Comparison

Calculate84 vs Gradescope

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

Head to head
About

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.

Highlights
  • Fast, interactive touch-screen graphing
  • Scrollable windows
  • Intelligent error messages
  • Intuitive interface
  • Designed for TI-84 users
Features
Currently charting
Read full description

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

About

Gradescope

Easily upload assignments for courses using this app. Submit files from your device or scan your work directly. Assign pages for variable-length assignments and resubmit if needed before the deadline.

Highlights
  • Upload assignments
  • Scan documents with camera
  • Select existing files
  • Assign pages for variable-length assignments
  • Resubmit assignments
  • View submitted and graded assignments
Features
Read full description

Students, upload your assignments to Gradescope more easily than ever before! If your instructor uses Gradescope for your assignments, you can now upload your submission with our mobile app. After installing and opening the app, login to see your Gradescope courses and assignments. To upload a submission, click on the assignment in the “Not Submitted” tab and either “Select File” to select an existing file from your device or “Scan” all pages of your completed work using your iPhone’s camera. Once you submit your file(s), for templated assignments, you’re all set. For variable-length assignments, “Assign pages” to indicate where your answer for each question appears within your submission. It’s that easy! After confirming, your assignment then moves to the “Submitted” tab. If needed, you can resubmit your assignment until the due date your instructor set has passed. Once it is graded and grades are published for the assignment, it then moves to the “Graded” tab. Note: For V1 of the app, you will be directed to our mobile website for any advanced functionality, including viewing feedback and submitting timed, programming, or online assignments. Stay tuned for future updates that will allow you to do even more with our mobile app!

Screenshots

Calculate844 screens
Gradescope4 screens

Verdict

The call

The clearest difference is review sentiment: Calculate84 at 75% against Gradescope's 9%. Calculate84 also leads on rating (4.8 vs 1.4) and ratings volume (54K vs 273). Gradescope'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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Calculate84 sells 6 in-app purchases, starting at $2.99 per month. Gradescope asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Calculate84 holds the better App Store score, 4.8 against 1.4. That said, the two scores are not equally well evidenced: Calculate84 has 54K ratings behind it against 273, 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 9% of Gradescope's.

UpkeepUpdate frequency

Calculate84 ships an update fortnightly, Gradescope every 2 months. Both last shipped on October 24, 2026.

Scorecard9 real differences · 2 level
Calculate84 versus Gradescope: the parameters behind the verdict, then further details
ParameterCalculate84Gradescope
PriceFreeFree
Rating4.8 (54K ratings) — better1.4 (273 ratings)
Positive reviews74.6% of reviews — better8.7% of reviews
Number of ratings54K — better273
Update frequencyFortnightly — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#173 — better—
DevicesiPhone, iPad, Mac — betteriPhone, iPod
Requires iOS18.013.4 — better
Further details — not scored
Size71 MB37 MB
Age rating12+4+
DeveloperCentury Light LLCTurnitin

Customer experience

Calculate84

All ratings53,397 ratings
Positive95.1%
Neutral1.8%
Negative3.1%
Written reviews386 reviews
Positive74.6%
Neutral8.8%
Negative16.6%

Gradescope

All ratings259 ratings
Positive7.3%
Neutral3.5%
Negative89.2%
Written reviews104 reviews
Positive8.7%
Neutral6.7%
Negative84.6%

User reviews

Calculate84

From 54K App Store ratings

What 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

Gradescope

From 273 App Store ratings

What we love

  • 🚀 Quick and effective submission process
  • 👍 Clean and well-designed app
  • 📸 Convenient scanning and photo upload

Room to improve

  • 🔑 Frequent log-in issues and lack of session persistence
  • 📱 Suboptimal iPad and tablet experience
  • 🐛 Buggy scanning and submission functionality
  • 🤔 Lack of key features like viewing graded assignments

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

Gradescope

Reported bugs

3 issues
  • Camera flash issues during scanning
  • Photos not uploading in correct order
  • Inconsistent download button behavior

Requested features

3 requests
  • Ability to sort assignments by due date
  • Integration of tools for instructors
  • Improved iPad and tablet optimization

In-app purchases

6 purchases

Calculate84

Subscriptions2
  • Monthly Pro Subscription3 Days trial$2.991 Month
  • Annual Pro Subscription7 Days trial$6.991 Year
One-time4
  • Lifetime Subscription$6.99
  • Lifetime Subscription$9.99
  • Lifetime Subscription$12.99
Show 1 more
  • Lifetime Pro Subscription$29.99
None

Gradescope

No in-app purchases

Questions

Is Calculate84 free?
Calculate84 is free to download, with in-app purchases available.
Is Gradescope free?
Gradescope is free to download, with no in-app purchases.
Which has better reviews, Calculate84 or Gradescope?
Calculate84 is rated higher. Calculate84 averages 4.8 out of 5 from 54K ratings, while Gradescope averages 1.4 from 273 ratings.
Do Calculate84 or Gradescope have ads?
Calculate84 shows ads; Gradescope does not.
Which is updated more often, Calculate84 or Gradescope?
Calculate84 ships an update fortnightly, and Gradescope every 2 months. Most recently, Calculate84 was updated on October 24, 2026 and Gradescope on October 24, 2026.

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