# TT Pre vs Calculus

The clearest difference is in-app purchases: TT Pre at none against Calculus's 13. TT Pre also leads on update cadence (every 2 months vs every 16 months) and iOS requirement (12.0 vs 15.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Calculus sells 13 one-off in-app purchases. TT Pre asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.6 for TT Pre against 3.5 for Calculus. Both are backed by a comparable volume of ratings — 9 and 4 respectively. Written reviews are what separate them: 29% of TT Pre's written reviews are positive against 33% of Calculus's.

TT Pre ships an update every 2 months, Calculus every 16 months. The most recent releases landed on October 8, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | TT Pre | Calculus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (9 ratings)](https://appshunter.io/ios/app/tt-pre-calculus/id1516358298/reviews)** | [3.5 (4 ratings)](https://appshunter.io/ios/app/calculus-pro/id1638196645/reviews) |
| Number of ratings | **9** | 4 |
| Positive reviews | 28.6% of reviews | **33.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 16 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 88 MB | 40 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Teaching Textbooks, Inc.](https://appshunter.io/developer/1516345361) | [Richard Ssenyonjo](https://appshunter.io/developer/1528776742) |

## What reviewers say

### TT Pre

[App page](https://appshunter.io/ios/app/tt-pre-calculus/id1516358298)

This educational app provides comprehensive pre-calculus lessons and practice problems. It features audiovisual lectures, automated grading, and step-by-step explanations to help students learn independently. Parental controls allow progress tracking, and the digitized textbook is searchable.

**Highlights:** 95 audiovisual lectures, Thousands of practice problems, Automated grading and instant feedback, Step-by-step audiovisual explanations, Parental progress tracking, Digitized textbook with search

**In-app purchases:** none


### Calculus

[App page](https://appshunter.io/ios/app/calculus-pro/id1638196645)

Learn calculus comprehensively through 10 chapters and reinforce your understanding with an interactive quiz game. This app caters to both beginners and advanced learners, offering hints and challenging problems. Enjoy a clear, adaptable interface with font size adjustments and light/dark mode support.

**Highlights:** 10-chapter calculus curriculum, Interactive calculus quiz game, Beginner to advanced learning paths, Adjustable font size, Light and dark mode support, Covers differentiation, integration, and differential equations

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get 1,000 Coins | $0.99 | one-time |
| Get 5,000 Coins | $1.99 | one-time |
| Get 10,000 Coins | $2.99 | one-time |
| Unlock Calculus 1 | $2.99 | one-time |
| Unlock Calculus 2 | $2.99 | one-time |
| Unlock Calculus 3 | $2.99 | one-time |
| Unlock Chapter 5 | $2.99 | one-time |
| Unlock Calculus 8 | $2.99 | one-time |
| Unlock Calculus 9 | $2.99 | one-time |
| Unlock Calculus 4 | $2.99 | one-time |
| Unlock Calculus 6 | $2.99 | one-time |
| Unlock Calculus 7 | $2.99 | one-time |
| Unlock Calculus 10 | $2.99 | one-time |


## Frequently asked questions

### Is TT Pre free?

TT Pre is free to download, with no in-app purchases.

### Is Calculus free?

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

### Which has better reviews, TT Pre or Calculus?

TT Pre is rated higher. TT Pre averages 3.6 out of 5 from 9 ratings, while Calculus averages 3.5 from 4 ratings.

### Do TT Pre or Calculus have ads?

Neither TT Pre nor Calculus shows ads.

### Which is updated more often, TT Pre or Calculus?

TT Pre ships an update every 2 months, and Calculus every 16 months. Most recently, TT Pre was updated on October 8, 2026 and Calculus on September 27, 2026.

---

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