# GDG London vs Authenticator App

The clearest difference is in-app purchases: GDG London at none against Authenticator App's 4. GDG London also leads on update cadence (every 2 days vs every 6 days) and iOS requirement (12.0 vs 15.6). Authenticator App's advantage is device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. Authenticator App sells 4 in-app purchases, starting at $5.99 per 7 days. GDG London asks for nothing beyond the download.

GDG London ships an update every 2 days, Authenticator App every 6 days. The most recent releases landed on September 8, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | GDG London | Authenticator App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/authenticator-app-auth-code/id6759444065/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 6 days |
| Monetization | — | Freemium |
| Size | 80 MB | 28 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [SUPRTECH LTD](https://appshunter.io/developer/1708024771) | [Pro App Company Limited](https://appshunter.io/developer/705247168) |

## What reviewers say

### GDG London

[App page](https://appshunter.io/ios/app/gdg-london/id6479203420)

**Features:** macOS Compatibility

**In-app purchases:** none


### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-auth-code/id6759444065)

Enhance your online security by generating secure one-time passwords for social media, email, and crypto wallets. This app offers a fast QR code scanner, biometric security, and works offline. It also includes a robust password manager and strong password generator.

**Highlights:** Time-based One-Time Passwords (TOTP), Lightning-Fast QR Code Scanner, Secure iCloud Backup & Sync (PRO), Universal Platform Compatibility, Biometric Security (Face ID/Touch ID), Offline Token Generation, Robust Password Manager, Strong Password Generator

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $5.99 | per 7 days |
| Monthly | $9.99 | per month |
| Yearly | $49.99 | per year |
| Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is GDG London free?

GDG London 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 GDG London or Authenticator App have ads?

Neither GDG London nor Authenticator App shows ads.

### Which is updated more often, GDG London or Authenticator App?

GDG London ships an update every 2 days, and Authenticator App every 6 days. Most recently, GDG London was updated on September 8, 2026 and Authenticator App on September 27, 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.*