PreviewBrowser vs Smart Brain App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PreviewBrowser
This application serves as a specialized tool for educators to review test items on iOS devices. It is designed for use with the Level12 delivery platform and is not intended for general public access.
- Test item review
- iOS device compatibility
- Level12 platform integration
- Educator-specific tool
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Note *** This app is not intended for general public use. The Preview Browser is a tool used by selected educators to review test items on iOS devices for the Level12 delivery platform.
Smart Brain App
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Welcome to Smart Brain, the ultimate mental arithmetic program designed for children from Grade 1 to Grade 4. Our scientifically proven methods stimulate both brain hemispheres, fostering systematic and efficient cognitive development. At Smart Brain, we prioritize building confidence in young learners, laying a solid foundation for their future success. Our interactive lessons are crafted to engage focused and confident students, ensuring they grasp concepts easily and excel academically. Based on the principle of neural plasticity, our curriculum facilitates the movement and connection of brain cells, optimizing development in children aged 6-12 years. We empower children to reach their full potential and thrive academically with a quality-driven approach. Join us in shaping a brighter future for our children. Let’s unlock their cognitive potential together with professionals at Smart Brain!
Screenshots
Verdict
The clearest difference is device support: Smart Brain App at 3 against PreviewBrowser's 1. On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
PreviewBrowser ships an update every 7 months, Smart Brain App every 8 months. The most recent releases landed on September 17, 2026 and May 17, 2026 respectively.
| Parameter | PreviewBrowser | Smart Brain App |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 7 months — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 50 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | NWEA | Zaher Al Abtah |
In-app purchases
PreviewBrowser
No in-app purchases
Smart Brain App
No in-app purchases
Questions
Is PreviewBrowser free?
Is Smart Brain App free?
Do PreviewBrowser or Smart Brain App have ads?
Which is updated more often, PreviewBrowser or Smart Brain App?
Other comparisons
