# CalcGate | App Lock with Math vs Math Shield

The clearest difference is in-app purchases: CalcGate | App Lock with Math at none against Math Shield's 3. Math Shield's advantage is update cadence (every 2 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Math Shield sells 3 in-app purchases, starting at $3.99 per month. CalcGate | App Lock with Math asks for nothing beyond the download.

CalcGate | App Lock with Math ships an update every 3 weeks, Math Shield every 2 days. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | CalcGate | App Lock with Math | Math Shield |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 4 MB | 20 MB |
| Requires iOS | 26.2 | **26.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [HIDEYUKI INAGAKI](https://appshunter.io/developer/1819355611) | [Vinoth Ramajeyam](https://appshunter.io/developer/1665205517) |

## What reviewers say

### CalcGate | App Lock with Math

[App page](https://appshunter.io/ios/app/calcgate-app-lock-with-math/id6762510886)

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

**In-app purchases:** none


### Math Shield

[App page](https://appshunter.io/ios/app/math-shield-focus-and-unlock/id6774190945)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Math Shield Pro Monthly | $3.99 | per month |
| Math Shield Pro Yearly | $12.99 | per year |
| Math Shield Pro - Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is CalcGate | App Lock with Math free?

CalcGate | App Lock with Math is free to download, with no in-app purchases.

### Is Math Shield free?

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

### Do CalcGate | App Lock with Math or Math Shield have ads?

Neither CalcGate | App Lock with Math nor Math Shield shows ads.

### Which is updated more often, CalcGate | App Lock with Math or Math Shield?

CalcGate | App Lock with Math ships an update every 3 weeks, and Math Shield every 2 days. Most recently, CalcGate | App Lock with Math was updated on October 10, 2026 and Math Shield on October 7, 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.*