# Authenticator by Sentinel — 2FA - OTP Code Generator

> Securely manage and protect all your two-factor authentication (2FA) codes. (iPhone/iPad app by Tommaso Carpi.)

- Source: https://appshunter.io/ios/app/authenticator-by-sentinel/id1189922806 (this page in markdown: same URL + `.md`)
- Developer: [Tommaso Carpi](https://appshunter.io/developer/714996025)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 4.80/5 from 32 App Store ratings · 105 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 57 MB
- Languages: American English
- Released: 2017-01-10
- Data updated: 2026-08-28
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/authenticator-by-sentinel/id1189922806/reviews.md

## What is Authenticator by Sentinel?

Take control of your digital security with Sentinel Authenticator, the trusted way to manage and protect your two-factor authentication (2FA) codes. Fully compatible with Google Authenticator, Authy, and all other authenticators – making it effortless to switch or use alongside your existing apps.

/// Why Sentinel Authenticator?
	•	All Your Codes, One App – Store and manage every 2FA code in a single, secure place.
	•	Seamless Sync – Keep your codes up to date across all Apple devices with iCloud Keychain (encrypted by Apple) or Sentinel Cloud with end-to-end encryption.
	•	Organized & Accessible – Create folders for work and personal accounts to find what you need faster.
	•	Never Lose Access – Encrypted backups protect your codes so you always stay in control.

/// Personalization & Ease of Use
	•	900+ Custom Icons for instant account recognition
	•	8+ Themes & Layouts including Modern, Classic, Focus, and more
	•	iOS & macOS Widgets for quick access to your 2FA codes

/// Always Here for You
Need help? Contact us at hello@getsentinel.io – we usually respond within an hour.

Protect your accounts today. Download Sentinel Authenticator now and secure apps like Instagram, Google, Binance, Kraken, Robinhood, Discord, and Twitch.

For further details, review our policies:
Terms of Service: https://getsentinel.io/terms-of-service
Privacy Policy: https://getsentinel.io/privacy-policy

## Key features

- Manage all 2FA codes in one app
- Seamless sync across Apple devices
- Encrypted backups for code protection
- Organize accounts with folders
- Custom icons and themes
- iOS & macOS widgets for quick access

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly Subscription | $1.99 | per month |
| Annual Subscription | $9.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Access | $39.99 | one-time |
| Lifetime Access | $12.99 | one-time |


## What do users think of Authenticator by Sentinel?

Overall sentiment: positive

**Pros**

- 👍 Easy to use and set up
- 🚀 Seamless syncing across devices (iOS, macOS)
- 🔒 Secure and dependable 2FA solution
- 💡 Responsive and friendly developer
- 💰 One-time purchase/lifetime option appreciated
- 🔄 Works on older macOS versions
- ⌚ Seamless Apple Watch integration
- 📂 QR code import and manual setup supported
- ✨ Clean and customizable interface
- 📂 Folder organization is helpful
- 🌟 Replaces multiple authenticator apps
- ✅ Reliable and consistent performance
- 💡 Good replacement for other authenticator apps
- 🔄 Frequently updated with improvements
- 👨‍👩‍👧‍👦 Family sharing option available
- 🔑 iCloud Keychain support is a plus
- 🎨 Custom icon selector and theme options
- 💯 Highly recommended by users
- 🚀 Fast to open and use
- 🔍 Effortless search function on Mac
- 🛡️ Good replacement for Google Authenticator
- 💼 Useful for business and personal finances
- ✅ Works well on Apple devices
- 💡 Innovative features and ease of use
- 💰 Good value for the price

**Cons**

- 🐛 Widgets not working consistently (Mac/iPhone)
- 💰 Paid app, no free tier for some features
- 🐛 Some users experienced issues with syncing
- 🐛 Codes not working for specific services (e.g., Discord, Amazon)
- 🐛 App stuck on loading tokens for some users
- 🐛 Duplicate token entries in the past (Google Authenticator comparison)
- 🐛 Difficulty adding accounts for some users
- 🐛 Inconsistent app naming (Authenticator 2FA, Obsidian, etc.)
- 🐛 Unexpected charges or multiple purchases reported
- 🐛 No easy way to export all keys
- 🐛 Limited account limit for free version
- 🐛 No Apple Watch companion app initially
- 🐛 Paid features removed/changed, leading to frustration
- 🐛 No option to reorder or hide folders
- 🐛 No option to sort by email address or service
- 🐛 No option to show duplicates
- 🐛 No option to show date service added
- 🐛 No option to start on login
- 🐛 No option to delete items
- 🐛 No option to rename accounts
- 🐛 No option to edit accounts
- 🐛 No option to reorder accounts
- 🐛 App can be opaque and difficult to understand for some users
- 🐛 No Chinese version available

