# Microsoft Authenticator vs Mekos Mobile Letter

The clearest difference is price: Microsoft Authenticator at Free against Mekos Mobile Letter's $9.99. Microsoft Authenticator also leads on chart position (#13 vs unranked). Mekos Mobile Letter's advantage is update cadence (weekly vs every 3 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Microsoft Authenticator is free to download; Mekos Mobile Letter costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Microsoft Authenticator ships an update every 3 weeks, Mekos Mobile Letter weekly. The most recent releases landed on October 26, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Microsoft Authenticator | Mekos Mobile Letter |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.7 (717K ratings)](https://appshunter.io/ios/app/microsoft-authenticator/id983156458/reviews)** | — |
| Number of ratings | **717K** | — |
| Positive reviews | 11.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free | — |
| Best chart rank | **#13** | — |
| Size | 226 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Microsoft Corporation](https://appshunter.io/developer/298856275) | [Mekos Mobile Apps LLC](https://appshunter.io/developer/975350640) |

## What reviewers say

### Microsoft Authenticator

[App page](https://appshunter.io/ios/app/microsoft-authenticator/id983156458)

**Currently charting:** #13 Top Free · Productivity, #136 Top Free (US App Store)

Securely sign into online accounts with multi-factor authentication, passwordless login, or password autofill. Manage multiple accounts, including non-Microsoft services, and access Microsoft products and services seamlessly.

**Highlights:** Multi-factor authentication (MFA), Passwordless sign-in, Password autofill, Support for non-Microsoft accounts, Account management for work/school, Cert-based authentication

**In-app purchases:** none

**What reviewers like**

- 🚀 Seamless authentication
- 🔒 Secure login process
- 👍 Convenient passwordless sign-in
- 🚀 Smooth app performance

**What reviewers complain about**

- 🐛 Broken Apple Watch functionality
- 🐛 Backup and restore issues
- 🐛 Confusing login flow
- 🐛 Accounts disappearing after phone change

**Reported bugs**

- Authenticator app getting locked and requiring Touch ID
- Notification failures and authentication issues
- Accounts not syncing properly between devices

**Requested features**

- Add search and sorting for accounts
- Improve Apple Watch integration
- Provide better backup and restore options
- Streamline login process


### Mekos Mobile Letter

[App page](https://appshunter.io/ios/app/mekos-mobile-letter/id6776809658)

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

**In-app purchases:** none


## Frequently asked questions

### Is Microsoft Authenticator free?

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

### Is Mekos Mobile Letter free?

Mekos Mobile Letter costs $9.99, with no in-app purchases.

### Do Microsoft Authenticator or Mekos Mobile Letter have ads?

Neither Microsoft Authenticator nor Mekos Mobile Letter shows ads.

### Which is updated more often, Microsoft Authenticator or Mekos Mobile Letter?

Microsoft Authenticator ships an update every 3 weeks, and Mekos Mobile Letter weekly. Most recently, Microsoft Authenticator was updated on October 26, 2026 and Mekos Mobile Letter on October 21, 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.*