What is Reddit's opinion of Calculator Vault- Gallery Lock?

From 3.5 billion Reddit comments

Piggybacking top comment: Iirc there's an app that looks (and works) like a normal calculator app yet if you enter a certain command it opens your galery (or a restricted part of your galery).

I think it was one of those:

>https://play.google.com/store/apps/details?id=com.calculator.vault

>https://play.google.com/store/apps/details?id=com.fotoable.calculator.plus

https://play.google.com/store/apps/details?id=com.calculator.vault

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https://play.google.com/store/apps/details?id=com.calculator.vault

I use this app called calculator. Really easy to use, and it's free.

https://play.google.com/store/apps/details?id=com.calculator.vault

Here's the link

https://play.google.com/store/apps/details?id=com.calculator.vault