# ERSB vs TT Math 3

The clearest difference is price: TT Math 3 at Free against ERSB's $149.99. TT Math 3 also leads on device support (4 vs 1). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

TT Math 3 is free to download; ERSB costs $149.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ERSB ships an update every 6 weeks, TT Math 3 every 2 months. The most recent releases landed on September 15, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | ERSB | TT Math 3 |
| --- | --- | --- |
| Price | $149.99 | **Free** |
| Rating | — | **[3.7 (64 ratings)](https://appshunter.io/ios/app/tt-math-3/id1516354632/reviews)** |
| Number of ratings | — | **64** |
| Positive reviews | — | 57.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | — | Free |
| Size | 246 MB | 103 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Attainment Company](https://appshunter.io/developer/403989333) | [Teaching Textbooks, Inc.](https://appshunter.io/developer/1516345361) |

## What reviewers say

### ERSB

[App page](https://appshunter.io/ios/app/ersb/id970648169)

**In-app purchases:** none


### TT Math 3

[App page](https://appshunter.io/ios/app/tt-math-3/id1516354632)

This educational app offers interactive math lessons and practice problems for third graders. It provides automated grading, instant feedback, and step-by-step explanations, allowing for independent learning. Parents can track progress, and the app supports offline use for up to six lessons.

**Highlights:** 118 audiovisual lectures, Thousands of practice problems, Automated grading and instant feedback, Step-by-step audiovisual explanations, Parental progress tracking, Offline access for up to 6 lessons, Digitized textbook with search

**In-app purchases:** none


## Frequently asked questions

### Is ERSB free?

ERSB costs $149.99, with no in-app purchases.

### Is TT Math 3 free?

TT Math 3 is free to download, with no in-app purchases.

### Do ERSB or TT Math 3 have ads?

Neither ERSB nor TT Math 3 shows ads.

### Which is updated more often, ERSB or TT Math 3?

ERSB ships an update every 6 weeks, and TT Math 3 every 2 months. Most recently, ERSB was updated on September 15, 2026 and TT Math 3 on September 17, 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.*