# Authenticator App vs RexWatchAlarm

The clearest difference is in-app purchases: RexWatchAlarm at none against Authenticator App's 11. Authenticator App's advantage is device support (5 vs 2) and iOS requirement (13.0 vs 15.1). On price, update cadence and ads there is nothing between them.

Both are free to download. Authenticator App sells 11 in-app purchases, starting at $5.99 per 7 days. RexWatchAlarm asks for nothing beyond the download.

Authenticator App ships an update every 9 days, RexWatchAlarm every 2 weeks. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Authenticator App | RexWatchAlarm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (87 ratings)](https://appshunter.io/ios/app/authenticator-app-2fa-mfa/id6472872177/reviews)** | — |
| Number of ratings | **87** | — |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 50 MB | 33 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hearttell US Limited](https://appshunter.io/developer/508262068) | [Rexgen Inc.](https://appshunter.io/developer/1811293162) |

## What reviewers say

### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-2fa-mfa/id6472872177)

Secure your online accounts with two-factor authentication. This app offers passwordless sign-ins, seamless autofill, and encrypted backups. It supports a vast range of services and works across Apple devices, with advanced security features like Face ID and Touch ID.

**Highlights:** Two-factor authentication (2FA), Multi-factor authentication (MFA), Passwordless sign-ins, Seamless password autofill, Encrypted iCloud backup, Offline OTP generation, Face ID & Touch ID security

**Features:** Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Authenticator App 2FA Weekly | $5.99 | per 7 days |
| Authenticator_App_2FA_MFA_Week | $6.99 | per 7 days |
| Authenticator App Monthly | $9.99 | per month |
| Authenticator App 2FA Monthly | $9.99 | per month |
| Authenticator App 2FA Monthly | $19.99 | per month |
| Authenticator_App_Yearly | $29.99 | per year |
| Authenticator App 2FA Yearly | $39.99 | per year |
| Authenticator App Yearly | $49.99 | per year |
| Authenticator_App_2FA_Yearly | $49.99 | per year |
| Authenticator App One-time | $49.99 | one-time |
| Authenticator_App_2FA_Onetime | $99.99 | one-time |


### RexWatchAlarm

[App page](https://appshunter.io/ios/app/rexwatchalarm/id6745206060)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Authenticator App free?

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

### Is RexWatchAlarm free?

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

### Do Authenticator App or RexWatchAlarm have ads?

Neither Authenticator App nor RexWatchAlarm shows ads.

### Which is updated more often, Authenticator App or RexWatchAlarm?

Authenticator App ships an update every 9 days, and RexWatchAlarm every 2 weeks. Most recently, Authenticator App was updated on October 25, 2026 and RexWatchAlarm on October 11, 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.*