Calculate84
Intended for use with TI-84
Free · In-App Purchases
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
Ratings & Reviews
Improved equation history and result formatting, more reliable Pro purchases, better accessibility, and fixes for math input and stability.
The developer, Century Light LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Size
- 74.2 MB
- Category
- Education
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 14.0 or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Contains
Advertising
- In-App Purchases
Yes
- Annual Pro Subscription 59,00 kr
- Monthly Pro Subscription 29,00 kr
- Lifetime Subscription 89,00 kr
- Lifetime Subscription 59,00 kr
- Lifetime Pro Subscription 249,00 kr
- Lifetime Subscription 99,00 kr
- Provider
Century Light LLC
- Century Light LLC has identified itself as a trader for this app and confirmed that this product or service complies with European Union law.
- DUNS Number
117450434 - Address
43313 Woodward Ave
Unit 1435
Bloomfield Hills Michigan 48302-5007
United States - Phone Number
+1 2489710085 - Email
support@calculate84.com
- Copyright
- © 2026 Century Light LLC
