# MailCat vs Authenticator

The clearest difference is price: Authenticator at Free against MailCat's $3.99. Authenticator also leads on update cadence (every 2 weeks vs every 4 months). MailCat's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Authenticator is free to download; MailCat costs $3.99 up front. Authenticator sells 2 in-app purchases, starting at $49.99 per year. MailCat asks for nothing beyond the download.

MailCat ships an update every 4 months, Authenticator every 2 weeks. The most recent releases landed on October 23, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | MailCat | Authenticator |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/mailcat/id459361669/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 4 MB | 36 MB |
| Requires iOS | **16.6** | 17 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Seimitsusakufu LLC](https://appshunter.io/developer/459361672) | [AQUAWOOD PTE. LTD.](https://appshunter.io/developer/1774212005) |

## What reviewers say

### MailCat

[App page](https://appshunter.io/ios/app/mailcat/id459361669)

This app helps organize your inbox by automatically categorizing emails using machine learning and custom rules. It can filter spam and move messages to designated mailboxes, supporting IMAP accounts.

**Highlights:** Machine learning spam filtering, Rule-based email categorization, IMAP account support, Move emails to specified mailboxes, Blacklist and spam learning data, Multiple account switching

**Features:** Vision Pro support

**In-app purchases:** none


### Authenticator

[App page](https://appshunter.io/ios/app/authenticator-2fa-and-passkey/id6736977421)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| year | $49.99 | per year |
| lifetime | $99.99 | one-time |


## Frequently asked questions

### Is MailCat free?

MailCat costs $3.99, with no in-app purchases.

### Is Authenticator free?

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

### Do MailCat or Authenticator have ads?

Authenticator shows ads; MailCat does not.

### Which is updated more often, MailCat or Authenticator?

MailCat ships an update every 4 months, and Authenticator every 2 weeks. Most recently, MailCat was updated on October 23, 2026 and Authenticator on October 7, 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.*