Calculate84 vs Common App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculate84
This app offers a modern graphing calculator experience on your iPhone. It features fast, interactive touch-screen graphing, scrollable windows, and intelligent error messages for a more intuitive user experience. Designed to be a usable alternative to physical graphing calculators.
- Fast, interactive touch-screen graphing
- Scrollable windows
- Intelligent error messages
- Intuitive interface
- Designed for TI-84 users
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Graphing made for iPhone Calculate84 brings the graphing calculator experience to iPhone with a fast, touch-friendly design. What you can do: • Plot and explore graphs with smooth touch controls • Find familiar calculator functions quickly • Scroll naturally through equations and results • Get clearer, more helpful error messages • Send feedback directly from the app Why we built Calculate84 We relied on graphing calculators ourselves and wanted an app that felt easier to use on a modern phone. Before launch, we worked with students to refine the experience, and we continue improving it based on user feedback. Send feedback Tap the red Feedback button in the app. Terms of Use (EULA): https://calculate84.com/terms-of-use
Common App
Manage your college applications on the go. This app offers a secure and streamlined way to apply to over 1000 colleges, research financial aid options, and access guidance from counselors, all from your mobile device.
- Apply to 1000+ colleges
- Research financial aid
- Get counselor advice
- Secure application process
- Mobile convenience
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Simplify your college application experience with Common App for mobile. Common App for mobile provides you with the same secure, streamlined application experience you’ve come to expect from Common App online, all from the convenience of your mobile device. The app seamlessly integrates with the first-year desktop experience — allowing you to apply to more than 1000 colleges, research financial aid, and get advice from counselors. Common App for mobile is free and easy to use. Download the app to navigate your entire college application journey.
Screenshots
Verdict
The clearest difference is review sentiment: Calculate84 at 75% against Common App's 23%. Calculate84 also leads on rating (4.8 vs 3.0) and update cadence (fortnightly vs every 9 months). Common App's advantage is in-app purchases (none vs 6) and ads (none vs shown). On price and device support 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. Calculate84 sells 6 in-app purchases, starting at $2.99 per month. Common App asks for nothing beyond the download.
Calculate84 holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Calculate84 has 54K ratings behind it against 677, so its average is the more settled of the two. Written reviews point the same way: 75% of Calculate84's written reviews are positive against 23% of Common App's.
Calculate84 ships an update fortnightly, Common App every 9 months. The most recent releases landed on October 28, 2026 and October 27, 2026 respectively.
| Parameter | Calculate84 | Common App |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (54K ratings) — better | 3.0 (677 ratings) |
| Positive reviews | 74.6% of reviews — better | 22.9% of reviews |
| Number of ratings | 54K — better | 677 |
| Update frequency | Fortnightly — better | Every 9 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Best chart rank | #88 | #27 — better |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 18.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 71 MB | 16 MB |
| Age rating | 12+ | 4+ |
| Developer | Century Light LLC | The Common Application |
Customer experience
Calculate84
Common App
User reviews
Calculate84
From 54K App Store ratingsWhat we love
- 👍 Identical to TI-84 calculator
- 🚀 Seamless and intuitive user experience
- 💰 Affordable alternative to physical calculator
- 📱 Convenient to have on phone
- 🔍 Comprehensive functionality matching physical calculator
Room to improve
- 🐛 Occasional bugs and crashes
- 🔍 Missing some advanced features like regression types
- 🔒 Previous purchases removed without warning
- 💰 Subscription model can be expensive
- 📺 Intrusive ads in free version
Common App
From 677 App Store ratingsWhat we love
- 🚀 Convenient mobile app
- 👍 Same functionality as website
- 🎉 Finally available as an app
Room to improve
- 🐛 Crashes and freezes
- 🔑 Requires re-login every time
- 🚫 Doesn't work for transfer students
Bugs and requests
Calculate84
Reported bugs
4 issues- Crashes when using 2-sample T/Z interval functions
- Incorrect results for inverse trig functions
- Issues with graphing parabolas and tracing points
- Regression equation not displayed correctly
Requested features
5 requests- Add TVM solver functionality
- Implement more regression types
- Allow disabling of ads for free users
- Restore previous purchase benefits
- Optimize for mobile experience instead of emulating physical calculator
Common App
Reported bugs
3 issues- White screen on login
- App doesn't load past logo
- Redirects transfer students to website
Requested features
3 requests- Keep user logged in for longer
- Increase text box size
- Add back button navigation
In-app purchases
Calculate84
- Monthly Pro Subscription3 Days trial$2.991 Month
- Annual Pro Subscription7 Days trial$6.991 Year
- Lifetime Subscription$6.99
- Lifetime Subscription$9.99
- Lifetime Subscription$12.99
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- Lifetime Pro Subscription$29.99
Common App
No in-app purchases
Questions
Is Calculate84 free?
Is Common App free?
Which has better reviews, Calculate84 or Common App?
Do Calculate84 or Common App have ads?
Which is updated more often, Calculate84 or Common App?
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Other comparisons
