# VIPER vs λ | Cortex Go

The clearest difference is review sentiment: λ | Cortex Go at 38% against VIPER's 0%. λ | Cortex Go also leads on update cadence (every 3 months vs every 6 months) and iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

VIPER ships an update every 6 months, λ | Cortex Go every 3 months. The most recent releases landed on September 7, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | VIPER | λ | Cortex Go |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cortex-go/id1460785740/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | **37.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 34 MB | 28 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Norbain SD Ltd.](https://appshunter.io/developer/428893356) | [adata ltd](https://appshunter.io/developer/372163703) |

## What reviewers say

### VIPER

[App page](https://appshunter.io/ios/app/viper-remote/id1258387156)

Connect to Viper recorders remotely using your iOS device. View live and recorded footage, control PTZ cameras, and receive event push notifications for enhanced security monitoring.

**Highlights:** Remote recorder connection, PTZ camera control, Live image viewing, Recorded image viewing, Event push notifications, P2P connection

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

**In-app purchases:** none


### λ | Cortex Go

[App page](https://appshunter.io/ios/app/cortex-go/id1460785740)

Access and manage your video surveillance system remotely. View live feeds, playback recordings, and receive instant alerts for motion or alarms. Supports multiple NVR models and offers advanced features like digital zoom and PTZ control.

**Highlights:** Live video streaming, Video playback and recording, Push notifications for alarms/motion, Digital zoom and PTZ control, Multi-site connectivity, Instant video snapshots and sharing, P2P connectivity for remote setup

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VIPER free?

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

### Is λ | Cortex Go free?

λ | Cortex Go is free to download, with no in-app purchases.

### Do VIPER or λ | Cortex Go have ads?

Neither VIPER nor λ | Cortex Go shows ads.

### Which is updated more often, VIPER or λ | Cortex Go?

VIPER ships an update every 6 months, and λ | Cortex Go every 3 months. Most recently, VIPER was updated on September 7, 2026 and λ | Cortex Go on September 3, 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.*