# Sigma live vs Black Box

The clearest difference is update cadence: Black Box at every 3 days against Sigma live's every 2 months. Sigma live's advantage is device support (3 vs 1) and iOS requirement (9.0 vs 16.0). On price, 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.

Sigma live ships an update every 2 months, Black Box every 3 days. The most recent releases landed on October 11, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Sigma live | Black Box |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (37 ratings)](https://appshunter.io/ios/app/black-box-lock-restrict-apps/id6547836962/reviews)** |
| Number of ratings | — | **37** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | — | Free |
| Size | 5 MB | 68 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Rafael Francisco](https://appshunter.io/developer/1070696043) | [俊涛 刘](https://appshunter.io/developer/1702439770) |

## What reviewers say

### Sigma live

[App page](https://appshunter.io/ios/app/sigma-live/id1091561095)

**In-app purchases:** none


### Black Box

[App page](https://appshunter.io/ios/app/black-box-lock-restrict-apps/id6547836962)

Secure your phone by locking and restricting access to sensitive applications. Protect your private data with advanced password protection and prevent unauthorized app usage or in-app purchases. Enjoy comprehensive digital privacy with an easy-to-use interface.

**Highlights:** App locking with password protection, App disappearance for hidden access, App usage restrictions, Secure privacy with advanced passwords, Payment locking for in-app purchases, Intuitive interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Sigma live free?

Sigma live is free to download, with no in-app purchases.

### Is Black Box free?

Black Box is free to download, with no in-app purchases.

### Do Sigma live or Black Box have ads?

Neither Sigma live nor Black Box shows ads.

### Which is updated more often, Sigma live or Black Box?

Sigma live ships an update every 2 months, and Black Box every 3 days. Most recently, Sigma live was updated on October 11, 2026 and Black Box on October 14, 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.*