# Klass Online vs Authenticator App!

The clearest difference is in-app purchases: Klass Online at none against Authenticator App!'s 9. Klass Online also leads on ads (none vs shown) and device support (3 vs 1). Authenticator App!'s advantage is update cadence (every 4 days vs every 2 months). On price and iOS requirement there is nothing between them.

Both are free to download. Authenticator App! sells 9 in-app purchases, starting at $4.99 per 7 days. Klass Online asks for nothing beyond the download.

Klass Online ships an update every 2 months, Authenticator App! every 4 days. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Klass Online | Authenticator App! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (8 ratings)](https://appshunter.io/ios/app/authenticator-app/id6757789399/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 57 MB | 87 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Klass Online LLC](https://appshunter.io/developer/1834500074) | [VarMeta](https://appshunter.io/developer/1837594305) |

## What reviewers say

### Klass Online

[App page](https://appshunter.io/ios/app/klass-online/id6751298173)

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

**In-app purchases:** none


### Authenticator App!

[App page](https://appshunter.io/ios/app/authenticator-app/id6757789399)

This app enhances online security by generating one-time passwords for two-factor and multi-factor authentication. It offers quick QR code scanning for easy account setup and supports offline code generation, ensuring access even without an internet connection. Protect your personal, work, and financial accounts with robust security features.

**Highlights:** Generate secure OTP & TOTP codes, Quick QR code scanning, Support 2FA & MFA security, Face ID & Passcode protection, Offline code generation, Manage multiple accounts, Backup & Restore functionality

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Access | $4.99 | per 7 days |
| Weekly Pro Access | $6.99 | per 7 days |
| Week Premium | $9.99 | per 7 days |
| Week Pro | $9.99 | per 7 days |
| Monthly Pro Access | $19.99 | per month |
| Yearly Premium | $34.99 | per year |
| Yearly Pro | $39.99 | per year |
| Yearly Premium Access | $39.99 | per year |
| Authenticator – Lifetime Access | $59.99 | one-time |


## Frequently asked questions

### Is Klass Online free?

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

### Is Authenticator App! free?

Authenticator App! is free to download, with in-app purchases available.

### Do Klass Online or Authenticator App! have ads?

Authenticator App! shows ads; Klass Online does not.

### Which is updated more often, Klass Online or Authenticator App!?

Klass Online ships an update every 2 months, and Authenticator App! every 4 days. Most recently, Klass Online was updated on October 14, 2026 and Authenticator App! on October 5, 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.*