**Commonly reported bugs**

- Widgets not working on Mac Desktop and iPhone
- App stuck on loading tokens
- Syncing issues between devices
- Codes not working for specific services (Discord, Amazon)
- Unexpected charges/multiple purchases
- Loading screen issues on iPhone 12 Pro Max (resolved)
- Paid features (dark mode) removed/changed
- Cannot delete items
- Cannot rename accounts
- Cannot edit accounts
- Cannot reorder accounts
- Inconsistent widget behavior

**Most requested features**

- Ability to reorder/hide folders
- Sort accounts by email address or service
- Show duplicates
- Show date service added
- Backup options (more explicit)
- Start on login option
- Ability to delete items
- Ability to rename accounts
- Ability to edit accounts
- Ability to reorder accounts
- Watch companion app
- More customization options
- Add password keeper in details page
- Improve widget functionality
- Add Chinese language support
- Increase account limit beyond two for free tier
- Easier export of all keys

## Recent user reviews (10 of 105)

All indexed reviews: https://appshunter.io/ios/app/authenticator-by-sentinel/id1189922806/reviews.md

### 5/5 — GREAT 2FA Solution

*2025-12-12, version 10.0.3*

This Sentinel Authenticator 2FA app is GREAT.

I didn’t know what all it was capable of until I ran into a couple of difficult situations yesterday and put it through its paces.

This one inexpensive Pro/Premium purchase allows everything you need, including using it on your Apple Watch, which work seamlessly at activating codes.

And this app can set up codes manually and also allows importing of QR Code screenshots. 

Surprisingly, it works on very old versions of the Mac OS.

Customer support is quite responsive in time and comprehensiveness, even on my OS 11.7. 

An example was when my iPhone version asked me to upgrade to Pro. I already had Pro on my Mac. So I contacted support. They responded quickly and told me to click the upgrade link on the iPhone app. That resulted in the app saying I was already upgraded and the request to upgrade went away.

When recommending it to friends, tell them not to be confused with other apps named “Authenticator…”. Make sure it is created by Sentinel and/or Tommaso Carpi.

### 5/5 — THE Authenticator App worth paying for!

*2025-04-22, version 9.3.4*

I've used Google's free Authenticator App for years to store my 2FA tokens. Over the years I've had to change phones a couple of times and in doing so I've experienced duplicate token entries appearing for no reason and thus I've always lived in fear of 2FA tokens corrupting or deleting entirely – being locked out of any vital accounts I need to operate my business and finances would be an utter nightmare and the amount of time and hassle it would cost me makes it completely worthwhile paying/investing to remove the risk entirely:

Sentinel runs on iOS and macOS and sync's my 2FA tokens across multiple devices and has backups too (all secured with apple iCloud and keychain). The one-off 'Fusion Lifetime' in-app purchase is a no-brainer given how effective it is and the QR code import feature makes it ridiculously easy to move everything over from Google in an instant.

The developer is extremely friendly and responsive to questions and updates too! 5 Stars – 100% Recommend.

### 5/5 — is good

*2025-01-28, version 9.3.0*

is salty? What is salty?

### 5/5 — Really Good 2FA Service

*2025-01-24, version 9.2.1*

This app provides exactly the kind of 2FA I want. Much better, in my opinion, than having a code sent to one’s phone via TXT. It’s easy to add the service to compatible Web sites and apps and has served me well for a long time. I use it on both desktop and mobile devices. The app is updated regularly and in the years I’ve been using it, has never had a problem. Thanks, Sentinel.

### 5/5 — Great authenticator

*2025-01-02*

Great authenticator beautiful, easy to use on all platforms. Keeps getting better

### 5/5 — Best 2FA App hands down!

*2024-12-29*

Fantastic UX, excellent functionality, dependable, secure and extremely responsive developer makes this a clear winner amongst a sea of 2FA apps. I’ve tried them all, nothing compares! Support a great indie developer!

