# Lockd' vs CalcGate | App Lock with Math

The clearest difference is iOS requirement: Lockd' at 18.2 against CalcGate | App Lock with Math's 26.2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Lockd' ships an update monthly, CalcGate | App Lock with Math every 3 weeks. The most recent releases landed on June 1, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Lockd' | CalcGate | App Lock with Math |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 8 MB | 4 MB |
| Requires iOS | **18.2** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Deepak Bahl](https://appshunter.io/developer/1802917028) | [HIDEYUKI INAGAKI](https://appshunter.io/developer/1819355611) |

## What reviewers say

### Lockd'

[App page](https://appshunter.io/ios/app/lockd/id6756148130)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Lockd' free?

Lockd' is free to download, with no in-app purchases.

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

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

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

Neither Lockd' nor CalcGate | App Lock with Math shows ads.

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

Lockd' ships an update monthly, and CalcGate | App Lock with Math every 3 weeks. Most recently, Lockd' was updated on June 1, 2026 and CalcGate | App Lock with Math on September 12, 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.*