# Serenity Bookings App vs Authenticator App

The clearest difference is rating: Authenticator App at 3.0 against Serenity Bookings App's 2.3. Authenticator App also leads on iOS requirement (13 vs 15.0). Serenity Bookings App's advantage is in-app purchases (none vs 6) and ads (none vs shown). On price, ratings volume and device support there is nothing between them.

Both are free to download. Authenticator App sells 6 in-app purchases, starting at $5.99 per 7 days. Serenity Bookings App asks for nothing beyond the download.

Authenticator App holds the better App Store score, 3.0 against 2.3. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews complicate that: 33% of Serenity Bookings App's written reviews are positive against 8% of Authenticator App's, so the app with the better star average is not the one people write more warmly about.

Serenity Bookings App ships an update every 3 weeks, Authenticator App every 2 months. The most recent releases landed on October 15, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Serenity Bookings App | Authenticator App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/serenity-bookings-app/id1500667800/reviews) | **[3.0 (3 ratings)](https://appshunter.io/ios/app/authenticator-app-2fa-secure/id6479735490/reviews)** |
| Number of ratings | 3 | 3 |
| Positive reviews | **33.3% of reviews** | 8.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 88 MB | 19 MB |
| Requires iOS | 15.0 | **13** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Treshna Enterprises](https://appshunter.io/developer/959435261) | [Authenticator](https://appshunter.io/developer/1737163388) |

## What reviewers say

### Serenity Bookings App

[App page](https://appshunter.io/ios/app/serenity-bookings-app/id1500667800)

Easily manage appointments, class bookings, and memberships for your studio, club, or salon. Stay updated with real-time timetables, receive reminders, and track your progress towards fitness goals. Requires your facility to use the Serenity management system.

**Highlights:** View real-time class timetables, Manage appointments and bookings, Receive booking reminders, Update personal profile information, Track activity statistics and progress

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none


### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-2fa-secure/id6479735490)

This app provides a secure way to manage your online accounts with two-factor authentication (2FA). It generates time-based one-time passwords (TOTP) to protect against unauthorized access and offers features like cloud synchronization, a private photo album, and a security center for enhanced digital safety.

**Highlights:** Two-factor authentication (2FA) support, Generates time-based one-time passwords (TOTP), Cloud synchronization for data backup, Private photo and video album, Security Center with backup and checks, Metadata remover for photos

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Authenticator Weekly Plan | $5.99 | per 7 days |
| Authenticator Weekly Plan | $7.99 | per 7 days |
| Authenticator Monthly Plan | $9.99 | per month |
| Authenticator Yearly Plan | $39.99 | per year |
| Authenticator Yearly Plan | $39.99 | per year |
| Authenticator Yearly Plan | $39.99 | per year |


## Frequently asked questions

### Is Serenity Bookings App free?

Serenity Bookings App is free to download, with no in-app purchases.

### Is Authenticator App free?

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

### Which has better reviews, Serenity Bookings App or Authenticator App?

Authenticator App is rated higher. Serenity Bookings App averages 2.3 out of 5 from 3 ratings, while Authenticator App averages 3.0 from 3 ratings.

### Do Serenity Bookings App or Authenticator App have ads?

Authenticator App shows ads; Serenity Bookings App does not.

### Which is updated more often, Serenity Bookings App or Authenticator App?

Serenity Bookings App ships an update every 3 weeks, and Authenticator App every 2 months. Most recently, Serenity Bookings App was updated on October 15, 2026 and Authenticator App on October 20, 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.*