ERSB vs TT Math 3
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ERSB
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Early Reading Skills Builder™(ERSB) curriculum, based on a multi-year research project from the University of North Carolina at Charlotte, is a stepping stone for graduates of Attainment’s ELSB Curriculum. ERSB takes students who mastered these early literacy skills to a 2nd grade reading level. It incorporates systematic instruction and ongoing assessments to teach students to read independently. It’s been proven effective for students with moderate to severe intellectual disability and/or autism, including those with complex communication needs.
TT Math 3
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.
- 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
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The Teaching Textbooks Math 3 app makes your TT course even better! Not only will your student enjoy math while learning independently, but, with the app, that learning can also take place on the go. Even when offline! Specifically, the app can be used offline for up to 6 lessons at a time. That makes it perfect for homeschool parents who need their kids to stay productive while the family is out and about during the day. The app’s other features include… • 118 audiovisual lectures that teach every core concept in the standard 3rd grade curriculum • thousands of problems that give students all the practice they need to master each concept • automated grading and instant feedback for every single problem • step-by-step audiovisual explanations to every single problem so students can see exactly what they did wrong when mistakes are made (This makes the program feel as if a tutor is at the student’s side!) • parental controls that let you track your student’s progress • the digitized version of the printed Teaching Textbooks Math 3 textbook (with a search feature and a hyper-linked index) • no advertising or in-app purchase offers • Internet connectivity is required, but you can remain offline for up to 6 lessons.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | ERSB | TT Math 3 |
|---|---|---|
| Price | $149.99 | Free — better |
| Rating | — | 3.7 (64 ratings) — better |
| Positive reviews | — | 57.1% of reviews |
| Number of ratings | — | 64 — better |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPad | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 246 MB | 103 MB |
| Age rating | 4+ | 4+ |
| Developer | Attainment Company | Teaching Textbooks, Inc. |
In-app purchases
ERSB
No in-app purchases
TT Math 3
No in-app purchases
Questions
Is ERSB free?
Is TT Math 3 free?
Do ERSB or TT Math 3 have ads?
Which is updated more often, ERSB or TT Math 3?
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