Comparison

MiaoPiano vs Calculate 84 AI

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

Head to head
About

MiaoPiano

Features
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MiaoPiano – Learn Piano with a Playful Cat Twist! MiaoPiano makes learning to play piano fun and simple for everyone! Whether you're a complete beginner or have some experience, this cat-themed app helps you discover the joy of music. By tapping on the music sheet, the app plays each note, guiding you through beautiful piano pieces. It’s a perfect, easy-to-use app for anyone wanting to learn piano! Engaging Piano Learning Experience MiaoPiano offers an interactive way to play piano. Tap the notes on the sheet, and watch as the app plays them, helping you follow along and learn the melody. Our library includes a wide variety of songs from genres like Classical, Pop, and more. The app keeps things exciting with its charming cat visuals and intuitive design, making learning piano a delightful experience. Choose from a Variety of Songs With MiaoPiano, you can explore a large library of songs suitable for all levels. Whether you’re a beginner or an intermediate player, you’ll find a song that fits your skills. Our constantly growing library offers something for everyone, from classical masterpieces to modern favorites. Step-by-Step Learning MiaoPiano guides you through every step of your learning journey. From understanding how to read sheet music to mastering techniques like playing with both hands, MiaoPiano makes the process easy. You’ll improve your skills with structured lessons on scales, chords, and more advanced topics, all at your own pace. Why MiaoPiano? • Simple, intuitive design perfect for beginners • Fun, cat-themed visuals to keep learners engaged • Extensive library of songs for all skill levels What People Are Saying: "MiaoPiano makes learning piano so much fun! The cute cat theme keeps my kids engaged, and I’ve seen real progress in their playing." "Easy to use and enjoyable! I never thought learning piano could be this simple." "MiaoPiano helped me learn my favorite songs quickly. The step-by-step lessons really work!" Try MiaoPiano for Free Download MiaoPiano today and explore a selection of free songs and lessons. Perfect for beginners or hobbyists, you’ll find everything you need to get started on your piano journey. Upgrade to Premium Unlock more features with MiaoPiano Premium. Get access to exclusive songs, advanced lessons, and additional tools to help you progress faster. Subscription Options: Choose between monthly or yearly plans. Full Song Access: Unlock all songs, from classics to the latest hits. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Premium access is available on all your devices. Join Thousands of Happy Learners! Start your piano adventure today with MiaoPiano. Join our growing community of learners who are mastering the piano with a fun, interactive, and playful app. Music has never been this accessible – or this fun! For any questions or feedback, feel free to reach out to us. We’re here to help you on your musical journey! Terms of Service: https://miaopiano.com/term-page.html Privacy Policy: https://miaopiano.com/privacy-page.html

About

Calculate 84 AI

This AI-powered graphing calculator offers step-by-step guidance for complex math problems, from pre-algebra to calculus. It features interactive graphing, matrix operations, and statistical tools, making learning math intuitive and efficient.

Highlights
  • AI-guided step-by-step solutions
  • Comprehensive math coverage (Pre-Algebra to Calculus)
  • Interactive and dynamic graphing
  • Matrix and statistical calculations
  • Scrollable calculation history
  • Fraction and angle conversion support
Features
Read full description