### 5/5 — Fantastic

*2024-12-19, version 9.2*

Easy to use and to set up. Finally I have a simple too that does exactly what I need, without many unnecessary features. Direct to the point. Fantastic.

### 5/5 — Authenticator is safe and so easy to use

*2024-12-19, version 9.2*

Excellent app that works both on Mac and iOS devices. Easy to setup and integrates well into the Apple ecosystem.

### 5/5 — Best 2FA & MFA App on the App Store

*2024-12-18*

I have used pretty much every single authenticator on the App Store and each one is missing features that Authenticator has.  I wish I would have found this app earlier. I would have had a great experience off the bat andI I would have saved money on bad 2FA/MFA apps.

### 5/5 — I have used this forever. Great developer who listens to feedback!

*2024-12-17, version 9.2*

This single app is the one which released me from using several different apps. I have been using this for years, and the developer is awesome.

## Frequently asked questions about Authenticator by Sentinel

### What does Sentinel Authenticator do?

Sentinel Authenticator is an app designed to manage and protect your two-factor authentication (2FA) codes. It allows you to store all your 2FA codes in a single, secure location, making it easier to access and manage your account security.

### How does Sentinel Authenticator keep my codes safe?

The app offers encrypted backups to protect your codes, ensuring you never lose access to your accounts. It also supports seamless syncing across Apple devices using iCloud Keychain or Sentinel Cloud with end-to-end encryption for added security.

### Is Sentinel Authenticator free to use?

The application is free to download and use, with optional in-app purchases available for enhanced features or customization. This allows users to try the core functionality before committing to any purchases.

### What devices is Sentinel Authenticator compatible with?

Sentinel Authenticator is compatible with iOS and macOS devices. It offers features like iCloud Keychain syncing and widgets for quick access on these platforms.

### Can I use Sentinel Authenticator with my existing authenticator apps?

Yes, the app is fully compatible with Google Authenticator, Authy, and all other authenticators. This makes it easy to switch to or use Sentinel Authenticator alongside your current 2FA solutions.

## Version history (last 5 releases)

### 10.2.2 — 2026-05-23

What's new in this version:
• New enhanced UI for some visualizations
• Fixes a few nasty bugs
• Improved onboarding flow

### 10.2.1 — 2026-05-20

What's new in this version:
• New enhanced UI for some visualizations
• Fixes a few nasty bugs
• Improved onboarding flow

### 10.2 — 2026-05-12

What's new in this version:
• New enhanced UI for some visualizations
• Fixes a few nasty bugs
• Improved onboarding flow

### 10.1.2 — 2026-03-18

Bug fixes and performance improvements

### 10.1.1 — 2026-01-11

Bug fixes and performance improvements

## Apps similar to Authenticator by Sentinel

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Authenticator °](https://appshunter.io/ios/app/authenticator/id6446651396) | 4.8 (594) | Free | Productivity |
| [Microsoft Authenticator](https://appshunter.io/ios/app/microsoft-authenticator/id983156458) | 4.7 (686,512) | Free | Productivity |
| [Authenticator App](https://appshunter.io/ios/app/authenticator-app/id1538761576) | 4.6 (47,910) | Free | Productivity |
| [Authenticator App+](https://appshunter.io/ios/app/authenticator-app-plus/id1610508128) | 4.8 (11,857) | Free | Productivity |
| [2FA Authenticator Secure](https://appshunter.io/ios/app/2fa-authenticator-secure/id1604264315) | 4.4 (172) | Free | Productivity |
| [Authenticator App: 2FA, MFA](https://appshunter.io/ios/app/authenticator-app-2fa-mfa/id6472872177) | 4.2 (86) | Free | Productivity |

## More apps by Tommaso Carpi

- [Warden: Crypto Wallet Security](https://appshunter.io/ios/app/warden-crypto-wallet-security/id1663191731)
- [Sushi News - Breaking Stories](https://appshunter.io/ios/app/sushi-news-breaking-stories/id6475045585)
- [Quotes - Daily Motivation](https://appshunter.io/ios/app/quotes-daily-motivation/id6758265228)
- [Squidly: Crypto Portfolio](https://appshunter.io/ios/app/squidly-crypto-portfolio/id6802036002)

All apps by Tommaso Carpi: https://appshunter.io/developer/714996025

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*