# Calculate84 vs BigFuture School

Calculate84 and BigFuture School both sit at 4.8 stars, but that hides the real split: 75% of Calculate84's written reviews are positive against 28% of BigFuture School's. Calculate84 also leads on update cadence (fortnightly vs monthly) and device support (3 vs 1). BigFuture School's advantage is in-app purchases (none vs 6) and ads (none vs shown). On price, rating, ratings volume and iOS requirement there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.8 for Calculate84 against 4.6 for BigFuture School. Both are backed by a comparable volume of ratings — 54K and 19K respectively. Written reviews are what separate them: 75% of Calculate84's written reviews are positive against 28% of BigFuture School's.

Calculate84 ships an update fortnightly, BigFuture School monthly. Both last shipped on October 27, 2026.

## The numbers

| Metric | Calculate84 | BigFuture School |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (54K ratings)](https://appshunter.io/ios/app/calculate84/id1459712793/reviews)** | [4.6 (19K ratings)](https://appshunter.io/ios/app/bigfuture-school/id6462904878/reviews) |
| Number of ratings | **54K** | 19K |
| Positive reviews | **74.6% of reviews** | 28.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | #107 | **#4** |
| Size | 71 MB | 25 MB |
| Requires iOS | 18.0 | **17.1** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Century Light LLC](https://appshunter.io/developer/1459712792) | [The College Board](https://appshunter.io/developer/361264757) |

## What reviewers say

### Calculate84

[App page](https://appshunter.io/ios/app/calculate84/id1459712793)

**Currently charting:** #107 Top Free · Education (US App Store)

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:** Family Sharing, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Subscription | $2.99 | per month |
| Annual Pro Subscription | $6.99 | per year |
| Lifetime Subscription | $6.99 | one-time |
| Lifetime Subscription | $9.99 | one-time |
| Lifetime Subscription | $12.99 | one-time |
| Lifetime Pro Subscription | $29.99 | one-time |

**What reviewers like**

- 👍 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

**What reviewers complain about**

- 🐛 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

**Reported bugs**

- 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**

- 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


### BigFuture School

[App page](https://appshunter.io/ios/app/bigfuture-school/id6462904878)

**Currently charting:** #4 Top Free · Education, #174 Top Free (US App Store)

This app provides students with access to their test scores and personalized college and career information. It helps users plan and pay for college, and connects them with potential scholarship programs. Access requires a mobile number provided during a qualifying test.

**Highlights:** Access test scores, Connect with colleges and scholarships, Personalized career information, College planning and payment guidance

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 👍 Helpful information and resources
- 🚀 Straightforward navigation

**What reviewers complain about**

- 🐛 Login issues
- 🐛 Scores not showing up
- 🐛 Compatibility problems
- 🐛 Unresponsive customer support

**Reported bugs**

- Multiple accounts linked to one phone number
- Recovery email not working
- Scores not syncing between app and website

**Requested features**

- Ability to change phone number
- Better integration with College Board website
- More customization options
- Faster score reporting


## Frequently asked questions

### Is Calculate84 free?

Calculate84 is free to download, with in-app purchases available.

### Is BigFuture School free?

BigFuture School is free to download, with no in-app purchases.

### Which has better reviews, Calculate84 or BigFuture School?

Calculate84 is rated higher. Calculate84 averages 4.8 out of 5 from 54K ratings, while BigFuture School averages 4.6 from 19K ratings.

### Do Calculate84 or BigFuture School have ads?

Calculate84 shows ads; BigFuture School does not.

### Which is updated more often, Calculate84 or BigFuture School?

Calculate84 ships an update fortnightly, and BigFuture School monthly. Most recently, Calculate84 was updated on October 27, 2026 and BigFuture School on October 27, 2026.

### Which is more popular, Calculate84 or BigFuture School?

Calculate84 currently peaks at #107 in the App Store charts, and BigFuture School at #4. Chart position reflects recent download velocity rather than total install base.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*