# Knō vs Authenticator for Rockstar

The clearest difference is review sentiment: Knō at 100% against Authenticator for Rockstar's 20%. Knō also leads on in-app purchases (none vs 6) and iOS requirement (9.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Authenticator for Rockstar sells 5 in-app purchases, starting at $4.99 per 7 days. Knō asks for nothing beyond the download.

Knō ships an update fortnightly, Authenticator for Rockstar every 3 weeks. The most recent releases landed on October 13, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Knō | Authenticator for Rockstar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.2 (22 ratings)](https://appshunter.io/ios/app/authenticator-for-rockstar/id6751236154/reviews)** |
| Number of ratings | — | **22** |
| Positive reviews | **100.0% of reviews** | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 100 MB | 79 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [kno](https://appshunter.io/developer/1309316330) | [Rhonda Wilcox](https://appshunter.io/developer/6794326016) |

## What reviewers say

### Knō

[App page](https://appshunter.io/ios/app/kno/id1309316331)

This app helps you manage and share your latest contact information with friends, clients, and colleagues. It ensures your contacts always have your updated details and notifies you of their changes. You maintain complete control over your data, deciding what to share and with whom.

**Highlights:** Share updated contact information, Receive contact updates from others, Control data sharing per profile, QR code for vCard sharing, Import/export vCards, Multi-profile organization

**In-app purchases:** none


### Authenticator for Rockstar

[App page](https://appshunter.io/ios/app/authenticator-for-rockstar/id6751236154)

This app provides advanced two-factor authentication (2FA) for enhanced account security. It offers fast authentication codes, seamless login verification, and dependable protection for your digital access. Features include biometric security and automatic backup options for easy data recovery.

**Highlights:** Two-Factor Authentication (2FA), Fast & Reliable Access, Biometric Protection (Face ID/Touch ID), Automatic Backup & Restore, Multi-Account Support, User-Friendly Interface

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Weekly-Trial | $4.99 | per 7 days |
| Monthly | $12.99 | per month |
| Yearly | $39.99 | per year |
| Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Knō free?

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

### Is Authenticator for Rockstar free?

Authenticator for Rockstar is free to download, with in-app purchases available.

### Do Knō or Authenticator for Rockstar have ads?

Neither Knō nor Authenticator for Rockstar shows ads.

### Which is updated more often, Knō or Authenticator for Rockstar?

Knō ships an update fortnightly, and Authenticator for Rockstar every 3 weeks. Most recently, Knō was updated on October 13, 2026 and Authenticator for Rockstar on October 17, 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.*