The graphing calculator intended for use with TI-84, now supercharged with AI. Skip the tedious typing: snap a picture of your math problem, and our AI instantly sets up the calculator for you. THE AI MATH SCANNER Why type when you can scan? Point your camera at a worksheet, a data table, or a handwritten expression. In seconds, our AI extracts the math and prepares your graphing calculator. • Auto-fills your lists: Data tables go straight into the calculator list editor. • Enters Y= functions: Complex equations are typed out for you. • Sets the zoom window: The graphing window adjusts perfectly to your math. Review the setup, tap Insert, and you are ready to solve. It is a massive time saver. CALCULATE LIKE IN CLASS Every key on this calculator sits exactly where you expect it. Every menu matches what you see on the board. Get the precise answers your teacher expects from a graphing calculator. • Toggle exact or decimal calculator answers. • Work with fractions and mixed numbers. • Switch seamlessly between degrees and radians. • Reuse past entries from the smart calculator home screen. GRAPH AND ANALYZE Turn your phone into a powerful graphing calculator. Graph functions, inequalities, parametric, polar, and sequence equations effortlessly. • Find intersections, zeros, minima, and maxima right on the graph. • Calculate derivatives and integrals visually. • Customize your graphing calculator with colors and line styles. • Let the window automatically follow your data. STATISTICS AND PROBABILITY Run advanced statistics just like you would on a physical calculator. • Compute every regression from linear to logistic. • Work with normal, binomial, Poisson, t, and chi-square distributions. • Use the exact same argument order you learned in class. • Fill out clean forms for hypothesis tests and confidence intervals. SOLVE AND COMPUTE Speed through assignments with built-in calculator tools. Use a numeric equation solver, a polynomial root finder, and a solver for systems of equations. Handle matrices with rref, determinants, and inverses. Run the finance solver for TVM and amortization. TEXTBOOK-PERFECT DISPLAY Math on your calculator should look like real math. Fractions stack neatly, roots look real, and long results stay perfectly readable. Share your calculator screen instantly as an image. Customize your experience with beautiful themes, and explore a searchable catalog that explains every calculator command. YOUR PERSONAL AI TUTOR Stuck on the keys? Ask the app by text or voice. Say "How do these graphs intersect?" and get numbered steps with real keys presented as tappable chips. Tap a chip, and the app opens the exact calculator menu you need. This builds real understanding and confidence for homework, tests, and exams. WHO IS IT FOR? High school and college students mastering algebra, calculus, statistics, and prepping for the SAT & ACT. Teachers who want to project a graphing calculator in class. Anyone who needs a top-tier calculator in their pocket, on their phone, and on their Mac. --- Calculate 84 AI Subscriptions • Free to try with included smart scans and tutor questions. • Upgrade to Plus or Pro for many more scans and tutor questions, or unlock the calculator for good with a one-time purchase. • Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Manage your subscription in Account Settings. Terms of Service: https://fredinax.com/terms/ Privacy Policy: https://fredinax.com/privacy/ TI-84 is a registered trademark of Texas Instruments Incorporated. Calculate 84 AI is not affiliated with Texas Instruments.

Screenshots

MiaoPiano4 screens
Calculate 84 AI4 screens

Verdict

The call

The clearest difference is iOS requirement: MiaoPiano at 15.0 against Calculate 84 AI's 17.0. On price, update cadence, ads and in-app purchases 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. MiaoPiano sells 3 in-app purchases, starting at $2.99 per month and Calculate 84 AI sells 7 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

MiaoPiano ships an update every 3 weeks, Calculate 84 AI fortnightly. The most recent releases landed on October 27, 2026 and November 4, 2026 respectively.

Scorecard1 real difference · 9 level
MiaoPiano versus Calculate 84 AI: the parameters behind the verdict, then further details
ParameterMiaoPianoCalculate 84 AI
PriceFreeFree
Rating—4.6 (42 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—42 — better
Update frequencyEvery 3 weeksFortnightly — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size99 MB65 MB
Age rating4+4+
DeveloperHoang VietFredinax Graphing Calculator

In-app purchases

3 purchases

MiaoPiano

Subscriptions2
  • MiaoPiano 1 month subscription$2.991 Month
  • MiaoPiano 1 year subscription7 Days trial$29.991 Year
One-time1
  • Life Time Access$99.99
7 purchases

Calculate 84 AI

Subscriptions7
  • Calculate AI PRO - Monthly3 Days trial$1.991 Month
  • Calculate AI PRO - Monthly7 Days trial$1.991 Month
  • Calculate AI PRO - Monthly7 Days trial$3.991 Month
Show 4 more
  • Calculate AI PRO - Yearly7 Days trial$5.991 Year
  • Calculate AI PRO - Yearly7 Days trial$12.991 Year
  • Calculate AI PRO - Yearly7 Days trial$17.991 Year
  • Calculate AI PRO - Yearly7 Days trial$24.991 Year

Questions

Is MiaoPiano free?
MiaoPiano is free to download, with in-app purchases available.
Is Calculate 84 AI free?
Calculate 84 AI is free to download, with in-app purchases available.
Do MiaoPiano or Calculate 84 AI have ads?
Neither MiaoPiano nor Calculate 84 AI shows ads.
Which is updated more often, MiaoPiano or Calculate 84 AI?
MiaoPiano ships an update every 3 weeks, and Calculate 84 AI fortnightly. Most recently, MiaoPiano was updated on October 27, 2026 and Calculate 84 AI on November 4, 2026.

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