# Place Value MAB Addition vs NAP Locked down browser

The clearest difference is price: NAP Locked down browser at Free against Place Value MAB Addition's $1.99. Place Value MAB Addition's advantage is update cadence (every 3 months vs every 7 months) and iOS requirement (12.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

NAP Locked down browser is free to download; Place Value MAB Addition costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Place Value MAB Addition ships an update every 3 months, NAP Locked down browser every 7 months. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Place Value MAB Addition | NAP Locked down browser |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/place-value-mab-addition/id541881278/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | — | 14.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | Paid | **Free** |
| Size | 16 MB | 67 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aleesha Kondys](https://appshunter.io/developer/478569400) | [Education Services Australia Ltd.](https://appshunter.io/developer/380266607) |

## What reviewers say

### Place Value MAB Addition

[App page](https://appshunter.io/ios/app/place-value-mab-addition/id541881278)

This app uses virtual Multibase Arithmetic Blocks (MAB) to model addition problems, helping children understand place value and regrouping. It offers interactive modules for teachers and students to practice addition up to 9999 without needing physical blocks.

**Highlights:** Virtual MAB blocks, Place value chart, Regrouping and trading mechanics, Addition practice up to 9999, Adjustable difficulty levels, Teaching module for custom lessons

**Features:** macOS Compatibility

**In-app purchases:** none


### NAP Locked down browser

[App page](https://appshunter.io/ios/app/nap-locked-down-browser/id1086807255)

This secure browser is designed for students taking standardized online assessments. It locks down the device to prevent cheating by restricting access to other apps and system functions during tests.

**Highlights:** Secure testing environment, Restricts app switching, Blocks unauthorized utilities, Prevents access to device resources, Facilitates NAPLAN and NAP Sample tests

**In-app purchases:** none


## Frequently asked questions

### Is Place Value MAB Addition free?

Place Value MAB Addition costs $1.99, with no in-app purchases.

### Is NAP Locked down browser free?

NAP Locked down browser is free to download, with no in-app purchases.

### Do Place Value MAB Addition or NAP Locked down browser have ads?

Neither Place Value MAB Addition nor NAP Locked down browser shows ads.

### Which is updated more often, Place Value MAB Addition or NAP Locked down browser?

Place Value MAB Addition ships an update every 3 months, and NAP Locked down browser every 7 months. Most recently, Place Value MAB Addition was updated on October 23, 2026 and NAP Locked down browser on October 25, 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.*