Calculate84 vs PAC Agent
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
PAC Agent
This AI-powered study companion integrates with your university's learning management system to provide course-specific answers and organize assignments. It helps you track deadlines, generate study materials, and manage your academic progress all in one place.
- AI chatbot grounded in course materials
- Syncs with university LMS
- Assignment and deadline tracking
- Generate study guides and summaries
- Export documents to PDF
- Multi-university support
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PAC Agent is an AI-powered study companion that connects directly to your university's learning management system (LMS) — so it always knows what you're actually working on. CHAT WITH AN AI THAT KNOWS YOUR COURSEWORK Ask questions and get answers grounded in your real courses, readings, and assignments — not generic guesses. Switch between specialized agents for different kinds of help, and pick up any past conversation right where you left off. EVERYTHING FROM YOUR LMS, IN ONE PLACE Connect your university account once and PAC Agent keeps your courses, assignments, announcements, discussions, and grades in sync automatically. Browse resources, track upcoming deadlines, and see how you're doing across every class without switching apps. NEVER MISS A DEADLINE A clear, color-coded view of what's due today, this week, and beyond. Create new assignments with a due date and time, attach a file, and get AI help on them directly from the assignment page. TURN AI ANSWERS INTO REAL DOCUMENTS Ask PAC Agent to write up a study guide, summary, or outline, and export it straight to PDF from the chat — ready to share or print. TRACK YOUR USAGE, MANAGE YOUR PLAN See exactly how much you're using PAC Agent, review your billing history, and manage your subscription — all from the app. BUILT FOR HOW YOU ACTUALLY STUDY Switch your display timezone independently of your device, and move between multiple universities if you have access to more than one.
Screenshots
Verdict
The clearest difference is in-app purchases: PAC Agent at none against Calculate84's 6. PAC Agent also leads on ads (none vs shown) and update cadence (daily vs fortnightly). Calculate84's advantage is ratings volume (54K vs 1) and chart position (#210 vs unranked). 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. PAC Agent asks for nothing beyond the download.
PAC Agent holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Calculate84 has 54K ratings behind it against 1, so its average is the more settled of the two.
Calculate84 ships an update fortnightly, PAC Agent daily. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.
| Parameter | Calculate84 | PAC Agent |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (54K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 74.6% of reviews | — |
| Number of ratings | 54K — better | 1 |
| Update frequency | Fortnightly | Daily — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Best chart rank | #210 — better | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPod |
| Requires iOS | 18.0 | 15.5 — better |
| Further details — not scored | ||
| Size | 71 MB | 33 MB |
| Age rating | 12+ | 4+ |
| Developer | Century Light LLC | AURIGA IT CONSULTING PRIVATE LIMITED |
Customer experience
Calculate84
PAC Agent
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
PAC Agent
Not enough reviews yet to summarise bugs or requests.
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
PAC Agent
No in-app purchases
Questions
Is Calculate84 free?
Is PAC Agent free?
Which has better reviews, Calculate84 or PAC Agent?
Do Calculate84 or PAC Agent have ads?
Which is updated more often, Calculate84 or PAC Agent?
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