# TT Pre vs K

The clearest difference is rating: K at 4.5 against TT Pre's 3.6. K also leads on update cadence (fortnightly vs every 2 months) and ratings volume (133 vs 9). TT Pre's advantage is in-app purchases (none vs 8) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. K sells 8 in-app purchases, starting at $1.99 per 3 months. TT Pre asks for nothing beyond the download.

K holds the better App Store score, 4.5 against 3.6. That said, the two scores are not equally well evidenced: K has 133 ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 29% of TT Pre's written reviews are positive against 0% of K's, so the app with the better star average is not the one people write more warmly about.

TT Pre ships an update every 2 months, K fortnightly. The most recent releases landed on September 11, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | TT Pre | K |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (9 ratings)](https://appshunter.io/ios/app/tt-pre-calculus/id1516358298/reviews) | **[4.5 (133 ratings)](https://appshunter.io/ios/app/k-12-math-learning-and-practice/id6446872948/reviews)** |
| Number of ratings | 9 | **133** |
| Positive reviews | **28.6% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 88 MB | 235 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) | [DEVWORLD VIETAM COMPANY LIMITED](https://appshunter.io/developer/1867412933) |

## 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


### K

[App page](https://appshunter.io/ios/app/k-12-math-learning-and-practice/id6446872948)

Master K-12 math with interactive games and practice covering algebra, calculus, and more. Features AI-powered explanations, quizzes, and a graphing calculator for on-the-go learning.

**Highlights:** Comprehensive math topics, AI-powered solver with explanations, Interactive quizzes, Smart graphing calculator, Video lessons and tips, Offline practice

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Three Months VIP | $1.99 | per 3 months |
| Learning Premium Monthly Plan | $1.99 | per month |
| One Month VIP | $4.99 | per month |
| Learning Premium HalfYear Plan | $5.99 | per 6 months |
| Learning Premium Annual Plan | $9.99 | per year |
| Six Months VIP | $24.99 | per 6 months |
| 1 Year VIP | $49.99 | per year |
| No ads Pack | $14.99 | one-time |


## Frequently asked questions

### Is TT Pre free?

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

### Is K free?

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

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

K is rated higher. TT Pre averages 3.6 out of 5 from 9 ratings, while K averages 4.5 from 133 ratings.

### Do TT Pre or K have ads?

K shows ads; TT Pre does not.

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

TT Pre ships an update every 2 months, and K fortnightly. Most recently, TT Pre was updated on September 11, 2026 and K on September 24, 2026.

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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.*