains things clearly, no confusing terms, just simple explanations that actually make sense. With Vimi, math feels approachable and fun, thanks to a game-like experience that keeps you motivated. Each session includes short exercises that focus on what you need most, instant feedback with helpful hints and full solutions, plus a progress tracker so you can see how far you’ve come. Learn key topics including: Fractions, percentages, equations, inequalities, geometry, functions, probability, statistics, logic, and more. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Chalk

This AI-powered math tutor visually explains concepts step-by-step on a digital whiteboard, offering personalized guidance and identifying errors. It covers a wide range of math subjects, adapting to your learning pace and progress.

Highlights
  • Visual step-by-step explanations
  • Real handwriting on digital whiteboard
  • Audible reasoning and explanations
  • Live error detection and correction
  • Comprehensive math subject coverage
  • Adaptive learning and progress tracking
Features
Read full description

The math tutor that teaches — not just answers. Chalk draws every step on a real whiteboard in human handwriting, explains its thinking out loud, and asks you the right questions along the way — like a great tutor at the board. Write a problem with Apple Pencil, type it, or scan it, and work through it together. WATCH IT DRAW Every step appears on the board stroke by stroke — equations, graphs, diagrams — in real handwriting, never a wall of text. HEAR IT THINK Chalk talks you through each move in a natural voice, so you follow the reasoning, not just the result. IT CATCHES YOUR MISTAKES Write your own work on the board and Chalk checks it live, underlines the exact step that went wrong, and shows you why. IT NEVER JUST GIVES ANSWERS Chalk guides you to the solution so you can do it yourself on the test. Parents and teachers approve; answer-scanner apps don't teach. EVERY COURSE, ONE TUTOR Pre-Algebra, Algebra 1 & 2, Geometry, Trigonometry, Pre-Calculus, Calculus, Linear Algebra, Statistics and more — with lessons that adapt to your pace and progress tracking that shows your mastery climb. MADE FOR iPHONE AND iPAD Full whiteboard with Apple Pencil support on iPad, and a beautiful board built for one hand on iPhone. START WITH A FREE TRIAL Try Chalk Lite free for 3 days — 3 full problems a day with the tutor. Keep it for $5.99/month, or cancel before the trial ends and pay nothing. Chalk Plus ($11.99/month, 400 tutor messages) and Chalk Pro ($17.99/month, 700 messages) are there when you need more. Chalk — the tutor that draws back. SUBSCRIPTION DETAILS Chalk Lite, Chalk Plus, and Chalk Pro are auto-renewable monthly subscriptions. Chalk Lite includes a 3-day free trial for new subscribers; payment is charged to your Apple Account when the trial ends, or at confirmation of purchase for plans without a trial. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period (or the trial), and can be managed or cancelled anytime in your Apple Account settings after purchase. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Chalk Terms of Service: https://try-chalk.com/app/legal/terms Privacy Policy: https://try-chalk.com/app/legal/privacy

Screenshots

Vimi4 screens
Chalk4 screens

Verdict

The call

The clearest difference is review sentiment: Chalk at 100% against Vimi's 60%. Chalk also leads on ads (none vs shown) and rating (5.0 vs 4.6). Vimi's advantage is monetization model (free vs freemium) and ratings volume (914 vs 1). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Vimi sells 7 in-app purchases, starting at $19.99 per month and Chalk sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Chalk holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Vimi has 914 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 60% of Vimi's written reviews are positive against 100% of Chalk's.

UpkeepUpdate frequency

Vimi ships an update every 9 days, Chalk every 4 days. The most recent releases landed on September 22, 2026 and September 19, 2026 respectively.

Scorecard7 real differences · 4 level
Vimi versus Chalk: the parameters behind the verdict, then further details
ParameterVimiChalk
PriceFreeFree
Rating4.6 (914 ratings)5.0 (1 ratings) — better
Positive reviews59.8% of reviews100.0% of reviews — better
Number of ratings914 — better1
Update frequencyEvery 9 daysEvery 4 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree — betterFreemium
Best chart rank#196 — better—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.617.0 — better
Further details — not scored
Size117 MB1 MB
Age rating4+4+
DeveloperVIMI ADAPTIVE LEARNING LTDtyler hayes

Customer experience

Vimi

All ratings914 ratings
Positive89.4%
Neutral2.4%
Negative8.2%
Written reviews97 reviews
Positive59.8%
Neutral9.3%
Negative30.9%

Chalk

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

7 purchases

Vimi

Subscriptions7
  • summer_promotion1 Month trial$19.991 Month
  • Vimi Monthly Premium3 Days trial$19.991 Month
  • Vimi Monthly Premium7 Days trial$19.991 Month
Show 4 more
  • Vimi monthly Premium$19.991 Month
  • Vimi 3 months subscription3 Days trial$44.993 Months
  • Vimi Premium Annual7 Days trial$154.991 Year
  • Vimi Annual Premium$154.991 Year
3 purchases

Chalk

Subscriptions3
  • Chalk Lite$9.991 Month
  • Chalk Plus$14.991 Month
  • Chalk Pro$24.991 Month

Questions

Is Vimi free?
Vimi is free to download, with in-app purchases available.
Is Chalk free?
Chalk is free to download, with in-app purchases available.
Which has better reviews, Vimi or Chalk?
Chalk is rated higher. Vimi averages 4.6 out of 5 from 914 ratings, while Chalk averages 5.0 from 1 ratings.
Do Vimi or Chalk have ads?
Vimi shows ads; Chalk does not.
Which is updated more often, Vimi or Chalk?
Vimi ships an update every 9 days, and Chalk every 4 days. Most recently, Vimi was updated on September 22, 2026 and Chalk on September 19, 2026.

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