Calculator₊ vs ChalkCast
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator₊
This app offers a comprehensive suite of calculation tools, including basic, scientific, and unit conversions. It features an AI-powered math solver that can solve problems from photos and provides a dedicated space for math notes. Accessibility features ensure ease of use for all users.
- Basic and scientific calculations
- Unit and currency converter
- AI-powered math solver with photo recognition
- Math notes with instant solutions
- Calculation history log
- Accessibility features (Dynamic Text Size, VoiceOver, High-Contrast Mode)
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America's #1 Calculator App! Download Calculator₊ Now - Your All-in-One Math Solution! We're excited to announce the biggest update to Calculator₊ in 10 years! With over 200 million downloads and a whopping 3 million+ 5-star ratings, Calculator₊ is the trusted choice of millions worldwide. And now, it's even better! More Than Just Your Average Calculator! • Standard Calculator: Breeze through basic arithmetic operations like addition, subtraction, multiplication, and division. • Scientific Calculator: Tackle complex calculations with ease, including trigonometric, logarithmic, and exponential functions. • Calculation History: Keep track of your past calculations with a detailed history log. • Unit Converter: Effortlessly convert units like inches to centimeters and much more, making it a handy tool for everyday use. • Percentage Calculator: Easily calculate percentages, increases, and decreases with pre-designed input fields that do the work for you. • Currency Converter: Convert currencies in real-time, including Bitcoin, with the latest exchange rates. • Fraction Calculator: Work seamlessly with fractions – perfect for students and professionals alike. • Ad-Free Experience: Say goodbye to annoying full-screen ads and focus on your calculations. Be Amazed by Our New AI-Powered Math Solver! • AI Math Solutions: Instantly solve math equations, quizzes, and word problems with our advanced AI. Use the Photo Solver to snap a picture of any problem, and Calculator₊ will work its magic. • Math Notes: A dedicated note-taking tool for all your math needs. Jot down equations, diagrams, and notes in a space designed for mathematical thinking. • Instant Math: In Math Notes mode, simply write an equation, add an "=", and Calculator₊ will generate the solution in real-time. Built for Everyone, Now Even More Accessible! Calculator₊ is designed to work effortlessly for all users, no matter how you use your iPhone, and includes these additional accessibility features: • Dynamic Text Size: Scale the calculator interface to the text size that works best for you, without losing layout clarity. • VoiceOver Support: Navigate & Calculate using VoiceOver, fully compatible with iOS accessibility settings. • High-Contrast Mode: A bold, high-contrast display that makes every button and result instantly readable in any lighting condition. • Dark and Light Mode: Calculator₊ automatically adjusts to your preferred mode. Why Choose Calculator₊? • Proven Track Record: Over a decade of providing fast and reliable calculations. • Loved by Millions: Join the 200+ million users who rely on Calculator₊, with an average rating of 4.7 stars from 3.5 million reviews. • Versatile & Powerful: Handles everything from basic sums to advanced scientific calculations. Perfect for school, work, or home. Celebrate with a Special Gift! To celebrate the release of this massive update, we're offering a 1-MONTH FREE TRIAL of our premium features, including: • Ad-Free Experience: No more pesky ads. • Unlimited AI Math Solving: Solve as many equations and problems as you need. • Unlimited Fraction Calculations: Ideal for students and professionals alike. • Unlimited Currency Conversions: Including real-time Bitcoin conversions. • Premium Customer Support: Get priority assistance from our expert support team. If you have any suggestions or questions, our support team is ready to help. Simply email us at support@impalastudios.com. Terms & Conditions: https://impalastudios.com/terms Privacy Policy: https://impalastudios.com/privacy
ChalkCast
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ChalkCast is a local network drawing board app that lets you draw, sketch, and broadcast your canvas to other devices on the same Wi-Fi network in real time. ● Draw and sketch freely on your device ● Broadcast your drawing board to other devices in real time ● Import images from your camera or photo gallery ● Discover and pair with nearby devices automatically ● Simple peer-to-peer connection — no account or internet required 【How It Works】 ChalkCast uses your local Wi-Fi network to connect devices directly. One device acts as the sender (ChalkCast) and the other as the receiver (SpiritBoard). No cloud servers, no sign-ups — just connect and start drawing. 【Privacy-First Design】 All data stays on your local network. No personal data is collected, no analytics, no ads, and no external servers involved.
Screenshots
Verdict
The clearest difference is in-app purchases: ChalkCast at none against Calculator₊'s 10. ChalkCast also leads on ads (none vs shown) and update cadence (weekly vs every 3 weeks). Calculator₊'s advantage is chart position (#93 vs unranked) and device support (5 vs 3). On price 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
Both are free to download. Calculator₊ sells 10 in-app purchases, starting at $0.99 per month. ChalkCast asks for nothing beyond the download.
Calculator₊ ships an update every 3 weeks, ChalkCast weekly. The most recent releases landed on November 7, 2026 and October 25, 2026 respectively.
| Parameter | Calculator₊ | ChalkCast |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.7M ratings) — better | — |
| Positive reviews | 63.1% of reviews | — |
| Number of ratings | 1.7M — better | — |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Best chart rank | #93 — better | — |
| Devices | iPhone, iPad, iPod, Apple Watch, Vision Pro — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 247 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Impala Studios | Huan Zhang |
Bugs and requests
Calculator₊
Reported bugs
2 issues- Incorrect calculation results for certain functions
- Inability to delete last entered digit without clearing entire calculation
Requested features
3 requests- Ability to delete individual calculation history entries
- More free advanced calculator features (fractions, currency, etc.)
- Improved ad placement that doesn't interfere with usage
ChalkCast
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Calculator₊
- Premium Member Special Offer7 Days trial$0.991 Month
- Monthly Premium Member3 Days trial$0.991 Month
- 1 Month Premium Access7 Days trial$1.491 Month
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- Half-Yearly Premium Member3 Days trial$3.996 Months
- Calculate Faster, AI, & No Ads3 Days trial$4.997 Days
- 1 Year Ad-Free3 Days trial$5.991 Year
- Calculate Faster, AI, & No Ads3 Days trial$5.997 Days
- 1 Month Premium Trial1 Month trial$5.997 Days
- Math Solver/Full Access/No Ads$5.997 Days
- 6 Months Premium Access7 Days trial$8.996 Months
ChalkCast
No in-app purchases









